DePaul University From the SelectedWorks of Christopher J Einolf 2011 Who Volunteers? Constructing a Hybrid Theory Susan M Chambre Christopher J Einolf, DePaul University Available at: http://works.bepress.com/christopher_einolf/11/ Chambre and Einolf Who Volunteers Working Paper – June 2011 Susan Chambré and Christopher J. Einolf Who Volunteers? Constructing a Hybrid Theory Abstract This paper describes three major theoretical perspectives in research on volunteering: sociological theories which stress the importance of social context, social roles, social integration and social networks; prosocial and value orientation theories which emphasize the impact of individuals’ attitudes and beliefs regarding the importance of altruistic behavior and a sense of social responsibility; and resource theories that focus on the human capital and economic factors which both allow individuals to volunteer in meaningful ways and make them attractive to organizations. Using the 1995 Midlife in the United States dataset, we operationalized the three theories and examined their relative explanatory power. The most predictive variables were those measuring social context, roles, and integration, followed by measures of values, and then measures of resources. Combining variables from all three traditions with demographic controls predicted 40.7% of the variation in volunteering. 1 Chambre and Einolf Who Volunteers Working Paper – June 2011 In addition to its value to research, our hybrid model offers some directions for recruitment and retention since, at different stages of the life cycle, social roles and social networks either operate as constraints or triggers for volunteering. Indeed, various sociological factors -- social context, roles, and integration --- are the best predictors of volunteering, with a higher R-squared than prosocial value orientations and resources. 2 Chambre and Einolf Who Volunteers Working Paper – June 2011 Who Volunteers? Constructing a Hybrid Theory INTRODUCTION Volunteering is a distinctive, significant and widespread social practice. Surveys reveal that between one quarter and one half of American adults engage in volunteer work over the course of a year, with estimates varying according to differences in survey methodology and the ways that questions are worded (Brown, 2000; Rooney, Steinberg and Schervish, 2004). Despite methodological differences and yearly fluctuations, it is quite clear that the overall rate of volunteering has increased over the past five decades (Corporation for National and Community Service, 2006; Putnam, 2000). In 1965, the Americans Volunteer Survey conducted by the U.S. Department of Labor revealed that 16% of American over the age of 14 volunteered in the previous year (U.S. Department of Labor, 1965). Data from the 2009 Current Population Survey shows that 26.8% of Americans over the age of 16 volunteered during the previous year (U.S. Bureau of Labor Statistics, 2010). Scholarship on volunteering, dating back to Sills’ (1957) study of volunteers for the March of Dimes, has documented its myriad social and individual benefits as well as the social, cultural, political and institutional factors that shape individual engagement in volunteer work. Empirical research, much of it summarized in a recent book by Musick and Wilson (2008), is indeed voluminous. This research has documented an important Janus-faced quality of volunteerism, that it benefits both volunteers and society. For individuals, 3 Chambre and Einolf Who Volunteers Working Paper – June 2011 volunteering enhances health and well-being (Thoits and Jewitt, 2001) and helps people cope with various life events (Midlarsky, 1991). For society, volunteering provides useful labor and builds social capital, contributing to the civil society is central to a healthy democracy (Brown, 2000; Putnam, 2000; Simpson, 1996). Volunteering, which involves donating one’s time without payment, takes diverse forms: it ranges from participating in a social movement, soliciting names for a petition, serving as a mentor, or working in a soup kitchen. Most of the early research on volunteering documented individual variables associated with involvement, such as gender, age, race, education, income and religious attendance. Enormous strides have been made in our empirical and conceptual understanding of volunteerism with greater use of multivariate analysis and the introduction of a broader range of independent variables. Recent scholarship has moved beyond the empirical to develop theories and models of the antecedents of volunteering. However, most studies feature a limited range of variables. Building on past research and theory, this paper has three objectives. First, it reviews and organizes previous research into three major theoretical traditions. Second, it empirically examines the explanatory power of each theoretical framework. Third, it constructs a hybrid theory of volunteering that describes three important pathways into volunteering. It then uses the theory to develop several general recommendations for recruiting volunteers. 4 Chambre and Einolf Who Volunteers Working Paper – June 2011 REVIEW OF THE LITERATURE Who Volunteers? The earliest scholarly work on volunteerism concentrated on the descriptive question of who volunteers and who does not. The first large surveys, conducted by the U.S. Department of Labor in 1965 and 1973, revealed that women were more likely to volunteer than men, and showed an inverted Ushaped distribution regarding age, with the highest rates of participation among middle aged people. Better educated people, whites, and those with larger incomes had higher rates of volunteering. These relationships have been found in every subsequent study, with one major change: a sharp increase in volunteering by older people. With changed cultural messages and systematic programs directed toward older people (Chambré, 1993), the link between age and volunteering was altered. People over the age of sixty became much more likely to volunteer and the probability of continued participation well into old age increased. While most observers view increases in older volunteering as a powerful trend likely to continue (Einolf, 2008; Freedman, 1999), others view it as primarily due to the high levels of civic engagement of one age cohort, the “greatest” or “long civic” generation, who reached maturity during the Great Depression and World War II (Goss, 1999; Putnam 2000). Most of the initial research relied on data sources that did not include information on religious affiliation or attendance at religious services. The first extensive discussion on the connection between religion and volunteering was 5 Chambre and Einolf Who Volunteers Working Paper – June 2011 documented in a study of older persons which revealed significant differences between religious groups, with higher rates of volunteering among Jews and Protestants than Catholics (Chambré, 1987). Subsequent surveys demonstrate that religious participation has a strong influence on volunteering, as well as other types of civic engagement. When David Horton Smith (1994) surveyed research on volunteering and voluntary association membership in the early 1990’s, he observed that there had been little theorizing. While there are significant challenges to creating a unified theory of volunteering (Hustinx, Cnaan and Handy, 2010), it is fair to say that this situation has changed and that there are are numerous theories of volunteering, most of them middle range. We classify them into three theoretical traditions (Table 1): sociological, prosocial and value orientations, and resource theories. Sociological theories Sociological theories focus on the social and cultural influences that predispose some individuals to become engaged in volunteer work. Social context influences volunteering at the macro and meso level, while social networks and social roles influence volunteering on the micro level. Macro and Meso Level Theories – Social Context: Volunteering is conditioned by broad contextual and community level factors. One contextual factor which may affect volunteering in an unexpected fashion is the state of the economy. While one might expect volunteering to decrease during periods of economic decline since people would spend time working or looking for work, this 6 Chambre and Einolf Who Volunteers Working Paper – June 2011 has not occurred in the recent economic downturn in 2008 and 2009 (Corporation for National & Community Service, 2010). Sills’ (1957) study of March of Dimes volunteers was the first empirical investigation of an important phenomenon in American life: the mobilization of volunteers in response to the emergence of a new social issue, a series of events, or a social catastrophe like a natural disaster, where there is a convergence of social activity both as a way of providing unpaid labor and channeling individuals’ desire to help and to cope. Perhaps the most extensive research on this type of volunteering are studies of AIDS volunteers, which suggest that individuals infected with HIV and their friends, families and lovers were the earliest volunteers (Chambré, 1991a, 1991b; Omoto and Snyder, 2002). Once the sense of urgency decreased and more funding became available, organizations became professionalized and the initial centrality of volunteers decreased (Chambré, 2006). There are earlier historical precedents to this pattern, most notably the development of social work which began in the work of volunteer friendly visitors in the late 19th century (Becker, 1964) as well as the creation of new occupational roles like firefighting (Ellis and Noyes, 1978). In addition to broad historical factors, rates of volunteerism are influenced by meso level factors: the neighborhood, state, province and country where a person lives are influential (Anheier and Salamon, 1999; Mellor, Hayeshi, et. al., 2009; Musick and Wilson, 2008; Rotolo and Wilson, n.d.). This is partly due to cultural traditions and religious differences; for example, the highest rates of volunteering in the U.S. are in Utah, a largely Mormon state. Wolpert (1989, 7 Chambre and Einolf Who Volunteers Working Paper – June 2011 1993) traces these differences to cultures of generosity that are also evident in various public policies like welfare payment levels. Although there might be regional differences in philanthropy (Schneider, 1996), empirical research on this issue has yielded contradictory findings (Caputo, 2009; Kim and Hong; 1998) . Similarly, the impact of neighborhood effects is unclear (Perkins, 1996; Wilson, 2000). Although neighborhoods with a relatively higher nonprofit density might have higher participation (Sampson, McAdam, et. al., 2005), voluntary association membership tends to be of shorter duration in dense organizational niches (McPherson and Rotolo, 1996). Racially homogeneous neighborhoods have higher rates of volunteering (Portney and Berry, 1997), which is consistent with Putnam’s (2007) observation that racial and ethnic heterogeneity reduce levels of social capital. Surprisingly, there is only slightly lower participation in central cities (44%) than in suburbs and rural areas (49%) (Musick and Wilson, 2008). Social context clearly plays a role in volunteering, both by encouraging a sense of community and social obligation (Omoto and Snyder, 2002) and by influencing the opportunities to become involved. Micro Level Theories – Social Integration and Social Roles Integration: Volunteering is one facet of a more socially engaged lifestyle, since there is a strong correlation between volunteering and a host of active leisure pursuits like interacting with friends, neighbors and family. In contrast, individuals who do not volunteer spend more time watching television or listening to the radio, sitting and thinking, or doing nothing (Putnam, 2000; Chambré, 8 Chambre and Einolf Who Volunteers Working Paper – June 2011 1987). Individuals who tend to be more outgoing and socially involved also tend to be more likely to step forward and are more often asked to volunteer (Bekkers, 2005; Okun, Pugliese and Rook, 2007; Rossi, 2001). In addition, volunteering is a way to cultivate new social relationships (Prouteau and Wolff, 2008). Smith’s (1994) social integration model points out that participation becomes an engrained social practice. In fact, Caro and Bass (1995) found that over forty percent of volunteers worked for two or more organizations and slightly more than one quarter were involved in three or more groups. People who express a strong sense of community obligation (Okun and Michel, 2006) and have strong social and commmunal ties (Jones, 2006) tend to act out those commitments as volunteers. There is also a great deal of continuity of civic engagement over the course of people’s lives (McFarland and Thomas, 2006). People who volunteer tend to be ‘joiners’ (Hausekenecht, 1962), with more extensive social networks (Apinunmahakul and Devlin, 2008), and are more involved in a host of social and recreational activities than nonvolunteers (Chambré, 1987). Having friends who volunteer also has a positive effect on volunteer engagement (Wymer, 1999). Social Roles: Other social roles influence volunteering, as volunteering can compensate for a lack of fulfillment in other roles (Staines, 1980), or act an extension of work and family obligations (Choi, Burr, et. al., 2007). This spillover effect is evident in the work-volunteering nexus, both because participation is expected in some careers, and because the human and cultural capital associated with a person’s job influence a person’s success in finding and 9 Chambre and Einolf Who Volunteers Working Paper – June 2011 succeeding in a volunteer job (Wilson and Musick, 1997b). Having a flexible work schedule (Freeman, 1997) and a stable work history rather than a “disorderly” sequence of jobs (Wilensky, 1961b; Rotolo and Wilson, 2003) are both positively associated with volunteering. The impact of other social roles as incentives explains the age-related Ushaped distribution of voluntary association membership (Cutler, 1977; Cutler and Hendricks, 2000) and volunteering. Transitions at different stages of the life course explain both attachment to the volunteer role and shifting allegiances to specific volunteer positions, since “certain life stages are times of voluntary membership mobility,” when “individuals may leave one type of organization and in turn join others” (Rotolo 2000:1155). Engagement peaks in midlife when people join organizations and volunteer in conjunction with family- and workrelated obligations (Knoke and Thomson, 1977). People move into and out of voluntary associations and volunteer work at various stages in their lives in ways that are connected to other aspects of their lives. Teenagers are involved in youth organizations, and parents participate in Little League, PTAs and other child-related activities (Knoke and Thomson, 1977; Rotolo, 2000). Wives appear to draw their husbands into volunteering, but not vice versa (Rotolo and Wilson, 2006). Other social roles can serve as constraints on volunteering due to a lack of time and the prospect of role overload. Thus, when individuals move out of key social roles like work and active parenthood, the discretionary time they gain might be spent volunteering. Indeed, individuals are more receptive to the idea of 10 Chambre and Einolf Who Volunteers Working Paper – June 2011 volunteering within the first two years after they retire (Caro and Bass, 1997). Although caregiving activities do not lead to reduced volunteering by midlife and older persons (Farkas and Himes, 1987; Gallagher, 1994), women reduce their involvement in volunteering due to family obligations much more than men (Choi, Burr, et al., 2007). Thus, the link between volunteering and other social roles is complex and often contradictory: some social roles provide opportunities, incentives, or even mandates for participation, but the same roles can also reduce volunteering because of time constraints. Prosocial and Value Orientations: A great deal of research has focused on the importance of individual characteristics, including personality traits, motivations and values, that predispose people to engage in a variety of prosocial and altruistic practices, including volunteer work (Clary, Snyder, et. al., 1998; Mowen and Sujan, 2005). Some of the earliest psychological research considered whether certain characteristics were associated with an altruistic personality (Batson et al., 1986; Penner et al., 2005). Recent research has documented that volunteering is associated with several personality characteristics including resilience, extraversion, self efficacy, and low levels of neuroticism (Carlo, Okun, et. al., 2005; Matsuba, Hart, and Atkins, 2007; Okun, Pugliese, et al., 2007). A number of value orientations and motivations differentiate between volunteers and nonvolunteers, including commitment to altruistic values (Wielhe and Isenhour, 1977), commitment to personal charitable behavior and public 11 Chambre and Einolf Who Volunteers Working Paper – June 2011 involvement (Sundeen, 1993), and being more interested in interpersonal expression and growth than in success (Williams, 1986). Volunteers also express greater support for norms of obligation (Schwartz, 1997; Schwartz and Fleishman, 1978). Qualitative interview studies of Holocaust rescuers (Monroe, 1996) and exemplary moral leaders (Colby and Damon, 1992) indicate that highly altruistic people were propelled by a sense of moral obligation toward many people, not just friends and family, a characteristic that Samuel and Pearl Oliner (1988) call “extensivity.” Rossi (2001) and Einolf (2010) found that moral obligation correlated with prosocial action in the domains of family, volunteering, and charitable giving, and Einolf (2010) found that people with extensive moral obligations were more likely to donate time and money to charitable causes. Perry, Brudney, and colleagues (2008), examined how “public service motivation,” a composite measure of prosocial motivation in the workplace, correlates with volunteering. Clearly, a desire to help others without payment shapes the decision to volunteer. Yet it is also clear that pure altruism is rare (Andreoni, 1980) and that a combination of altruism and self interest is common (Gidron, 1983; Van Til, 1985). Midlarsky (1991) observes that individuals themselves derive a number of benefits in the process of helping other people. This view was commonly expressed by AIDS volunteers in the late 1980’s and early 1990’s, who often said that they ‘got’ more than they ‘gave,’ and often found volunteering not only beneficial but transformative (Chambré, 1995, 2006). 12 Chambre and Einolf Who Volunteers Working Paper – June 2011 Religious precepts are also influential. The connection between religiosity and volunteering is well documented (Becker and Dhingra, 2001; Park and Smith, 2000; Janoski, Wilson, and Musick, 1998; Musick and Wilson, 2008), and one explanation of this connection are the moral norms and values which motivate helping behavior, including volunteering (Lee, Piliavin, and Call, 1999; Schervish and Havens, 1997, 2002; Schwartz, 1977; Schwartz and Fleishman, 1978; Wilson, 2000). People who report that they are actively involved in religious organizations and attend services on a regular basis (Hodgkinson, Weitzman and Kirsch, 1990; Wilson and Janoski, 1995) more often volunteer. However, Cnaan, Kasternakis and Wineberg (1993) found that self-defined religiosity did not distinguish between the motivations of volunteers and nonvolunteers. They also found that the strength or importance of people’s religious beliefs were less significant predictors of volunteering than the fact that churchgoers have more extensive social networks and are more likely that a person will be asked to volunteer (Becker and Dhingra, 2001; Park and Smith, 2000). However, a recent analysis using more nuanced measures of subjective religiosity coded from interview data found a link between religious values and volunteering (Einolf 2011). Psychologists influenced by Erik Erikson’s (1980) life stage theory of human development have pointed out that the meaning of volunteering changes over the course of people’s lives, especially as they reach the generative stage of life. This stage begins in middle adulthood, and is marked by a turn away from a focus on one’s self and an increased focus on what one will leave for the next 13 Chambre and Einolf Who Volunteers Working Paper – June 2011 generation. Later theorists connected this change in focus with an increased awareness of mortality, so that people begin to define themselves by what legacy they will leave for the next generation (Kotre, 1984). Generative concern has been associated with a variety of helping behaviors, including volunteering (Rossi 2001). Social psychologists as well as sociologists have pointed out that individuals who actively engage in various forms of prosocial, altruistic or philanthropic practices develop an image of and expectations for themselves as donors of time and money. Lee, Piliavin and Call (1999) explain continued commitment to altruism, blood donation and volunteering in terms of ‘role identity’ theory. A person who volunteers repeatedly may come to think, “I am the kind of person who volunteers,” and eventually, “Volunteering is an important part of who I am.” People might begin volunteering for any number of reasons, but may continue volunteering even after their initial commitment ends because they have assimilated the role of volunteer into their sense of self. Several ethnographers and sociologists offer variants of role identity theory. Allahyari (2000) uses the term ‘moral selving’ to refer to a process in which individuals construct a self image that both promotes and reinforces their involvement in charitable work. Schervish and Havens discuss the concept an “identification theory of care” to describe a moral citizenship and sense of concern about others (Schervish, 2006; Schervish and Havens, 2002). Research on prosocial orientations also considers the impact of socialization into volunteer roles, including parental modeling and participation in 14 Chambre and Einolf Who Volunteers Working Paper – June 2011 community service projects during high school or college (Hart, Donnelly, et al., 2007). Socialization models of volunteering especially focus on the importance of having parental role models and the intergenerational transmission of prosocial attitudes (Hodgkinson, 1995). In their study of the antecedents of public service motivation, Perry, Brudney, and colleagues (2008) found that the most salient influence was parental volunteering, family orientations toward helping strangers, and helping behavior within families. While it is clear that family socialization is critical, the effects of family values appear to be more significant earlier in people’s lives than at later points (Janoski, Musick and Wilson, 1998). Based on three waves of data collection from the Youth-Parent Socialization Panel study, Janoski and Wilson (1995) demonstrate that family orientations influence whether or not their children are engaged in high school activities, the impact of parental modeling diminishes over time, and individuals develop their own values that are only partly influenced by their parents as they grow older. Resource Theories One of the earliest theories of volunteering was “dominant status theory.” Lemon, Palisi and Jacobson’s (1972) study revealed that there was a positive correlation between the voluntary association membership and the number of “dominant statuses” people occupied such as being male, having more education, higher income and more prestigious occupations. This perspective has now been subsumed under resource theories, which specify that individuals are more likely to volunteer when they possess the kinds of skills and resources 15 Chambre and Einolf Who Volunteers Working Paper – June 2011 that promote their involvement. These resources make them attractive to organizations, and hence more likely to be recruited (Wilson and Musick, 1997; Yörük, 2006). In addition, people who have a surplus of the key ingredient involved in volunteering – time – are also more likely to volunteer. Conceptualizing the decision to volunteer in terms of rational choice theory, Musick and Wilson (2008:113) point out that “volunteering is more attractive to the resource-rich than to the resource-poor. If volunteer work demands money, the rich will find it easier to do; if it demands knowledge and ‘civic skills,’ the well educated will be less challenged by it… In other words, the resource-rich are more likely to ‘profit’ from doing volunteer work.” There is considerable support for this perspective. Numerous studies point out that human capital variables are powerful predictors of volunteer participation (Chambré, 1987; Musick and Wilson, 2008). Those with higher levels of human capital, as measured by education and occupation, are far more likely to volunteer than those with more modest education and limited occupational skills. Musick and Wilson (2008) point out, however, that people with higher levels of human capital are also more likely to volunteer because they are more often asked to volunteer. Recent economic research casts some doubt on resource theory. Since there is a tradeoff between time spent working for pay and time spent working for free, people with lower wages would be expected to volunteer more than people who earn higher wages. While economists view this as “standard labor supply substitution behavior,” it turns out that wages explain “only a minor part of 16 Chambre and Einolf Who Volunteers Working Paper – June 2011 differences in volunteer activity among individuals with similar demographic characteristics” (Freeman, 1997). One exception seems to be new retirees, for whom volunteering is higher among those with lower preretirement wages (Moen and Fields, 2002). While nonvolunteers most often cite a lack of time as the major reason for not being involved in volunteer work (Sundeen, 2007), there does not appear to be a tradeoff in time spent working versus time spent volunteering. Among people of all ages, and particularly among older persons, there is little evidence that when people reduce their work commitment, they use the free time they gain to volunteer. Among older persons, who have reduced work and family obligations, volunteer participation is higher among those who continue to work than for homemakers and retirees regardless of age (Chambré, 1987). There is also no support for the idea that volunteering tends to be more common when people retire and claim that they miss working. Data from a 1981 national survey of older persons revealed that “people who miss the structure imposed by work, the interpersonal relationships emerging in a work setting, the feeling of being useful, and the respect derived from working actually volunteered less often than people who indicated they did not miss these things” (Chambré, 1987:29). Even when age and health are introduced as controls, working less is not associated with volunteering more. Once a person does volunteer, however, the amount of time devoted to unpaid work is greater when they work part time or they are retired than if they are work on a full time basis (Chambré, 1984, 1987; Musick and Wilson, 2008). 17 Chambre and Einolf Who Volunteers Working Paper – June 2011 While volunteer rates are higher among women who are out of the paid labor force (Rotolo and Wilson, 2007), it is not so clear that this is because they have free time. Three studies of elite women found no support for the idea that they viewed volunteer work as an unpaid job, nor are there significant differences between the motivations expressed by women volunteers who were working and those who were not (Markham and Bonjean, 1996). Kaminer’s study of Smith College graduates (1984:197) observed that volunteering was “simply something ‘extra’: it supplements instead of substituting for a paid job.” Daniels (1988) reached a similar conclusion, noting that “they do the work because they enjoy it, not because they have to.” Resource theories point to an important dynamic: the recursive relationship between volunteers and the organizations they serve. Individuals bring skills, knowledge and cultural capital to their work, and organizations select individuals who will be a good “fit.” Individuals with high levels of human capital may be more attractive especially for human service and religious volunteer positions. Those with high levels of social capital have the networks which both inform and recruit them to become involved. Cultural capital is also important because of the knowledge of the work setting and the norms of dominant social institutions. Models of Volunteering Several teams of scholars have developed empirical models of volunteering that combine several sets of causal factors to examine their 18 Chambre and Einolf Who Volunteers Working Paper – June 2011 interrelationship and relative influence on volunteering. The earliest of these (Chambré, 1987) indicates that social and demographic characteristics (race, religion, gender, marital status and age) influence two measures of resources (income and education) as well as health. These variables influence life satisfaction and an overall level of social engagement, which are the most salient direct influences on whether or not older persons in the sample volunteered. A second model, based on a sample of older persons (Herzog and Morgan, 1993), analyzes the influence of a series of demographic, socioeconomic, contextual, social role, social engagement and personality variables. They build a conceptual model of volunteering which includes three sets of exogenous factors (environmental, social structural and personality), which influence social roles, resources and lifestyle measures, which directly influence volunteer status. In a series of articles with a number of different collaborators, John Wilson draws on several different surveys, including Americans’ Changing Lives and the Youth-Parent Socialization Study, to develop models of involvement in volunteer work and attachment to volunteering. Using the study of youth and their parents, Janoski, Musick and Wilson (1998) found support for Smith’s General Activity model in the longitudinal Youth-Parent Socialization Study, as the strongest direct influence on whether or not a person volunteered in 1982 was whether or not they volunteered in 1973, which in turn was most influenced by whether they volunteered in 1965. While attitudes about tolerance, passive or active citizenship, and political efficacy in 1965 had a major impact on whether or not 19 Chambre and Einolf Who Volunteers Working Paper – June 2011 they volunteered in 1973, the link between attitudes held in 1973 and volunteer status in 1982 was significant but weak. Wilson and Musick’s (1997) article “Who Cares? Toward an Integrated Theory of Volunteer Work” develops an empirical model of volunteering that includes a relatively broad range of variables. These include background demographic variables (gender, race and age), measures of socioeconomic status (income and education), and measures of resources, religiosity, human capital, social capital and cultural capital. The strongest direct influences on volunteering were religiosity and number of children. The model explains a substantial amount of the variance in volunteering, with an R-squared value of .426. However, the measures of various forms of capital diverge from common definitions: income and health are used as measures of human capital, number of children is a proxy for social capital, and church attendance, attitudes toward helping and the use of prayer are measures of cultural capital. Drawing on 1995 data from the Midlife in the United States study, Matsuba, Hart and Atkins (2007) develop a three stage path model that includes personality factors, gender, age, education and income as exogenous variables, which influence civic obligation, helping identity, and opportunity to volunteer. The major factor influencing volunteering is opportunity (which includes institutions and relationships) and a measure of identity. A structural model, based on a study of exemplary volunteers who won Points of Light awards, includes formal volunteering as part of a model of interrelated factors rather than the dependent variable, since the focus was to 20 Chambre and Einolf Who Volunteers Working Paper – June 2011 explain public service motivation (Perry, Brudney, et al., 2008). The model indicates that the strongest influences on formal volunteering are religious activity, youth volunteering and being female. Other variables, including family socialization, income and education, were not significant. With the exception of this last model, all of them are multi-stage path models where measures of social context, demographic, socio-economic status, personality and values are exogeneous variables, which have an indirect effect via mediating factors such as social integration, social capital and social roles. Thus, for example, a study of extraversion and volunteering among older persons reaches the conclusion that extraverted people volunteer because they are more actively engaged in a host of social activities (Okun, Pugliese and Rook, 2007). However, most of these studies fail to include the R-squared value of the model, and hence provide no sense of their models’ explanatory power. Finally, Bekkers and Wiepking’s (2011) literature review on charitable giving is similar to the current article, as it divides causes into broad theoretical categories. Bekkers and Wiepking identify eight causal mechanisms for charitable giving: awareness of need, solicitation, costs and benefits, altruism, reputation, psychological benefits, values, and efficacy. Our category of motivations and prosocial value orientations corresponds to Bekkers and Wiepking’s categories of altruism, psychological benefits, and values. Our category of resources relates to the authors’ discussion of the material costs and benefits of giving. Social context, roles, and networks increase awareness of 21 Chambre and Einolf Who Volunteers Working Paper – June 2011 need, and provide the context within which volunteers attempt to enhance their reputations. In conclusion, fifty years of research on volunteering have provided researchers with a wealth of empirical data and a number of theories to make sense of these data. However, most scholars work within a single academic discipline and apply only a few theories from their own discipline. Our paper brings these theories together under three categories: social context, roles, and networks, prosocial and value orientations, and resources. The next section describes how these three traditions can be combined into a single hybrid model and tested empirically. Toward a Hybrid Theory of Volunteering There are several ways to empirically test these three theories and construct a hybrid theory. . One way is to consider the three traditions as alternative explanations, which leads to our first research question: Which of the three theories is the most explanatory? A second approach is to view them as complementary, providing different pathways to volunteering. Adopting this approach, we ask which combination of variables best predicts volunteering. A final question examines the relationship between theories and variables. Many variables commonly studied as predictors of volunteering actually measure concepts from more than one theory, leading to unexpected empirical results. By carefully mapping variables to theories, and accounting for when theories work 22 Chambre and Einolf Who Volunteers Working Paper – June 2011 for or against one another, we can clarify some confusing but often observed empirical results. Where variables measure concepts from more than one theory, the theories may either work together to encourage volunteering, or against each other to produce little net result. Education is a good example of how a single variable can measure concepts from more than one theoretical tradition, resulting in very strong net effects. One can view education as a resource, giving people skills for volunteering (Wilson and Musick, 1997). But education also teaches civic values, making it a type of prosocial value orientation; education brings people into social networks, and educated people are more likely to take on professional roles where volunteer work is expected. As education works across all three theoretical traditions, it is not surprising that studies consistently find it to be a very strong predictor of volunteering. Other variables measure a positive effect of one theoretical tradition but a negative effect of another. For example, when people retire from full time work, they gain in the resource of free time, but lose the social roles and networks that come with full-time employment. Similarly, the arrival of children brings parents into new social networks and creates social role expectations, but also reduces their amount of free time. One would therefore expect the net effect of retirement and having young children on volunteering to be small, and it would not be clear whether the direction would be positive or negative. This study does not attempt to create a path model, as Chambre (1987) and Wilson and Musick (1997) did in earlier work, as the causal relationships 23 Chambre and Einolf Who Volunteers Working Paper – June 2011 among variables in each category are probably reciprocal. For example, education (a resource) may draw an individual into a particular profession (social role), but work in that profession may in turn develop skills valued in volunteering (resource). Prosocial values may encourage a person to attend religious services, which in turn may reinforce prosocial values. Accurately tracking these causal relationships would not be possible with the data used in this study. This study offers a preliminary test of the three theories by operationalizing each theory with several variables, and testing the ability of these variables to predict variation in volunteering. It asks whether we can combine elements from all three traditions to formulate a single predictive model. DATA AND METHODS To test our hybrid theory, we used data from the 1995 wave of the Midlife in the United States (MIDUS) survey. This survey is random and nationally representative, uses a large sample, studies individuals in a broad age range, and includes variables that measure concepts from all three theoretical traditions. The MIDUS study used written surveys and telephone interviews with a nationally representative random-digit dialing sample of 3,032 noninstitutionalized, English-speaking adults, born between 1920 and 1970. The estimated overall response rate to the first wave was 60.8% and the data are weighted to adjust for nonresponse.1 Dependent variable: Volunteer status 24 Chambre and Einolf Who Volunteers Working Paper – June 2011 The MIDUS survey asked respondents to write in how many hours they spend volunteering each month. While the survey does not define volunteering, it prompts respondents with questions about volunteering for health, medical, youth, and educational organizations. About a third of respondents, or 36.8%, stated that they volunteered in a typical month. Among those who did volunteer, the mean hours per month spent volunteering were 14.4, the median hours were 8.0, and the standard deviation was 20.5 (Table 2). The variable was skewed to the right, with a small number of respondents contributing a large amount of volunteer time. [Table 2 here] Independent variables Demographic variables: The MIDUS sample was 43.5% male, 11.2% African-American, 1.0% Asian-American, and 2.6% Latino. The average age of the respondents was 45.3 years old. We use a quadratic term for age in regression analysis, as prior studies of volunteering find that age has a curvilinear relationship with volunteering, increasing through middle age and declining late in life. Social context: To measure social context properly, one would want information about levels of volunteering, social capital, and nonprofit activity in each respondent’s neighborhood, city, and state. The MIDUS survey does not have such data, meaning that the data do not allow us to measure social context 25 Chambre and Einolf Who Volunteers Working Paper – June 2011 directly. However, the survey does have a measure of neighborhood safety and quality originally designed by Keyes (1998; Keyes and Shapiro, 2004). This scale consists of four statements, “I feel safe being out alone in my neighborhood during the daytime,” “I feel safe being out alone in my neighborhood at night,” “I could call on a neighbor for help if I needed it,” and “People in my neighborhood trust each other.” Social roles: Labor force status, family status, and participation in religious institutions and voluntary associations bring with them social roles that encourage volunteering, but also increase social integration, making it difficult to disaggregate the two effects. We consider marital status to be an exception – being married is a social role that Social integration: The MIDUS survey uses measures of social integration and social contribution originally designed by Keyes (1998; Keyes and Shapiro, 2004). The social integration measure consists of three agree/disagree statements, “I don’t feel I belong to anything I’d call a community” (reverse coded), “I feel close to other people in my community,” and “my community is a source of comfort.” The social contribution measure is also three statements, “I have something valuable to give to the world,” “My daily activities do not create anything worthwhile for my community” (reverse coded), and “I have nothing important to contribute to society” (reverse coded). Finally, MIDUS had two questions about social interactions with neighbors, one that asked how often they had any contact, “even as simple as saying hello,” and another that asked how often they “have a real conversation or get together socially.” 26 Chambre and Einolf Who Volunteers Working Paper – June 2011 Prosocial and value orientations: The MIDUS survey contains many psychological scales measuring prosocial personality traits and value orientations. Of these, this study used measures of generative concern, moral obligation, subjective religiosity, and prosocial role identity. MIDUS incorporated six items from the Loyola Generativity Scale (McAdams and de St. Aubin, 1992) which measures a respondent’s level of concern for the next generation. The survey asked respondents to describe how much six statements apply to them, such as “Many people come to you for advice,” and “You have had a good influence on the lives of many people.” MIDUS has nineteen questions that asked respondents to rate how obligated they would feel to help individuals or perform a task for the benefit of the community. Examples include how obligated the respondent would feel “to drop plans when your children seem very troubled,” “to do more than most people would do on your kind of job,” and “to volunteer time or money to social causes you support.” We used both the single-item measure of obligation to volunteer time and moneyand the average of all nineteen questions. We used four questions about how religious and how spiritual the respondents are, and how important religion and spirituality are in their lives, to make a single measure of subjective religiosity. We measured prosocial role identity through a question that asked respondents to “rate your contribution to the welfare and well-being of other people” over the course of their lives. We measured volunteer role identity through a question that asked whether the respondent expected to volunteer 15 or more hours per week 10 years from now. 27 Chambre and Einolf Who Volunteers Working Paper – June 2011 Resources: Measures of work skills include the prestige of respondents’ occupations and household income. Education is also a measure of skills, and labor force status (full-time, part-time, or not working) and a dummy variable measuring the presence of minor children serve as measures of free time. Education, labor force participation, and the presence of children embody other paradigms as well, and are discussed in the next section. Multiple paradigms: Ten variables measure concepts related to more than one paradigm, with four measuring concepts that work together and six measuring concepts that work at cross-purposes. Education is a resource and also facilitates participation in social networks. Religious services attendance, religious meeting attendance, and attendance at meetings of voluntary associations build social networks and provide opportunities to take on prosocial roles, and also encourage prosocial motives through the internalization of external norms. Three variables related to employment status and three related to children measured paradigms that affected volunteering in conflicting ways. Employment can promote volunteering through the social networks and skills that come with it, but can also discourage it due to the demands paid work places on individuals’ time. The presence of children in the household can encourage volunteering through increased social networks and the adoption of the social role of parent, but can also discourage volunteering through the demands children make on parents’ free time. Method of Analysis 28 Chambre and Einolf Who Volunteers Working Paper – June 2011 Because the dependent variable (hours volunteered) is not normally distributed, we used logistic regression in our analysis, and converted the volunteering measure into a binary variable with 0 = no volunteering and 1 = any volunteering. In reporting the logistic results, we give the log of the odds ratio for each independent variable rather than the slope coefficient. Estimates of the predictive power of each regression model are estimated using the Nagelkerke calculation of pseudo-R squared (Nagelkerke, 1991). FINDINGS: Multivariate regression (Table 3) provides the answer to our first research question, which theoretical tradition best contributes to our ability to predict participation in volunteering. Demographic controls alone (Model 1) explained very little of the variation in decisions to the likelihood of being a volunteer (Nagelkerke pseudo R-squared = .013). The resource variables (Model 2) explained 13.6% of the variation in decisions to volunteer, prosocial and value orientation measures (Model 3) explained 28.4% of the variation, and the social context, network, and roles variables (Model 4) explained the highest proportion of variation, 34.9%. The second research question, how well a model combining all three traditions would predict volunteering, is answered by Models 5 and 6. Model 5 presents the results of a regression equation containing all the variables in the study, with a pseudo R-squared value of .407. We then removed variables one at a time, starting with the ones that were non-significant in the full model, to obtain a parsimonious model. Model 6 contains only eight variables, obligation to 29 Chambre and Einolf Who Volunteers Working Paper – June 2011 volunteer, volunteer role identity, education, religious services attendance, voluntary association attendance, full-time employment, children aged 7-13, and children aged 14-17, but predicts 36.1% of the variation in participation in volunteering. Bivariate regression (Table 4) answers our third question, whether variables that measure concepts from more than one theory will have greater or lesser explanatory power. Mixed support was found for the idea that variables that measured concepts from more than one theoretical tradition would better predict volunteering than variables that measured only one. If one adopts a Nagelkerke pseudo R squared value of .05 as a rough measure of strong association, education (pseudo- R2 = .072), religious services attendance (R2 = .076), religious meeting attendance (R2 = .066) were over this threshold. However, a number of variables measuring concepts from only one theoretical tradition were also over this threshold, including generative concern (R2 = .067), expected future volunteering (R2 = .081), social contribution (R2 = .113), social integration (R2 = .089), and voluntary association attendance (R2 = .126). Stronger support was found for the hypothesis that competing effects measured in a single variable might cancel each other out. Full-time employment had only a marginal negative effect on volunteering (R2 = .002), and retirement had no significant positive effect. As expected, the negative effect of reduced free time for full-time workers was counteracted by the positive effect of social networks that come with employment, and the reverse seems to be true of retirement. Part-time workers, who possess both time and work-based social 30 Chambre and Einolf Who Volunteers Working Paper – June 2011 networks, volunteer significantly more than either group (R2 = .008). While the presence of children in elementary and middle school (R2 = .025) and high school (R2 =.009) made it more likely that people would volunteer, having preschool aged children had no effect on the likelihood of volunteering. In this case, the positive effect of the social networks that come with having children seems to be canceled out by the extensive demands that young children place on parents’ time. DISCUSSION AND CONCLUSION This paper classified existing theories of volunteering into three traditions: social context, roles, and integration, prosocial value orientations, and resources. We used bivariate and multivariate regression analysis to find that all variables from each tradition predicted volunteering, and we combined variables from the all three theoretical traditions to construct a hybrid model. The most predictive variables were those measuring social context, roles, and integration, followed by measures of values, and then measures of resources. Combining variables from all three traditions with demographic controls predicted 40.7% of the variation in volunteering. A parsimonious model with eight variables from the three traditions predicted 36.1% of the variation in volunteering. We predicted that variables measuring concepts from more than one theoretical tradition would be particularly powerful predictors of volunteering. These variables were education (resources, value orientations, and social roles and networks), and attendance at religious services and meetings (value 31 Chambre and Einolf Who Volunteers Working Paper – June 2011 orientations and social networks). While such variables were strong predictors of volunteering, they were no stronger than some of the variables that drew upon only one theoretical tradition. On the other hand, variables that measured positive effects from one theory and negative effects from another did have small or zero effects, as predicted. As predicted, full-time employment had no significant effect on volunteering, as it corresponds to two paradigms which cancel one another out: the positive effect of social roles and integration that come with employment, and the negative effect of scarcity in the resource of free time. Similar results were found for retirement (increased resource of free time, but decrease in social roles and integration), and having pre-school children (increase in social roles and integration, but decrease in free time). Some limitations in the data made a full test of the three traditions theory impossible. The MIDUS data set only had one variable for social context, which measured respondents’ subjective opinions of neighborhoods, thus conflating respondents’ psychological characteristics and the actual characteristics of their neighborhoods. Future research should use data sets that include measures of volunteer participation, nonprofit density, and social capital in the community where the respondent resides. Another limitation exists with the measures of resources and social integration. Most variables that measured one of these theoretical traditions also measured one or more other traditions, making it difficult to disaggregate the effect of each separate tradition. Future studies could 32 Chambre and Einolf Who Volunteers Working Paper – June 2011 avoid these problems through careful survey design, and some suggestions for such design are included below. CONCLUSION The hybrid three traditions theory expands both theoretically and methodologically upon earlier comprehensive theories of volunteering. The three traditions paradigm goes beyond Wilson and Musick’s (1997) division of the causes of volunteering into human capital, social capital, and cultural capital, by disaggregating social capital into social context, social roles, and social integration. The model helps researchers separate variables from theories, and predicts that variables that simultaneously measure concepts from multiple theories may have larger or smaller than expected effects on volunteering. Space considerations make it impossible to fully test this implication of the theories, but these implications can be tested in future research. Methodologically, the test of the three traditions model goes beyond earlier tests by using a broader array of variables, and by clarifying how variables can correspond to more than one theory. For researchers, the value of the three traditions model is that it helps clarify some longstanding empirical findings on the correlates of volunteering. For example, researchers have long known that education is a powerful predictor of volunteering. The five paradigms model shows that the reason for its strength is the fact that the education variable measures concepts corresponding to all three traditions: values, resources, and social roles and integration. Similarly, 33 Chambre and Einolf Who Volunteers Working Paper – June 2011 researchers who think of retirement as a transition that only adds to people’s free time neglect the fact that withdrawal from the labor force reduces the social roles and integration that encourage volunteering. Viewing retirement through the lens of multiple theories explains why retirement has little overall effect on volunteer participation. The three traditions theory suggests several avenues for future research. The first avenue is methodological, as the theory suggests that many of the variables commonly used in surveys actually measure multiple theories and should be disaggregated for better accuracy. For example, education is often taken as a measure of skills, but education is also a proxy measure for social integration and prosocial values. Future surveys should find a way to separate these three effects. For social integration and social roles, future surveys should distinguish between activities that merely bring people into contact with others from activities that also assign roles to individuals where volunteering is expected. For example, all voluntary associations create situations where members encounter other people, but only some associations also expect their members to volunteer. The three traditions model would predict that the latter type of organization would have a more powerful association with volunteering than the former. In addition to its value to research, the three traditions model has practical implications for policy makers and volunteer managers. Our comparative test of the three traditions shows that social context, roles, and integration are the best predictor of volunteering, with a higher R-squared than prosocial value 34 Chambre and Einolf Who Volunteers Working Paper – June 2011 orientations and a much higher R-squared than resources. This is good news for volunteer managers. They will not have to read the minds of potential volunteers to look for prosocial values, or read their bank statements to ascertain their income. Easily observable social behaviors, such as religious participation, social interaction, and voluntary association membership, are the best predictors of willingness to volunteer. A second use of the three traditions theory relates to encouraging volunteer work among retirees. People gain free time when they retire, but lose the social roles and networks that come with employment, so that retirement has little net effect on volunteering. Volunteer managers can concentrate on other social networks to recruit retired volunteers, and emphasize the meaningful and productive nature of volunteering to create a replacement social role for people who have lost their roles as paid workers. Retirees also lose the social networks that came with employment, and retirees who move to a new home may lose all of their social networks as well as the social context that originally encouraged them to volunteer. Taking advantage of the social context of retirement communities to encourage networks that hold norms of volunteering may help compensate for this loss of networks and context.. Of particular use to program managers and policy makers may be the division of Wilson and Musick’s social capital category into social context, roles, and networks, as managers can use all three to promote volunteering. Any type of social contact increases the likelihood of volunteering, as each additional friend or acquaintance is an additional person who may ask an individual to 35 Chambre and Einolf Who Volunteers Working Paper – June 2011 volunteer. However, some types of social contact also include social roles and contexts that encourage volunteering. By adding pro-volunteering roles and contexts to existing social networks, programs may encourage volunteering among people who had not previously considered it. A performing arts company, for example, may encourage regular attendees at performances to change the conception of their own role from passive onlooker to volunteer, by calling them “members” or “patrons” and establishing normative expectations for them. As this idea takes hold, existing patrons may encourage new attendees to also take on the role of volunteer, turning the performing arts organization into a context that encourages volunteering. Finally, volunteers encourage other members from their social network to join, first as audience members and then as patrons and volunteers. In conclusion, we have constructed an integrated theory that explains why some individuals engage in volunteering and others do not. Our data indicate that demographic characteristics alone have little far less influence than values and social integration. Having surplus resources, especially time, is significant but less important than other factors. Our theory specifies that volunteering is positively influenced by a combination of cultural and social components. 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Perspectives on Productive Aging, Number 1. http://www.urban.org/UploadedPDF/311201_Perspectives1.pdf accessed on 4 August 2009. 52 Chambre and Einolf Who Volunteers Working Paper – June 2011 Table 1: Summary of Three Theoretical Traditions Name Theory Empirical Evidence Social context Volunteers mobilize in March of Dimes volunteers response to emergencies 19th century Friendly Visitors and salient social issues AIDS volunteers and are affected by Variations by state, province or neighborhoods and county cultures of generosity Nonprofit density increases volunteering Racial and ethnic diversity decrease voluntary association Social Volunteers are more integration involved in numerous membership social and organizational Volunteers have higher levels of activities engagement in numerous social, voluntary and leisure activities Levels of social capital are the strongest direct predictors of Social roles volunteering Other social roles are pathways into and Volunteering is a spillover of other constraints on volunteering social roles: age and lifecycle 53 Chambre and Einolf Who Volunteers Working Paper – June 2011 effects Contradictory findings regarding volunteering and other role obligations Prosocial and Motivations, values and Personality: agreeableness, value personality characteristics agency, empathic concern, orientations influence volunteering. extraversion, conscientiousness, low neuroticism Values: altruism, obligation, religiosity, generative concern Salient role identity Family socialization Resource Individuals with higher Education, skills, and free time resources are more likely to volunteer and more likely to be recruited to volunteer 54 Chambre and Einolf Who Volunteers Working Paper – June 2011 Table 2. Descriptive statistics Variable Range Mean or % Standard Cronbach’s yes deviation alpha Dependent variable: Volunteering (yes/no) 0-1 36.8% n/a n/a Volunteering (hours/month, 0-120 14.4 20.5 n/a Male 0-1 43.5% n/a n/a Black 0-1 11.2% n/a n/a Asian 0-1 1.0% n/a n/a Latino 0-1 2.6% n/a n/a Age 25-74 45.3 13.5 n/a 1-4 3.4 0.6 .68 1-4 2.8 0.6 .84 among those who do volunteer) Demographics: Social context: Neighborhood safety and quality Prosocial and value orientation: Generative concern 55 Chambre and Einolf Who Volunteers Working Paper – June 2011 Obligation to volunteer 0-10 6.3 2.6 n/a Obligation overall 0-10 7.2 1.4 .88 Subjective religiosity 1-4 2.8 0.7 .87 Role identity (lifetime 1-5 3.8 0.9 n/a 0-1 27.5% n/a n/a Occupational prestige 8-90 36.7 13.6 n/a Income (in thousands) 0-250 0-1 68.2% n/a n/a Social contribution 3-21 15.2 3.8 .67 Social integration 3-21 13.8 4.3 .73 Informal socializing with 1-6 4.0 1.3 n/a contribution to others) Role identity (expectation of high current volunteering) Resources: Social role: Marriage Social integration: neighbors Multiple paradigms – all positive predicted effects 56 Chambre and Einolf Who Volunteers Working Paper – June 2011 Education 1-12 6.2 2.4 n/a Religious services attendance 0-15 2.3 3.1 n/a Religious meeting attendance 0-10 0.8 1.8 n/a Voluntary association 0-15 2.1 3.5 n/a Part-time employed 0-1 13.5% n/a n/a Full-time employed 0-1 60.7% n/a n/a Retired 0-1 14.1% n/a n/a Children aged 0-5 0-1 19.4% n/a n/a Children aged 6-12 0-1 25.6% n/a n/a Children aged 13-17 0-1 18.2% n/a n/a attendance Multiple paradigms – positive and negative predicted effects 57 Chambre and Einolf Who Volunteers Working Paper – June 2011 Table 3: Multivariate logistic regression results Variable Model 1 Model 2 Model 3 Model 4 Model 5 Model 6 Demographics: Demogr Resource Values Social Full Parsim aphics measur model on-ious s only Male .820* es .746*** .959 .733** model .848 -- .547** -- * Black .843 .960 .511** .681* * * Asian .980 .769 ,730 .660 .610 -- Latino .539* .554* .407** .496* .415** -- Age 1.078* 1.049^ 1.067* 1.063* 1.059^ -- .999* .999^ -- ** Age2 .999** * 1.000 .999** * Resources: Occupational prestige 1.013*** 1.010* -- Income 1.001 .999 -- 1.163 -- Prosocial value orientation: Generative concern 1.405* 58 Chambre and Einolf Who Volunteers Working Paper – June 2011 ** Obligation to 1.255* 1.228* 1.280* volunteer ** ** ** Subjective religiosity .935 .981 -- Role identity (lifetime 1.048 1.011 -- Role identity (high 2.111* 2.106* 2.080* future volunteering) ** ** ** 1.236* 1.203^ -- 1.162 1.317* -- 1.102* 1.047* -- ** * 1.052* 1.041* ** * Informal socializing 1.119* 1.083^ with neighbors * contribution) Social context: Neighborhood safety and quality Social role: Marriage Social integration: Social contribution Social integration -- -- 59 Chambre and Einolf Who Volunteers Working Paper – June 2011 Multiple paradigms – positive predicted effects Education 1.206*** 1.169** 1.180** 1.148* 1.213* * * ** ** Religious services 1.116* 1.099* 1.087* 1.142* attendance ** ** ** ** Religious meeting 1.134* 1.168* 1.129* -- attendance ** ** ** Voluntary association 1.181* 1.174* 1.199* attendance ** ** ** Multiple paradigms – positive and negative predicted effects Part-time employed 1.359* 1.293 1.380^ -- Full-time employed .811^ .713* .717* .580** * Retired 1.462* 1.343 1.293 -- Children 0-6 1.036 .983 1.080 -- Children 7-13 2.151*** 2.352* 2.541* 2.388* ** ** ** 60 Chambre and Einolf Who Volunteers Working Paper – June 2011 Children 14-17 Constant 1.484*** .135** .029*** * 1.372* 1.524* 1.496* ** ** .003** .002** .000** .013** * * * * N 3004 3002 2930 2939 2911 3029 % Predicted (base) 63.1 63.1 62.5 62.3 62.2 63.2 % Predicted (model) 63.1 67.5 72.6 74.9 77.1 75.2 - 2 Log Likelihood 3928.9 3639.6 3201.3 3027.6 2830.1 3058.9 Total R2: .013 .136 .284 .349 .407 .361 ^ p ≤ .10 * p ≤ .05 ** p ≤ .01 *** p ≤ .001 61 Chambre and Einolf Who Volunteers Working Paper – June 2011 Table 4: Bivariate logistic regression results Volunteering Exp(B) R2 Male .836* .002 Black .857 .001 Asian .985 .000 Latino .531* .003 Age .997 .000 Age + 1.077** .006 Age2 * Variable Demographics: .999*** Social context: Neighborhood safety and quality 1.836** .033 * Prosocial and value orientation: Generative concern 2.176** .067 * Obligation to volunteer 1.334** .131 * Subjective religiosity 1.624** .037 62 Chambre and Einolf Who Volunteers Working Paper – June 2011 * Role identity (lifetime contribution to 1.305** others) * Role identity (expected future 3.101** volunteering) * .017 .081 Resources: Occupational prestige 1.028** .044 * Income 1.004** .014 * Social role: Marriage 1.472** .010 * Social integration: Social contribution 1.188** .113 * Social integration 1.141** .089 * Informal socializing with neighbors 1.288** .031 * 63 Chambre and Einolf Who Volunteers Working Paper – June 2011 Voluntary association attendance 1.216** .126 * Multiple paradigms - complementary effects Education 1.225** .072 * Religious services attendance 1.177** .076 * Religious meeting attendance 1.300** .066 * Multiple paradigms – competing effects Part-time employed 1.567** .008 * Full-time employed .865^ .002 Retired 1.032 .000 Children 0-6 1.061 .000 Children 7-13 1.875** .025 * Children 14-17 1.526** .009 * ^ p ≤ .10 * p ≤ .05 ** p ≤ .01 *** p ≤ .001 64 Chambre and Einolf Who Volunteers Working Paper – June 2011 1 Full information about the sample, response rate, weighting, and survey design are contained in the MIDUS codebook, available from the MIDUS website at midmac.med.harvard.edu/research.html. 65
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