Article Voter Ideology, Economic Factors, and State and Local Tax Progressivity Public Finance Review 41(2) 177-202 ª The Author(s) 2013 Reprints and permission: sagepub.com/journalsPermissions.nav DOI: 10.1177/1091142112467528 pfr.sagepub.com John M. Foster1 Abstract This study examines the relationship between voter ideology and the distribution of tax burdens across income groups using state and local data, aggregated at the state level, for 1995, 2002, and 2007. I find that average voter liberalism is positively related to subnational tax progressivity. However, the effects are economically insignificant. A state’s ethnic demographic context appears to be more important. The ethnic congruence between the poor and the nonpoor is positively related to progressivity and the effects are economically significant. The tension between ethnic groups, measured with an index of residential segregation, is inversely related to progressivity. The effects are larger in magnitude than those of average voter liberalism. It is possible that the ethnic demographic context reflects aspects of voter preferences that are not captured by measures of voter ideology. 1 James W. Martin School of Public Policy and Administration, University of Kentucky, Lexington, KY, USA Corresponding Author: John M. Foster, James W. Martin School of Public Policy and Administration, University of Kentucky, 405 Patterson Office Tower, Lexington, KY 40506, USA. Email: [email protected] Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 178 Public Finance Review 41(2) Keywords ideology, tax progressivity, fiscal federalism State and local taxes are important in magnitude. In 2007, state and local tax revenue constituted approximately 11 percent of total personal income. Many scholars, policy makers, and commentators argue that combined federal, state, and local tax burdens should be allocated across households according to their ability to pay or that tax systems should be ‘‘progressive.’’ Conventional public finance theory posits that redistribution should be carried out primarily by the federal government for two reasons: first, there may be national spillovers in the benefits for altruistic voters; second, redistribution carried out at the state or local level could prompt the in-migration of poor households and out-migration of the rich.1 While the federal system is generally recognized as progressive, a few states have complemented the progressive federal income tax with progressive tax systems of their own. On average, across all states, however, low-income households pay a larger share of their income in state and local taxes than do wealthy households. In other words, state and local tax systems tend to be regressive, although there is significant variation in the degree of regressivity. One way to measure progressivity is to take the ratio between the average tax rate faced by a state’s top income quintile and that faced by its bottom quintile. According to this measure, the most progressive state and local tax system (New York) was more than three times as progressive as the least (Washington) in 2007. Differences in the tax policies adopted by governments reflect differences in priorities and economic circumstances. Policy makers have to compete for office. State and local tax policy, therefore, is likely to be shaped by voter preferences, among other factors. These tax policy preferences of voters may be shaped by their narrow financial interests and their conceptions of economic justice. The latter are likely to be grounded in established ideologies. Past studies on state and local tax progressivity have used measures of voter ideology as an explanatory variable, but the measures utilized either did not account for change in the electorate’s ideological orientation over time or failed to account for differences in the intensity of an electorate’s liberalism, along with other limitations. The models estimated in this study used the measure of the average voter’s liberalism developed by Berry et al. (1998). The analysis utilizes state and local incidence data on the forty-eight contiguous states for 1995, 2002, and 2007. I find that average voter liberalism is positively Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 179 related to state and local tax progressivity. However, the impact is small in magnitude. A state’s ethnic demographic context has statistically and economically significant effects on the progressivity of the tax structures utilized by state and local governments. Holding other relevant factors constant, state and local tax structures appear to be more progressive in states in which the poor and nonpoor tend to be of the same ethnicity. The tension between ethnic groups, measured with an index of ethnic residential segregation, is inversely related to progressivity. The effects of these variables are considerably larger than that of the average voter’s liberalism even with the latter variable held constant. This suggests that the ethnic congruence between the poor and the nonpoor and the amiability of relations between ethnic groups reflect components of voter preferences that may not be captured by measures of general voter ideology. This is the first study to examine the association between ethnic residential segregation and state and local tax progressivity. State and Local Tax Structure and Progressivity The progressivity of a government’s tax system is determined by its mix of tax instruments and its rates assigned to each base. The burden of some taxes, such as the personal income tax, can be adjusted based on the characteristics of the taxpayer and, thereby, can be made progressive. On the other hand, it is difficult to adjust the burdens imposed by general sales and excise taxes so these taxes tend to be regressive.2 Property taxes could perhaps be made progressive, but they tend to be regressive in practice. Of course, lifetime incidence is different from incidence in terms of annual income. Metcalf (1994) finds that the regressivity of consumption taxes and the progressivity of income taxes are lower from the standpoint of lifetime incidence than when measured annually. The estimates of incidence utilized in this article are based on the latter.3 In 2007, state and local governments derived about 23 percent of their tax revenue from the personal income tax, 34 percent from sales and excise taxes, and 30 percent from property taxes. Local governments, alone, obtained around 72 percent of their tax revenue from property taxes. Because of the high degree of reliance on sales and excise taxes by most state governments and the high degree of reliance on property taxes by most local governments, state and local tax systems tend to be regressive on average. In 2007, the average tax rate paid by the top-income quintile was around 74 percent of that borne by the bottom quintile, on average. There is, Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 180 Public Finance Review 41(2) however, substantial variation across states. The standard deviation (SD) of this percentage is equal to about 30 percent of the mean. The progressivity of state and local tax structures in terms of annual income is determined by reliance on income taxes relative to consumption and property taxes as well as the structure of the income tax that is utilized. The states with the most progressive tax systems are those which rely heavily on the personal income tax. Those with the most progressive income tax systems have a relatively large number of tax brackets, impose relatively high marginal tax rates on the top income bracket, and utilize low-income tax credits. The exemption of food from the sales tax tends to reduce the regressivity of the sales tax (Institute on Taxation and Economic Policy 2009). Conceptual Framework and Previous Empirical Research Some voters may view the adoption of more progressive tax policies as a means to promote economic justice while others may view it as punishment for hard work and ingenuity. When elected representatives design a tax structure, they have to take conflicting interests into account. How do the representatives weight these different interests? In the United States, politicians have to compete for office. Thus, the determination of tax policy should be examined in the context of electoral competition. Hettich and Winer (1999) developed a theoretical model in which the process of electoral competition forces political agents to take the preferences of the electorate into account when designing the tax structure. In their model, citizens vote for the platform that gives them the highest expected utility. Candidates running for office choose the fiscal platform that maximizes expected voter support. The weight that a particular citizen’s welfare receives can depend on the responsiveness of that citizen’s voting behavior to fiscal policy, whether he or she is a member of an organized interest group, and on the size of that group. The politically optimal tax structure may depend on voters’ financial interests and on their conceptions of economic justice. Analyses of survey data on support for redistribution by government conducted by Fong (2001) and Alesina and La Ferrara (2005) suggest that respondents’ preferences for redistribution are influenced not just by their economic and demographic characteristics but also by the extent to which they believe that the economic system is ‘‘fair.’’ Respondents who believed that society provides equal opportunities to all and that economic well-being is mainly determined by one’s own effort and ability tended to be less supportive of Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 181 redistribution, ceteris paribus. Emphasis on the role of personal effort and ability in the determination of one’s position in the income distribution tends to be associated with conservative views while belief in the dominance of luck and social connections tends to be associated with more liberal perspectives. Fong finds that the marginal effects of respondents’ beliefs concerning economic justice on support for redistribution are large in magnitude, even with respondents’ economic and demographic characteristics held constant. The marginal effects of those beliefs are twice as large as those of income. Voters’ conceptions of economic justice are likely to be grounded in established ideologies. Political scientists and economists previously have examined the relationship between state and local tax progressivity and measures of the average voter’s ideology. At least four measures of the average voter’s ideology have been used. Erikson, Wright, and McIver (1993) pool survey data across numerous years to obtain state-representative samples and measure average citizen liberalism in each state with the difference between the percentages of respondents who identified themselves as ‘‘liberal’’ and those who identified as ‘‘conservative.’’ They find that this measure is statistically significant and positively related to state and local tax progressivity. There are three significant limitations to the validity of the Erikson, Wright, and McIver measure of average voter liberalism. Because the authors obtained representative state samples by pooling many years of surveys, the measure does not change over time. A second limitation of the measure is that it does not capture differences in the intensity of a respondent’s liberalism, as the response was only ‘‘liberal,’’ ‘‘moderate,’’ or ‘‘conservative.’’ Another potential problem is that ideological self-identification may not map consistently into policy preferences. According to Stimson (1991, 61), ‘‘the symbols, personalities, ideas, and images underlying ‘liberal’ and ‘conservative’ include much content that is other than prescriptions for public policy.’’ Thus, the Erikson, Wright, and McIver measure may be a weak measure of operational ideology or a weak measure of the kinds of policies that citizens prefer. Chernick (1992) measures average voter liberalism with the average American Federation of Labor-Congress of Industrial Organizations (AFL-CIO) rating of state assemblies. An important limitation of the measure used by Chernick is that it only gauges the ideological orientation of the citizens who voted for the winning candidates. He finds that this measure is positively related to state and local tax progressivity. Morgan (1995) uses Holbrook-Provow and Poe’s (1987) measure of general voter conservatism. The measure is the average Conservative Coalition score for Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 182 Public Finance Review 41(2) the state’s congressional delegation. Morgan finds that the ideology measure is inversely related to state and local tax progressivity. Like the measure used by Chernick (1992), the Holbrook-Provow and Poe (1987) measure does not take the preferences of those who voted for the opposition into account. Fletcher and Murray (2008) measure average voter liberalism with the share of votes received by Al Gore in 2000. This measure does not capture differences in the intensity of liberal ideology among different electorates. The authors use the United Way’s State of Caring Index as a proxy for citizens’ tastes for redistribution. The constructive validity of this measure is limited because government redistributive policies and private charity may be substitutes. They find that both variables are statistically insignificant. The analysis that follows uses a measure of average voter liberalism that was developed by Berry et al. (1998). The measure is intended to gauge differences in the intensity of voter liberalism across states, capture changes over time, and summarize the ideological orientation of the entire electorate. Empirical Approach The analysis utilizes data on the combined state and local tax burdens for each income quintile in each state provided by Citizens for Tax Justice and the Institute on Taxation and Economic Policy (1996) and the Institute on Taxation and Economic Policy (2003, 2009). All three studies used the same methodology. The income quintiles are specific to each state. The authors utilized data on a stratified random sample that includes all household types and is statistically valid at the state level. The studies present the average tax rates (i.e., the percentages of income paid to taxes) for each state-specific income quintile for 1995, 2002, and 2007.4 The average tax rates consist of burdens imposed by personal and corporate income, general sales, property, cigarette, gasoline, and beer taxes. The studies allow portions of certain tax burdens to be exported to nonresidents. None of the studies takes tax importing into account. Corporate income, property, and retail sales taxes levied on firms could be passed forward to in-state or out-of-state consumers or passed backward to in-state workers and/or in-state or out-of-state capital owners depending on the tax instrument and on the characteristics of the industries affected by the tax. The methodology is described in detail in Appendix B. The empirical model can be summarized as follows: Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 183 Pit ¼ b0 þ b1 CLit þ b2 GLit þ b3 Xit þ b4 Eit þ b5 WPjt þ Fi þ Yt þ eit ; ð1Þ where i and t are subscripts for the state and year, respectively. The subscript j denotes neighboring states. Pit refers to one of three measures of state and local tax progressivity: the top quintile’s average tax rate as a percentage of that faced by the bottom quintile (Top-to-Bottom %), the average tax rate faced by the top quintile as a percentage of that faced by the middle quintile (Top-to-Middle %), and the average tax rate faced by the middle quintile as a percentage of that faced by the bottom quintile (Middle-to-Bottom %). CLit and GLit denote the average voter’s and the government’s liberalism, respectively. The vector Xit consists of relevant state demographics. The vector Eit contains measures of potential state tax exporting capacities. WPjt is the weighted average progressivity measure of neighboring states or the spatial lag of the dependent variable. Fi and Yt denote state- and year-fixed effects, respectively. The random error is denoted by eit. I use a measure of mean voter ideology that was developed by Berry et al. (1998; hereafter referred to as the BRFH measure). This measure has not been used in previous studies of state and local tax progressivity. The authors use the average of ratings of incumbent Congress members in each district by the Americans for Democratic Action (ADA) and the AFL-CIO’s Committee on Political Education (COPE) to quantify ideology. They assume that the ideological orientation of state legislators is the same as that of their congressional counterparts. Additionally, they assume that a challenger’s ideology score is equal to the average score of all incumbents in the state from the same party. The authors assume that the ideological orientations of the candidates are approximations of those of the voters who support them. Each electoral district’s ideology score is the weighted average party ideology where the weights are each party’s vote share. From the district scores, the authors calculate a state-level unweighted average. A higher score denotes greater liberalism. Since it is based on congressional votes, the BRFH measure is potentially a more valid measure of the average voter’s operational ideology than are alternative measures that have been previously used in this literature. The strength of the measure, however, is limited by the extent to which political parties deviate from the platforms desired by voters. If voters merely choose the ‘‘lesser evil,’’ then the BRFH measure is a limited measure of voter ideology. Another potential limitation of the measure is that it assigns equal weight to each voter. It is likely to be the case that political influence varies. Schlozman, Verba, and Brady (1999) find that the wealthy are significantly more likely than the less well off to donate dollars Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 184 Public Finance Review 41(2) and time to campaigns and participate in protests. Thus, the weight that a voter’s utility receives may be directly related to his or her income. Developing a state-level, income-weighted, average voter ideology measure presupposes the availability of a survey data set, with a state-representative sample, that reports respondents’ views of the economic system, policy preferences, and demographic characteristics. The surveys utilized by Fong (2001) and Alesina and La Ferrara (2005) contain the relevant information, but they are representative only at the national level. The sample used by Erikson, Wright, and McIver (1993) is representative at the state level. The limitations of their ideology measure are described in the third section. If the ideologies of the political parties are not identical, then majority rule will yield a government with an ideological orientation that may differ from that of the average voter. A particular party’s share of political power increases if it wins the governorship. For these reasons, the model includes the BRFH measure of government liberalism in addition to the measure of citizen liberalism. To calculate their measure of government liberalism, Berry and coauthors first assume that the minority party’s maximum share of power is 40 percent while the majority’s minimum share is 60 percent. If the majority’s share of power exceeds 60 percent, then it is assumed to have complete control. The governor and the legislature are assumed to have equal power. The authors assume that the ideological orientation of state officials (including the governor) is the same as that of the state’s Congressional delegation, as measured by the ADA and COPE. The authors estimate ‘‘government liberalism’’ by taking the weighted average of the ideological scores of both houses of the legislature, where the weights are each party’s effective power, and adding the governor’s ideology score. A higher value indicates a greater degree of liberalism. The BRFH government liberalism measure does not necessarily reflect the ideological orientation of the individual state legislators. Thus, the validity of the measure depends on the degree of ideological homogeneity within each party.5 Because government liberalism is a function of average voter liberalism, the models include only the component of government liberalism that is not explained by average voter liberalism. More specifically, I regressed government liberalism over average voter liberalism, took the residual, and include the residual in the models instead of the raw government liberalism measure.6 I expect both average voter liberalism and the government liberalism residual to be positively related to state and local tax progressivity. The models include measures of state demographic characteristics that may influence voter demand for tax progressivity. The politically optimal Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 185 level of redistribution may be lower in states that are ethnically heterogeneous. Research conducted by social psychologists, political scientists, and economists indicates that people tend to be more generous toward others who are more similar to them ethnically, racially, linguistically, and so on.7 These results may stem from ethnic or racial bias in the perceived worthiness of the recipients of assistance. The nonpoor may tend to attribute the misfortunes of poor people who are ethnically, racially, or linguistically different from them to moral weakness while attributing poverty among members of their own groups to bad luck. Fong and Luttmer (2011) find that nonblack potential donors tend to view recipients as being less worthy of aid when they believe that the recipients are predominantly black. Ethnic heterogeneity may also influence the demand for redistribution on the revenue side. One reason is that the nonpoor may be more concerned about reducing the average tax rates faced by the poor when the two groups tend to be of the same ethnicity. Additionally, the nonpoor may be willing to pay higher tax rates to support redistributive spending if the beneficiaries tend to be members of their ethnic groups. Hero (1998) examines the relationship between state ethnic heterogeneity and state and local tax progressivity and does not find a significant relationship. However, the author does not control for state tax exporting capacities or spatial dependence. The ethnic similarity between the poor and the nonpoor is the dimension of ethnic heterogeneity that is likely to be the most relevant for the political economy of tax progressivity. Thus, I attempt to measure the ethnic congruence between the poor and the nonpoor directly by calculating the probability that two randomly drawn individuals, one from the poor population and the other from the nonpoor population, are of the same ethnicity (Ethnic Congruence). If we denote the proportion of the nonpoor who are in ethnic group k as nonpoork and the proportion of the poor who are from group k as poork, then X nonpoork poork ; Ethnic congruence ¼ 8k where k ¼ Hispanics, non-Hispanic whites, non-Hispanic African Americans, other non-Hispanic. The ‘‘nonpoor’’ group consists of individuals with household incomes above the state median while the ‘‘poor’’ group consists of individuals with household incomes in the bottom fifth of the state’s income distribution. The ethnic congruence measure does not account for variation in the amiability of relations between ethnic groups. If greater diversity leads to greater contact between individuals of different ethnic groups, then it may Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 186 Public Finance Review 41(2) actually increase support for redistributive fiscal policies. Roch and Rushton (2008) examine the effects of racial diversity and residential segregation on white voter support for an Alabama state referendum that would have substantially increased the progressivity of the state’s tax structure. They find that white support for the measure at the county level is significantly and negatively affected by the degree of segregation but insignificantly affected by the African American share of county population. Their results suggest that it is the degree of tension between racial groups—and not racial diversity itself—that influences support for redistributive fiscal policies. I use the state-level analog of the county-level measure used in their study. Let xq be the proportion of state’s white population living in census tract q and let yq be the proportion of state’s nonwhites living in census tract q. Then Segregation ¼ 1 X : x y q q 8q 2 If each census tract has the same proportion of white and nonwhite residents as the state as a whole, then this segregation index equals zero. An index value of 100 indicates complete segregation. The measure can be interpreted as the proportion of the state’s nonwhite population who would need to move to a different tract in order to reduce segregation to zero.8 As was mentioned earlier, greater diversity may increase support for redistributive fiscal policy by increasing contact between different ethnic groups. However, individuals who are already comfortable with other ethnic groups may choose to live among them. Regardless of whether residential segregation reinforces or reflects animosity between ethnic groups, it can be viewed as a proxy for the degree of ethnic group tension. The African American share of state population is included in the models because Fong (2001) and Alesina and La Ferrara (2005) find that African Americans tend to be more supportive of redistribution. If the BRFH measure of average voter ideology is a precise measure of the average voter’s taste for redistribution, then the ethnic demographic variables should be redundant. They are included in case the BRFH voter ideology measure does not fully capture the electorate’s redistributive preferences. The models also include the percentage of a state’s population age sixty-five or older. This group is likely to have a high consumption-toincome ratio. Consequently, the elderly may prefer greater reliance on income taxes relative to consumption taxes. Thus, I expect the elderly population share to be associated with a progressive distribution of tax burdens. The model includes the percentage of workers who are labor union Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 187 members since labor unions tend to promote redistributive fiscal policies. I also control for income inequality, measured with the ratio between the mean and median household incomes, since a relatively high degree of inequality may create political pressure for redistribution (Hettich and Winer 1999; Chernick 2005). Numerous empirical studies of the political economy of subnational tax and spending policies control for per capita income and the poverty rate. Thus, those variables are controlled in the models estimated here. The equations include measures of a state’s capacity to export taxes to nonresidents via the federal deductibility of state and local taxes and interstate commerce. The percentage of tax returns with itemized deductions is used as a proxy for the deductibility offset for residents. Since highincome households are more likely to itemize, federal deductibility lowers the political costs associated with taxing these households. Feldstein and Metcalf (1987) make a strong case for the possibility that the itemization rate is subject to reverse causation.9 To address this issue, I use a generalized method of moments (GMM) model, which is described in detail in the next subsection. The models include proxies for a state’s capacity to export taxes through interstate commerce. The Sales Activity Index is a proxy for the importance of tourism in a state’s economy. It is the ratio between a state’s per-capita retail sales and the national average. Tourism provides opportunities for consumption tax exporting, which can influence state and local tax progressivity in two ways. Consumption tax exporting opportunities may encourage reliance on the sales and excise taxes, which reduce progressivity. However, the fact that nonresidents bear some of the burden allows governments to raise a given amount of revenue with lower consumption tax rates. Tourism may also encourage greater reliance on license fees, which may align the benefits obtained by tourists more closely with the costs associated with providing the public services that they utilize. For these reasons, the expected sign on the Sales Activity Index is ambiguous. The presence of mineral resource industries can also provide opportunities for states to shift taxes to nonresidents, either through the sale of these goods outside of the state or through backward shifting to investors.10 Firms involved in these industries tend to pay sales, corporate income, and property taxes. Portions of all of these taxes could potentially be exported, so it is unclear how the importance of mineral resources in a state’s economy could influence state and local tax structure. The politically optimal tax structure for a particular state may be influenced by the tax structures adopted by its neighbors. WPjt denotes the weighted average progressivity measure of state i’s neighbors or the spatial lag of the dependent variable. I experiment with two weighting matrices that Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 188 Public Finance Review 41(2) are frequently used in the literature: the simple contiguity matrix and the population-weighted contiguity matrix. The simple contiguity matrix assigns a weight of 1/n to each neighboring state, where n equals the number of neighbors, and a weight of zero to nonneighboring states. It calculates the unweighted average tax rate of neighboring states. With the populationweighted contiguity matrix, the tax variable of each neighbor is weighted by its share of the total population of neighboring states since a state may be more (less) responsive to the tax policies imposed by their larger (smaller) neighbors. As with the simple contiguity matrix, nonneighbors receive a weight of zero. The population weights are based on state population averaged across the sample period. As with all models of strategic interaction between governments, the sign on the spatial lag is theoretically ambiguous (Brueckner and Saavedra 2001). Since the tax structure adopted by state i may influence those adopted by neighboring states, WPjt will be treated as endogenous. The models control for year-fixed effects. State-fixed effects are likely to be relevant. However, the ratio between the average within SD of each tax variable and its mean tends to be very small (see table 1), meaning that state tax structures changed little during this period. Thus, most of the variation resulted from variation between states. To allow the between-state variation to play a greater role in the analysis, I use indicator variables for the nine Census divisions (with New England as the reference category) instead of state-fixed effects. The results must be interpreted with caution since the regressors may be correlated with the state-fixed effects and the Census division indicators may not completely control for states’ time-invariant, unobserved characteristics.11 Table 1 presents summary statistics. The data sources are presented in appendix A. Prior to estimating the above model, there are econometric issues that need to be addressed. There are two potentially endogenous variables: the itemization rate and the neighbors’ weighted average tax burden measure or the spatial lag. To address the potential endogeneity, I use a GMM estimator with clustering by state. I use three instruments for the itemization rate: its tenth-order lag, the percentage of household heads who are married, and the average number of children per household. The tenth-order lag of the itemization rate should be recent enough to be correlated with the current value but a deep enough lag to be uncorrelated with the error term. Edmiston and Spong (2012) find that married households and households with children are more likely to itemize. Thus, I expect the percentage of householders who are married and the average number of children per household to be positively related to the itemization rate. I do not expect these variables to be directly related to state and local tax progressivity. Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 189 Table 1. Summary Statistics Variable M Top-to-Bottom % Top-to-Middle % Middle-to-Bottom % Q1 Rate Q2 Rate Q3 Rate Q4 Rate Q5 Rate Average Voter Liberalism Government Liberalism Residual Ethnic Congruence Segregation Index African American Age 65þ Union Density Per Capita Income (thousands of year 2005 dollars) Sales Activity Index Mining Marriage Rate Number of Children Per Household Overall SD Within SD Min Max 76.7 85 89.2 10.796 9.807 9.458 9.071 8.059 50.12 0 20.2 13.9 13.8 2.128 1.603 1.532 1.603 1.869 15.8 23.673 5.987 5.719 6.920 0.945 0.623 0.515 0.451 0.611 7.669 17.222 31.2 130.1 47.5 112.7 53.9 125 4.7 17.6 4.7 14.3 4.8 14.3 4.3 14.6 3.013 13.833 8.45 95.972 45.566 49.911 0.593 53.503 10.527 12.799 11.933 31.883 0.171 10.724 9.559 1.614 5.463 5.947 0.044 2.801 0.378 0.322 1.417 3.875 0.312 29.052 0.35 8.593 3 20.936 0.967 75.118 37.028 18.524 27.9 52.728 1.014 2.531 53.203 0.704 0.131 5.269 3.608 0.092 0.066 1.189 2.275 0.051 0.78 0.018 50.8 0.56 1.51 34.65 69.1 1.24 Following Rork (2003), I use the spatial lags of the exogenous regressors as instruments for the spatial lag of the own-state’s tax measure. These are valid instruments provided that they are jointly correlated with the spatial lag of the own-state tax variable, uncorrelated with own-state unobservables, and not directly related to the own-state tax variable. I also included the tenth-order lag of the average income tax share of own-source revenue for neighboring states. The instruments satisfy two criteria: from Wald tests, I find that the instruments are jointly correlated with the endogenous regressors12; in overidentification tests, I fail to reject the joint exogeneity of the surfeit of instruments at the 95 percent confidence level. These tests provide evidence of the validity of the instruments. To determine whether the use of GMM was justified, I carried out the Durbin-Wu-Hausman endogeneity test. The null hypothesis of Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 190 Public Finance Review 41(2) Table 2. Pooled GMM Estimates for the Progressivity Equations.a (1) Top-toBottom % (2) Top-toMiddle % (3) Middle-toBottom % With simple contiguity weights Average Voter Liberalism Government Lib. Residual Ethnic Congruence Segregation Index African American Age 65 þ Union Density Per Capita Inc. ($1,000) Income Inequality Poverty Itemizers Sales Activity Index Mining Neighbors’ Progressivity Constant R2 0.259** 0.067 (.011) (.341) 0.038 0.013 (.271) (.606) 60.49*** 14.54** (<.0001) (.045) 0.575*** 0.360*** (<.0001) (.001) 0.069 0.181 (.718) (.146) 0.832 0.818 (.565) (.365) 0.029 0.301 (.929) (.149) 0.459 0.377 (.323) (.166) 5.409 0.946 (.731) (.908) 2.290*** 0.711*** (<.0001) (.005) 2.714*** 1.175*** (<.0001) (<.0001) 29.967*** 21.009*** (.007) (.002) 0.247 0.168 (.336) (.369) 0.740*** 0.777*** (<.0001) (<.0001) 37.05 142.2*** (.371) (<.0001) 0.60 0.59 0.247*** (<.0001) 0.003 (.913) 54.12*** (<.0001) 0.143 (.175) 0.270** (.039) 0.604 (.475) 0.355 (.138) 0.318 (.426) 7.188 (.576) 2.041*** (<.0001) 1.957*** (<.0001) 8.159 (.327) 0.447*** (.005) 0.675*** (<.0001) 33.11 (.284) 0.59 (4) Top-toBottom % (5) Top-toMiddle % (6) Middle-toBottom % With population-contiguity weights 0.205* 0.041 (.071) (.574) 0.014 0.007 (.742) (.804) 57.16*** 12.42* (<.0001) (.089) 0.577*** 0.436*** (<.0001) (<.0001) 0.127 0.259** (.544) (.040) 0.435 1.050 (.729) (.152) 0.140 0.388* (.694) (.052) 0.152 0.359 (.783) (.198) 1.428 5.939 (.910) (.463) 2.998*** 1.402*** (<.0001) (<.0001) 2.639*** 1.305*** (<.0001) (<.0001) 25.156** 16.143** (.020) (.026) 0.0901 0.199 (.756) (.342) 0.577*** 0.454*** (<.0001) (.001) 5.793 108.3*** (.875) (<.0001) 0.56 0.58 0.259*** (<.0001) 0.001 (.981) 57.08*** (<.0001) 0.199 (.113) 0.200 (.148) 0.175 (.842) 0.552** (.030) 0.163 (.722) 1.003 (.929) 2.242*** (<.0001) 1.969*** (<.0001) 14.660* (.093) 0.383** (.027) 0.519** (.003) 18.23 (.514) 0.58 Note: N ¼ 144. p ¼ values in parentheses. *p < .10. **p < .05. ***p < .01. a Year indicators and indicators for the nine Census divisions (with New England serving as the reference category) were included in the models. The coefficients from those indicators were omitted from the table to conserve space. exogeneity was rejected at the 95 percent confidence level for two of the three progressivity equations. Thus, the discussion of the results focuses on the GMM estimates. Results Table 2 presents the GMM regression results for the factors that influence the progressivity of state and local taxes. Regardless of which spatial Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 191 weighting matrix is used, average voter liberalism is positively and significantly related to the middle quintile’s average tax rate as a percentage of that of the bottom quintile (Middle-to-Bottom %). In other words, there is robust evidence of a positive relationship between average voter liberalism and progressivity toward the low end of the income distribution. It is also positively related to the average tax rate of the top quintile as a percentage of that of the bottom quintile (Top-to-Bottom %). However, the effect is statistically significant only at the 90 percent confidence level when the population-weighted contiguity weights are used. When average voter liberalism is statistically significant at traditionally accepted confidence levels, the effect of an increase in that variable of one SD falls between 4 and 5.5 percent of the mean value of the progressivity measure. Thus, it appears that the effects of average voter liberalism on state and local tax progressivity are economically insignificant.13,14 The estimated effects may have been larger if differences in political influence among voters could have been taken into account. The BRFH measure of average voter liberalism is a voter population-weighted average. Political influence may be positively correlated with wealth. If this tends to be the case, then an income-weighted average ideology measure may more accurately gauge the influence of voter ideology on state and local tax progressivity. Government liberalism does not appear to be a significant determinant of progressivity.15 State ethnic demographics appear to significantly influence the distribution of tax burdens across income groups. The ethnic congruence between the poor and the nonpoor is significantly and positively related to all three progressivity measures.16,17 Table 3 presents the effects of the ethnic demographic variables on each income quintile’s average tax rate. The estimates were obtained with the GMM estimator, using the same independent variables and excluded instruments that were used in the estimation of the progressivity equations. We see that Ethnic Congruence is inversely related to the average tax rate imposed on the bottom quintile and positively related to the average tax rate faced by the top two quintiles. It is also positively related to the middle quintile’s average tax rate. However, its statistical significance is sensitive to the spatial weighting matrix that is used. These results suggest that regressive taxation is more politically costly when there is greater ethnic congruence between the poor and the nonpoor. One possible explanation for the positive association between Ethnic Congruence and the average tax rates faced by the wealthy is that those taxpayers may get less disutility from paying taxes when members of their own ethnic group(s) constitute a large share of the beneficiaries. The effects of Ethnic Congruence on the progressivity measures are large in magnitude. A one-SD increase in Ethnic Congruence is predicted to increase Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 192 Public Finance Review 41(2) Table 3. Pooled GMM Estimates of the Effects of Voter Ideology and Ethnic Demographics on Average Tax Rates.a Q1 Rate Q2 Rate Q3 Rate Q4 Rate Q5 Rate Estimates from equations using the simple contiguity spatial weights Average Voter 0.005 0.009 0.013* 0.005 0.012* Liberalism (0.652) (0.193) (0.087) (0.491) (0.078) Ethnic Congruence 4.418*** 0.541 2.197* 3.301** 2.535** (0.004) (0.655) (0.078) (0.010) (0.023) Segregation Index 0.084*** 0.076*** 0.064*** 0.059*** 0.039** (<.0001) (<.0001) (<.0001) (<.0001) (0.001) African American 0.051* 0.011 0.014 0.013 0.036* (0.056) (0.657) (0.514) (0.509) (0.051) R2 0.42 0.44 0.56 0.69 0.76 Estimates from equations using the population-weighted contiguity spatial weights Average Voter 0.007 0.006 0.013 0.011 0.021*** Liberalism (0.512) (0.465) (0.108) (0.163) (0.008) Ethnic Congruence 4.101*** 1.439 3.115*** 4.126*** 2.983*** (0.009) (0.249) (0.004) (<.0001) (0.002) Segregation Index 0.082*** 0.071*** 0.058*** 0.048*** 0.024* (<.0001) (<.0001) (<.0001) (<.0001) (0.059) African American 0.053** 0.007 0.009 0.009 0.033* (0.043) (0.767) (0.667) (0.654) (0.078) R2 0.39 0.43 0.57 0.70 0.75 Note: N ¼ 144. p ¼ values in parentheses. *p < .10. **p < .05. ***p < .01. a The models include the regressors listed in table 2, along with the Census division and year indicators. The spatial lag of the relevant average tax rate was used instead of the spatial lag of a progressivity measure. The unabridged results are available upon request. the Top-to-Bottom % by about 13 percent from the mean regardless of which spatial weighting matrix is used. The effect of a one-SD increase in Ethnic Congruence on the Middle-to-Bottom % is equal to around 10 percent of the mean of that progressivity measure with both specifications of the spatial lag. The effect is a little more than twice that of average voter liberalism. These results suggest that the ethnic similarity between the poor and the nonpoor is an important determinant of the average tax rates imposed on the poor relative to those faced by middle and upper-income households. Ethnic Congruence is positively related to the Top-to-Middle %, but the effects are small in magnitude. Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 193 These results are at odds with those presented by Hero (1998), who does not find a significant relationship between ethnic heterogeneity and state and local tax progressivity. It is important to note that Hero does not control for tax exporting capacities and spatial dependence. I obtain results that are similar to his when I exclude the tax exporting variables and the spatial lag (these results are available upon request). I find that both the Sales Activity Index and the fitted values of the itemization rate from the first-stage regression are significantly correlated with Ethnic Congruence.18 The correlations between the spatial lags of the progressivity measures and Ethnic Congruence are insignificant. However, the fitted values of the spatial lags tend to be highly correlated with one or more of the other demographic variables, which tend to be significantly correlated with Ethnic Congruence.19 These relationships may explain the differences between the results presented here and those obtained by Hero. Excluding the tax exporting variables and ignoring spatial dependence may produce biased results. The degree of tension between ethnic groups, measured with an index of residential segregation also appears to be significantly associated with state and local tax progressivity. A one-SD increase in residential segregation is associated with a reduction in the Top-to-Bottom % of roughly 8 percent of the mean of that progressivity measure. It is also inversely related to the other two progressivity measures, but the effects are smaller in magnitude. The residential segregation index is positively related to the average tax rates faced by all five income quintiles. However, the effects are larger for lower-income groups. These results suggest that greater tension between ethnic groups is associated with higher state and local expenditures as a share of state personal income but that these expenditures are financed with relatively regressive tax structures. Social and economic divisions between ethnic groups may be directly related to spending on law enforcement and corrections. However, an examination of the effects of ethnic group tension on the composition of subnational government expenditures is beyond the scope of this study. Like Chernick (2005), I find that the progressivity of neighboring states is inversely related to own-state progressivity. The spatial lag is significantly and negatively related to all three of the progressivity equations. This means that if neighbors’ tax structures become less (more) progressive on average, then a particular state’s tax structure will become more (less) progressive. These results may reflect the development of tax havens within regions. A state’s capacity to export taxes through federal deductibility has a statistically and economically significant impact on state and local tax progressivity. The size of the deductibility offset for a state is increasing in the Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 194 Public Finance Review 41(2) percentage of tax returns with itemized deductions. An increase in the itemization rate of one SD is predicted to prompt an increase in the Top-to-Bottom % equal to approximately 26 percent of the mean. These results suggest that the indirect subsidy offered by deductibility has been a strong motivator for the adoption of progressive tax structures. These findings are consistent with those obtained by Chernick (1992, 2005). Tax exporting capacities arising from interstate commerce appear to exercise influences on the distribution of subnational tax burdens that are slight in economic terms but statistically significant. The Sales Activity Index is inversely related to the Top-to-Bottom % and the Top-to-Middle % while the mining share of state private sector GDP is positively related to the Middle-to-Bottom %. Discussion and Concluding Comments The survey-based research conducted by Fong (2001) and Alesina and La Ferrara (2003) suggests that citizens’ preferences for redistribution are significantly affected by conceptions of fairness even when variables reflecting the extent to which they are likely to benefit financially from redistributive policies are held constant. Conceptions of fairness are likely to be grounded in established ideologies. This study examines the relationship between average voter liberalism and the determination of tax progressivity by state and local governments. I find that the impact of average voter liberalism is statistically significant and positive. However, the relationship does not appear to be economically significant. These results may reflect measurement error. Thus, continued experimentation with the measurement of voter ideology may yield valuable results. On the other hand, the ethnic congruence between the poor and nonpoor and the degree of tension between ethnic groups appear to have substantial impacts on state and local tax progressivity. When the poor and nonpoor tend to be of the same ethnicity, state and local governments tend to utilize tax structures that are more progressive, ceteris paribus. The amiability of ethnic group relations, measured with an index of ethnic residential segregation, is inversely related to progressivity. Thus, the downward pressure on support for progressive taxation generated by ethnic dissimilarity between the poor and nonpoor may be offset by greater congeniality between ethnic groups. These results indicate that voter preferences concerning tax progressivity are not completely determined by narrow self-interest. Voters appear to consider the impacts of state and local fiscal policies on others. However, the weight that the nonpoor attach to the well-being of the poor appears to be substantially shaped by ethnic group loyalty and by the degree of tension between ethnic groups. The fact that these variables are significant even with average voter liberalism held constant Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 195 suggests that the interaction between state ethnic demographics and voter altruism may not be captured by measures of general voter ideology. The results presented here suggest that changes in ethnic demographics could lead to changes in state and local tax progressivity. Population projections developed by the US Bureau of the Census suggest that significant changes in the nation’s ethnic composition will occur in the proceeding decades. From 2010 to 2050, the Hispanic share of the population is projected to rise from 15 percent to 24 percent. The effects that these changes will have on the ethnic similarity between the poor and the nonpoor will depend on the upward mobility of Hispanics in the proceeding decades. If the growth of the Hispanic population increases the Hispanic share of the poor population without leading to an increase in the Hispanic share of the nonpoor population that is at least equal in magnitude, then it may place downward pressure on popular support for progressive taxation. The effects may be less pronounced if ethnic differences become less divisive. Appendix A Data Sources Variable Source Average Tax Rates Citizens for Tax Justice/Institute on Taxation and Economic Policy (2003); Institute on Taxation and Economic Policy (2009) Average Voter Liberalism, Richard Fording’s website: http://www.bama.ua.edu/ Government Liberalism *rcfording Segregation Index William H. Frey and the University of Michigan Social Science Data Analysis Network Itemization Rate US Internal Revenue Service, Statistics of Income, various years Sales Activity Index US Department of Commerce, Bureau of the Census, Statistical Abstract of the United States, various years Mining, Per-Capita Income US Bureau of Economic Analysis, various years Calculated by author using data from US Department of Income Inequality, Commerce, Bureau of the Census; United States Number of Children Department of Labor, Bureau of Labor Statistics, Per Household, Ethnic Annual Social and Economic Supplement Survey, various Congruence, Marriage years Rate Age 65þ, African US Department of Commerce, Bureau of the Census, American http://www.census.gov/popest/archives/ Union Density Hirsch, Macpherson, and Vroman (2001) Poverty Rate University of Kentucky Center for Poverty Research Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 196 Public Finance Review 41(2) Appendix B Methodology Used to Develop the Average Tax Rates The tax burden estimates used here were provided by the Citizens for Tax Justice and the Institute on Taxation and Economic Policy (1996) and the Institute on Taxation and Economic Policy (2003, 2009). The authors used samples of IRS tax returns, data from the US Census Bureau, and other sources to estimate the personal income, general sales, cigarette, gasoline, beer, corporate income, and property tax burdens for samples of households that are representative at the state level. The authors use state and local tax provisions to estimate the income tax burdens for each household. Estimates of the homeowner property tax burden borne by itemizing homeowners were derived from IRS tax return data. The burdens for nonitemizers were imputed using data from the Census and other sources. The authors estimated the sales tax burdens for their samples by imputing expenditures for numerous items and calculating the tax burdens based on those expenditures. More specifically, the authors utilized data from the Consumer Expenditure Survey (CES) to estimate a model of household expenditure on each item. The authors then used the estimated models to impute the consumption expenditures for the households in their state-level samples. The sales and excise tax burdens were estimated by applying state and local sales and excise tax provisions. Business property and corporate income tax burdens were estimated by first allocating the national total business property and corporate income burden to the states in relation to each state’s share of national capital income. The authors proceeded to allocate a particular state’s business property and corporate income tax burden across that state’s income groups according to each group’s share of state capital income. In states that imposed business property and corporate income taxes that were significantly above the national median, the authors assigned the excess to either in-state wages or in and-out-of-state consumption depending on the activity. The authors also accounted for sales and excise taxes levied on firms. These levies were divided into those paid by industries producing for domestic markets and those producing for national Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 197 markets. Taxes on domestic market items were assigned to residents of each state in proportion to their share of the state’s consumption expenditures on each item. Taxes on national market items were assigned to national consumption with an adjustment to reflect a portion assumed to be retained in state. In states that imposed relatively high sales and excise taxes on national market activities, firms may not be able to pass the entire burden forward to consumers because of competitive factors. Because capital and labor are immobile in the short run, portions of these taxes may be shifted back to wages and capital. For states with national market business tax burden that were significantly above the national median, the authors divided the excess evenly between in-state wages and capital. Declaration of Conflicting Interests The author declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. Funding The author received no financial support for the research, authorship, and/or publication of this article. Notes 1. See Tresch (2002, 832–928) for a review of the theoretical literature on fiscal federalism. 2. The progressivity of the tax system can be enhanced by imposing relatively high tax rates on commodities consumed disproportionately by the rich. 3. The development of cross-sectional data on lifetime tax incidence is likely to involve significant data analysis challenges. 4. Tax burden estimates for earlier time periods are available. The Citizens for Tax Justice (CTJ) produced estimates for 1985 and 1991 in CTJ (1991). The study used a different sampling strategy and different shifting assumptions than those used by Citizens for Tax Justice and Institute on Taxation and Economic Policy (1996) and the Institute on Taxation and Economic Policy (ITEP; 2003, 2009). Estimates for 1977 were provided by Phares (1980). While the CTJ/ITEP studies were based on microsimulation approaches, Phares used aggregate state data to allocate total tax burdens to income groups. Chernick (2005) pooled the Phares estimates with the CTJ estimates to form a three-year panel. Data on all of the regressors in the models presented here are available only for 1990 onward. Thus, I was only able to add the 1991 CTJ cross section to the panel. Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 198 5. 6. 7. 8. 9. 10. 11. 12. Public Finance Review 41(2) To determine whether the 1991 cross section could be pooled with the 1995, 2002, and 2007 cross sections, I carried out the Chow test for parameter constancy. The null hypothesis of parameter constancy was rejected at the 99 percent confidence level for all of the equations. Erikson, Wright, and McIver (1993) developed a measure of mean state ‘‘elite ideology’’ based on survey responses from political party elites within each state. However, this measure dates back to the mid-1980s. Using the raw government liberalism measure does not substantially affect the results. Using the residual instead simplifies the interpretation of the results since one is not required to take into account the indirect effect of average voter liberalism on progressivity through its effect on government liberalism. See Fong and Luttmer (2011) for a review of the literature. I obtained the segregation data from William H. Frey and the University of Michigan Social Science Data Analysis Network. The authors calculated the segregation index from 1990 and 2000 decennial Census data and from American Community Survey data pooled from 2005 to 2009. I used the estimates derived from ACS data for 2007 and produced estimates for 1995 and 2002 with linear interpolation. The authors calculated the indices for white– African American, white–Hispanic, and white–Asian segregation. I use a weighted average of these indices for which the weights are each nonwhite group’s share of the sum of the state’s Hispanic, non-Hispanic African American, and non-Hispanic Asian populations. If income tax rates are relatively high in a particular state, then more taxpayers are likely to itemize. This would cause an upward bias. If a state dominates a natural resource market, then it may be able to shift a portion of its business taxes forward to nonresident consumers. Otherwise, any exporting of these taxes that occurs will be backward to nonresident investors (Gade and Adkins 1990). I estimated the models with the GMM fixed effects estimator and found that the fitted values and the estimates of the fixed effects are significantly correlated in every case. This suggests correlation between the state fixed effects and at least one of the regressors. The Census division indicators may only account for a portion of the variation that is explained by the state-fixed effects. Consequently, the estimates presented here must be interpreted with caution. Evidence of identification of the endogenous variables does not rule out the possibility that the instruments are only weakly correlated with the endogenous regressors. Weak identification can potentially produce a serious degree of small-sample bias. I obtained the Kleibergen and Paap weak identification test statistics and compared them to the critical values provided by Stock and Yogo (2005). These critical values are defined so as to ensure that the bias of GMM is Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 Foster 13. 14. 15. 16. 17. 199 no more than 10 percent of the bias of OLS at the 95 percent confidence level. In all but two of the equations, the Kleibergen-Paap statistic exceeded the Stock-Yogo critical value. The test statistic failed to reject the null hypothesis of weak identification for the equations for the Top-to-Bottom and Top-toMiddle percentages, with the spatial lag calculated with the populationweighted contiguity weights. For both equations, the Kleibergen-Paap test statistic exceeds the Stock-Yogo test statistic that ensures that the bias of GMM is no more than 20 percent of the OLS bias. The Kleibergen-Paap test statistic is robust to within-cluster correlation in the errors. However, the Stock-Yogo critical values require an assumption of i.i.d. errors. Critical values for the Kleibergen-Paap statistic have not been developed. This is problematic in this case since within-state error correlation could be present. When one is dealing with potential within-cluster error correlation in a GMM context, Baum, Schaffer, and Stillman (2007) recommend reporting the Kleibergen-Paap statistic and using the Stock-Yogo critical values with caution. I also estimated the equations with the Erikson, Wright, and McIver (1993) measure of average liberalism. The coefficient on this measure is significant only in the equation for the Middle-to-Bottom %. The magnitude of the effect is not substantially different from that of the BRFH voter liberalism measure. These results are available from the author upon request. Replacing Census division-fixed effects with state-fixed effects has a significant impact on the results. When state-fixed effects are included and the population contiguity weights are used, average voter liberalism has a small negative effect on the Top-to-Middle %. It is otherwise statistically insignificant. These results may be attributable to the low degree of within-variation in average voter liberalism. The within-SD of average voter liberalism is equal to 11 percent of the mean. Both the government liberalism residual and the raw government liberalism measure are insignificant even when average voter liberalism is excluded. Excluding government liberalism or the residual measure does not substantially affect the coefficient on average voter liberalism. Excluding Ethnic Congruence and residential segregation from the model does not significantly affect the coefficient on average voter liberalism and vice versa. When state-fixed effects are used, the coefficient on Ethnic Congruence is positively related to the Top-to-Bottom %. The coefficient is about half the size of the coefficient that is obtained when the Census division fixed effects are used. It is only statistically significant when the population-weighted contiguity weights are used. It is insignificant in the equations for the other two progressivity measures. These results may be attributable to the low within-state variation in Ethnic Congruence. The within-SD is equal to about 7 percent of the mean. Downloaded from pfr.sagepub.com at PENNSYLVANIA STATE UNIV on February 19, 2016 200 Public Finance Review 41(2) 18. Ethnic Congruence is positively correlated with the Sales Activity Index but negatively correlated with the itemization rate. The absolute values of the correlation coefficients are close to 0.2. 19. For example, the correlation between the spatial lag of the Top-to-Bottom % and the poverty rate is .42. The correlation between the poverty rate and Ethnic Congruence is .35. 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