Working Paper Issue Date: December 29, 2015 Corporate Environmental Responsibility and Firm Performance Beyond the Boundary of the Firm Jongjin Sohn Korea Advanced Institute of Science and Technology Abstract This study explores whether corporate environmental responsibility plays an important role in improving financial performance. I examines the impact of CER on a firm’s short-term and long-term financial performance. By employing a unique dataset about the carbon footprint covering 19 industry sectors in North America for 2003–2010, I found the evidence that firms benefit not only from CER in internal operation but also from CER in their supply chain. Further, I found that regulatory stringency weakens the positive CER effects on short-term financial performance, but it strengthens the positive CER effects on long-term financial performance. This finding is consistent with the prediction of a natural resource-based view and stakeholder theory. By investigating the carbon footprint issue, this study discusses the importance of CER not only for our society to be green, but also for a focal firm to be financially sustainable. * Supervisor: Professor Bae Zong Tae Copyright by Graduate School of Green Growth, College of Business, KAIST. All Rights Reserved. All Pages cannot be copied without permission 1 / 29 Contents 1. INTRODUCTION………………………………………………………………………..3 2. THEORY AND HYPOTHESES…………………………………………………………5 2.1 Background …………………………………………………………………………...5 2.2 A natural resource-based view and short-term financial performance………………....9 2.3 Stakeholder theory and long-term financial performance……………………………12 3. RESEARCH METHODS …………………………………………………………….. 14 3.1 Data and Measurement……………………………………………………………….14 3.1.1 Dependent variables ……………………………………………………………..14 3.1.2 Independent variables ………………………………………………….………..15 3.1.3 Moderating variable…………………………………………………….………..15 3.1.4 Control variables…………………………………………………….……….…..16 3.2 Data Analysis………………………………………………………………….……..17 4. RESULTS…………………………………………………………………………....…..18 5. Discussion………………………………………………………………………….…….20 6. Reference ………………………………………………………………………….…… 22 7. Tables and Figures ……………………………………………………………………24 8. Appendix ………………………………………………………………………….…… 29 2 / 29 1. INTRODUCTION Climate change is one of the greatest challenges facing humanity and is already manifest in the 21st century. Recently, climate change has received considerable attention from strategy scholars. Many of these scholars have detailed efforts to take steps to mitigate climate change and addressed the importance of new approaches to governance systems and to environmental imperatives. As climate impacts become more apparent, corporate environmental responsibility (CER) is also becoming a major issue and playing an important role in the corporate landscape. For example, as climate change can reshape value chain, including supply network, production arrangement, and the provision of energy and water [1], it requires companies to become far more efficient in use of energy such as transportation of raw materials, components, and products. The increasing attention of CER has already led some companies to rethink their supply chain. For example, Walmart ambitiously launched sustainability program in October 2005 with three plans: (1) be supplied 100 percent by renewable energy, (2) create zero waste, and (3) sell products that sustain people and environment [46]. In addition, the UK retailer Sainsbury’s has also made “20×20 Sustainability Plan” which covers reducing environmental impact of supply chain’s carbon footprint. As companies put more efforts on improving their energy efficiency and reducing carbon footprint, large-scale changes are likely to arise in supply chain as well as the companies’ internal operations [1]. The increasing important of CER has also received huge attention from academic research. Previous studies have discussed from the reasons why companies go green [2] to why companies engage in CER and how CER relates to corporate financial performance (CFP) [3, 4]. However, while researchers have long explored the relationship between CER and CFP, the evidence shows mixed results and is inconclusive [5, 6]. More importantly, little is known about 3 / 29 the relationship between CER and firm performance when taking into account the environmental responsibility in the supply chain. In this study, I attempt to extend two existing theories to develop hypotheses on how CER influence firms’ short-term and long-term financial performance. To address the importance of expanding the CER practice beyond a traditional firm boundary, I consider CER in two distinct scopes: a focal firm’s internal operation and its supply chain. While previous research has addressed CER with narrow scope of CER practice (e.g., firms’ internal toxic chemical uses or carbon emissions), this study encompass the CER practice performance by a focal firm’s suppliers. Furthermore, I investigate effects of regulatory stringency, which influences the relationship between CER practices and a firm’s financial performance. In sum, this study investigates a conventional domain of CER research by investigating CER effects on firms’ financial performance, but highlights a wider range of factors, which are critical to sustainability research. The conceptual framework in this study primarily depends on two existing theories: the natural resource-based view of the firm [6, 7] and stakeholder theory [8]. First, from the natural resource-based view, I assumed that CER generates competitive resources for firms, which in turn enhance profitability as exemplified by Porter [9]. With efforts to increase environmental responsibility, the companies have greater chance to discover inefficient process in the companies’ internal operation as well as in their supply chain. In support of these arguments, I find that firms with high CER–measured by firm-level carbon footprint from Trucost database–in the internal operation and supply chain gain short-term financial return. Second, from the stakeholder theory, I assumed that as the norm institutionalizes environmental responsibility, the companies with higher CER in their internal operation as well as supply chain accrue more profit than those with lower CER. Similarly, I argue that the 4 / 29 companies with lower carbon footprint benefit from the market, while companies with higher carbon footprint experience higher penalty from the market. In keeping with the above arguments, I find that the lower carbon footprint is positively associated with a firm’s market value. Overall, the findings support the idea that environmental responsibility, not only from the companies’ own operation but also from their supply chain, enhance their economic value. This study also explores how the impact of environmental responsibility in the supply chain on financial performance depends on the regulatory stringency. In the following sections, I review related literatures, advance my theoretical arguments in detail. Then I present the data and methodology, analyze the empirical results, and conclude with discussion and implications of my findings. 2. THEORY AND HYPOTHESES Background In the business strategy literature, the “pay to be green” debate has discussed whether firms profit from improving their environmental impact on our natural environment and society as a whole [5, 10, 11]. Conventional thought adopted a perspective seeing the issues as inevitable trade-offs between social benefit and private costs to companies [43]. For example, a government pushes for stringent standards while companies try to beat the standards back. The classic Friedman’s [43] view holds that environmental responsibility will offset economic benefits because of entailing substantial costs. Against the conventional thought, Porter and Van der Linde [12] criticized that the conventional notion only reflects the static view, in which production process, technology, and customer demands are all fixed. They addressed 5 / 29 competitive advantage rests on the capacity for innovation and improvement which shift the constraints, rather than on static efficiency or on optimizing within fixed constraints. In this regard, environmental issues may impose constraints but also offer opportunities, thereby shifting the competitive landscape in many industries [13]. Scholars have conceptualized the “pay to be green” debate and provided “win-win” hypothesis that firms can profit from providing the social benefit by improving environmental performance [3, 4, 14]. For example, strategic decision based on the firm’s relationship to the ecological environment, such as carbon footprint, can create competitive advantage by reducing the environmental concerns [7]. King and Lenox [15] found that only by preventing pollution, firms can recognize inefficient process, reduce unnecessary costs and increase profit from pollution reduction. The line of literature above is consistent with a natural resourcebased view, which addressing that embracing the environmental challenge into a firm’s resource develops competitive advantage [7]. However, this recent works have been limited in three important ways. First, although a natural resource-based view [7] suggest three sources of strategic capabilities – pollution prevention, product stewardship, and sustainable development – as competitive advantages, previous research have focused narrowly on pollution prevention issues, which emphasize on environmental management in a firm’s internal operation such as total quality environmental management. While pollution prevention focuses on building new capabilities in internal production and operation, product stewardship illustrates stakeholders’ perspective toward environmental impact, integrating activities at every set of supply chain from raw material access to disposition of used products [7]. Last two decades have shown a clear trend towards focusing on a few activities in internal operation, and outsourcing the rest of activities such as procuring raw materials and 6 / 29 components, transporting materials, and designing products as relying on supply chain. Stakeholders have increasingly focused their attention not only on firms’ internal operations but also on supply chain. As firms have become more accountable for their suppliers’ environmental performance, firms face greater risk of managing their reputation when handling environmental problems poorly [16]. However, measuring environmental performance of supply chain is not easy in that capturing environmental performance within a firm’s supply chain requires an assessment extending beyond the boundary of the firm. Recently, growing environmental concerns about carbon footprints, air pollutants, general waste, and land and water pollutants, have attracted media attention and those have been measured far beyond the boundary of a focal firm (i.e., its supply chain). In particular, the carbon footprint captures the greenhouse gas (GHG) emissions generated by first-tier and further suppliers. As stakeholders have shown growing attention to the environmental issues such as climate change, stakeholders’ demand for reporting CER also has been increased. For example, Apple’s environmental responsibility reports inform that iPhone 6 has a carbon footprint of 95kg of carbon dioxide-equivalent, of which 89 percent comes from the supply chain, including production (85%), transport (3%) and recycling (1%) [40]. As this example illustrates, CER in supply chain can have fruitful implications for practitioners with more severe magnitude. Although researchers and managers have developed the notion that companies and their supply chain partners should appraise both CER and CFP [17], only few studies investigated relationship between the environmental performance and firm performance in supply chain [e.g., 18] and large part of green supply chain literatures exist far from main stream of “pay to be green” debate. Recently, OECD guidelines recommends companies to take fully into account of established policies in which they operate and consider the view of stakeholders. More 7 / 29 importantly, the guidelines urge to consider an impact not only from enterprises’ own internal operations, but also from their supply chain partners. According to its guidelines, “enterprises should seek to prevent or mitigate an adverse impact where they have not contributed to that impact, when the impact is nevertheless directly linked to their operations, products or services by a business relationship” [42]. Responding to this environmental concerns extending toward beyond the boundary of firm, the growing number of companies participate in Carbon Disclosure Project (CDP) voluntarily [19]. The participating companies disclose information about carbon footprint both from companies’ internal operation and their supply chain. Thus it is a timely issue to explore whether the “win-win” hypothesis is applicable only for a focal firm or it is also applicable when extending it beyond the boundary of the firm; its supply chain. Second, the literature studying the relationship between CEP and CFP more rely on the process-based measurement than outcome-based measurement. While process-based measurement considers the companies’ internal efforts to deal with environmental issues, outcome-based measurement focuses on direct measure of environmental performance such as pollution reduction and carbon emissions [20]. Although the process-based measurement may reflect commitments for improvement in environmental performance, still there is no guarantee that firms’ commitments will reduce their ‘true environmental cost’ and subsequently influence their performance [21, 22]. Scholars have examined CER on outcome-based measure and studied the relationship between CER and CFP [e.g., 3, 15]. For example, Hart and Ahuja [3] investigated the relationship between pollution reductions and firm performance. They found pollution reductions (i.e. outcome-based measurement) profit firms by increasing efficiency, giving cost advantage, and saving money. The line of research based on outcome-based measure however, has limited in that it only examined a focal firm’s CER. Since outsourcing can be an effective 8 / 29 means by which firms can shift environmental responsibility to supply chain, they reduce emissions by outsourcing environmental concerns to supply chain partners [23]. Consequently, it has been difficult to draw a conclusion whether firms profit by taking environmental responsibility themselves or by just shifting their responsibility to partners. Therefore, it is still unclear whether an effort to reduce the environmental cost indeed satisfies the “win-win” hypothesis when encompassing the firms’ supply chain. Third, since previous studies have focused on heavily polluting industries such as chemical, mining, and utility industry, the studies could not generalize implications to the other industries. However, environmental impacts from GHG emissions is notably influenced by other sector such as information and communication technology (ICT) sector because the GHG emission from purchased electricity is significantly large and still growing. For example, data centers in ICT sector take almost 2 ~ 2.5% of global GHG emissions [24]. Thus it is necessary to consider wider range of industries, including seemingly to nonpolluting sectors, because the true cost of environmental damage from them is unexpectedly large. In sum, management scholars have long examined the relationship between CER and CFP however, they found inconclusive results. In particular, it is indeed still in a nascent stage to discuss the “pay to be green” issue with encompassing a wider range of the boundary of the firm. To fill the research gap mentioned above, this paper considers two empirical questions. First, this research focuses more on carbon footprint from supply chain and how it influences CFP. Second, by taking account regulatory stringency in the empirical model, this study investigates whether firms within stringent regulation face greater tradeoff between social benefit and private cost. To answer these questions, I use on unique dataset which measures firm-level information of GHG emissions from a focal firm’s internal operation and from its supply chain. 9 / 29 2.1. A natural resource-based view and short-term financial performance In the natural environment context, firms can acquire cost advantages by reducing environmental damages [12]. For example, significant cost saving can be achieved through more efficient use of energy and materials, reduction of waste, and addressing life cycle assessment (LCA). In particular, LCA is one popular approach to quantify the whole environmental impacts of a product’s use of material and energy throughout its extended supply chain [23]. Thus, firms with LCA have more potential to increase resource productivity because they are more likely to find another source (i.e., supply chain) of cost-saving. Hart [7] suggested a natural resource-based view of a firm and addressed the importance of environmental management principles expanded to supply chain. It is known as product stewardship, including activities such as remanufacturing, reverse logistics, and product recovery. By implementing such activities, firms are more likely to recognize inefficiencies not only in their own process, but also in the supply chain network. For example, Samsung Electronics joined the ‘Energy mentorship program for Small and Medium Enterprises’ on April 2012 to collaborate with small and medium size suppliers to improve the energy efficiency by transferring expertise [41]. Samsung Electronics’ commitment to sustainable development with supply chain increase frequency of sharing resource, which helps the company know more about their supply chain network. As the example illustrates, incorporating ecological concerns into business strategy may enhance firms’ recognition of inefficiency in the supply chain as well as a focal firm’s internal operations. Accordingly, the natural resource-based view regards organizational capabilities to dealing with environmental problems as a source of competitive advantage [7]. In addition, CER can profit firms through preempting competitors by setting new standards or accessing preferred locations, production capacity, and customers [7]. More importantly, such capabilities 10 / 29 are either tacit or socially complex [25], therefore it is difficult for competitors to replicate. In this regard, keeping low levels of carbon footprint represents that the firm’s operations are relatively efficient, and in turn it may increase return on asset (ROA) which is assumed to reflect the efficiency of assets in generating income [20, 26]. Therefore, I argue that not only CER in firms’ internal operation, but also CER in their supply chain enhances short-term financial performance (i.e., ROA). Hence, I have the following hypotheses. H1a: Corporate environmental responsibility in their internal operations is positively associated with short-term financial performance (ROA). H1b: Corporate environmental responsibility in their supply chain is positively associated with short-term financial performance (ROA). However, the CER positive effects on firms’ short-term performance may diminish if the firms belongs to an industry sector that has regulatory stringency. For example, for the firms within relatively more stringent regulation, incorporating ecological concerns into business activity may hinder firms’ core activities (e.g., cost, quality, and faster time-to-market) to maximize efficiencies and acquire competitive advantage in a short period of time [27]. In particular, since GHG emissions are tightly coupled with energy consumption, addressing environmental issues may contradict to the firms’ production which in turn reduce firms’ short term performance. In addition, the raising the environmental issues to the firms’ suppliers are likely to compromise a central part of firms’ advantage over competitors at the supply chain. Even though firms’ commitment to reduce GHG emissions in supply chain might increase future value of a focal firm as well as its supply chain network by sharing resource and increasing synergy effects, there is little evidence to believe that this investment results in enhanced shortterm profits (Hart, 1995). 11 / 29 In sum, although firms’ efforts to minimize GHG emissions enhance their ability to recognize inefficient process in their own business as well as their supply chain, the endeavor has no guarantee to gain financial benefit in short period of time if regulation is stringent [7, 10]. Therefore, if firms get too much pressure from regulation, ensuing cost to reduce GHG emissions is difficult to offset by the few benefit in short period of time [28]. Thus, I hypothesize as following. H2: Regulatory stringency weakens the relationship between corporate environmental responsibility in supply chain and short-term financial performance. 2.2. Stakeholder theory and long-term financial performance Recently firms face a great deal of scrutiny not only from a government but also from many other stakeholders including non-profit organizations and non-governmental organizations. As a result, the scrutiny increasingly demands firms to introduce more environmental friendly practices [29]. In particular, one important criteria of firms’ environmental friendly practices is to deal with environmental issues not only for their internal operation, but also for their supply chain partners. Therefore, supply chain management has been in increasing demands to consider a complex array of elements that include the product and the process of the supply chain. Freeman’s [44] stakeholder theory suggested that firms can benefit when considering the interests of a broad group of stakeholders. Instrumental stakeholder theory, as an important extension of stakeholder theory, has proposed that CER efforts can be seen as instrumental in acquiring necessary resource or stakeholder support [8]. For example, Walmart’s introduction of a sustainability program improved the company’s reputation and appealed to stakeholders who are concerned about the environment. According to New York Times [47], “while the initiative may be good for the environment, it may also be good for Wal-Mart. Driving costs out of 12 / 29 the supply chain could result in savings for Wal-Mart that can be passed along to consumers— enabling the company to uphold its reputation as a destination for rock-bottom prices.” As the example illustrates, companies can generate profit through attaining reputation from stakeholders when managing environmental responsibility effectively. Following the previous literature [e.g., 14, 30], I consider Tobin’s q as effective indicator of intangible value and assume Tobin’s q reflects the firms’ long-term financial performance. Hence, I propose following hypotheses. H3a: Corporate environmental responsibility in their internal operations is positively associated with long-term financial performance (Tobin’s q). H3b: Corporate environmental responsibility in their supply chain is positively associated with long-term financial performance (Tobin’s q). I do not expect firms to have cost uniformly to increase CER. The costs of maintaining the higher CER may vary, in part, due to difference across the regulatory stringency that each firm faces. In addition, the cost of complying with government regulations vary widely across industries. As discussed earlier, the trade-offs between social benefits and private costs is likely to become more visible under stringent regulation [31]. Therefore, firms within stringent regulation are exposed greatly to the public policy process [32], and potential risk is also higher due to the high visibility to media coverage and surrounding communities. However, although regulatory stringency may harm the positive effects of CER on firms’ short-term financial performance, it may benefit firms by increasing the positive CER effects on long-term financial performance. Only when core concerns (e.g., cost, quality, and faster time-to market) are resolved, commitment to environmental issues with suppliers could bring benefit [29]. 13 / 29 As stakeholder theory suggests, companies can profit through acquiring reputation from stakeholders when dealing with environmental responsibility effectively. Stakeholder coalitions have increasingly formed for better transparent practices with respect to GHG emissions [33]. This concern for transparency is conspicuous especially in the capital market, where there is an increasing attention to the climate change and environmental responsibility [27]. As firms’ supply chain management have a significant impact on value creation, a growing demand for transparency in supply chain is not uncommon [34, 35]. Furthermore, the increasing stakeholders’ demands for CER are not only limited to the level of carbon footprint from firms’ own operation, but also that from their supply chain. Accordingly, I expect that positive CER effects on long-term financial performance are more visible for firms under regulatory stringency. Hence, I suggest the following hypothesis. H4: Regulatory stringency strengthens the relationship between corporate environmental responsibility in supply chain and long-term financial performance. 3. RESEARCH METHODS 3.1. Data I used three data set – Trucost, Compustat, and KLD Research Analytics (KLD) – and merged based on the list of North American companies in the Trucost database from 2003 to 2010 because almost all information of firms in Trucost was available in Compustat. Figure 1 shows the number of observation by industry Classification Benchmark (ICB) supersectors based on data from Trucost. 3.1.1. Dependent variables Return on assets & Tobin’s q 14 / 29 I use the Compustat database to create two financial performance variables: return on assets (ROA) and Tobin’s q. Following the previous literature [4], I calculate ROA by dividing earnings before interest by total sales. Tobin’s q, defined as the ratio of a firm’s market value to the replacement cost of its assets, following the method developed by Chung and Pruitt [36]. Tobin’s q is adequate measure for intangible value [14, 30], especially when predicting effects of CER as it reflects firms’ reputation, and investor’s trust towards them [20]. 3.1.2. Independent variables Carbon footprint I use carbon footprint as a proxy for corporate environmental responsibility. Carbon footprint in the regression model require special attention in interpretation, as high carbon footprint would imply low CER. In other words, a low level of carbon footprint corresponds to high CER. I create two main independent variables using Trucost database to define a firm’s carbon footprint: internal carbon footprint and supply chain carbon footprint. GHG emissions is measured in carbon dioxide equivalents (CO2e) based on the Greenhouse Gas Protocal, which is the most widely accepted standard as an accounting tool [37]. Internal carbon footprint is measured by normalizing GHG emissions from internal operation by sales. Supply chain carbon footprint is calculated by normalizing GHG emissions from first-tier supplier by sales. I capture only first-tier indirect GHG emissions as supply chain GHG emissions mainly because these are the emissions over which the company has control. Figure 2 shows the average GHG emissions by each sector, indicating that internal carbon footprint and supply chain carbon footprint are all different by each industry. 3.1.3. Moderating variable Regulatory stringency 15 / 29 Following the prior studies [e.g., 32, 38], I identified firms based on a standard industrial classification (SIC), operating in a stringent regulation in terms of environmental issues. A dichotomous variable, regulatory stringency, was coded ‘1’ for companies with a primary two-digit SIC code of mining (10), oil exploration (13), paper (26), chemical and allied products (28), petroleum refining (29), metals (33), or utilities (49), and ‘0’ for otherwise. 3.1.4. Control variables Environmental impacts To control environmental issues other than GHG emissions, I put five additional indicators of environmental impacts: water abstraction, general waste, land and water pollutant, air pollutant, and natural resource use. Trucost database offers a unique subset of GHG emissions. To resolve multicollinearity concerns raised by relatively high pair-wise correlations between some of environmental control variables, I dropped two variables: water abstraction and air pollutant. I checked multicollinearity by using variance inflation factors. As presented in Appendix A, all factors were below 10, suggesting that there is no multicollinearity issue [39]. For robustness check, I included the two variables and run same regression but it does not change the results. KLD environmental performance To control any effect of process-based environmental performance on financial performance, I obtained relevant data from KLD, which is the most widely adopted proxy for environmental performance. As shown in the Appendix B, KLD has been issuing environmental ratings for all members of the S&P 500 Index and Domini Social 400 Index since 1991. I aggregate environmental performance scores by two groups. KLD environmental concerns indicates a sum of all environmental concerns. KLD environmental strengths 16 / 29 indicates a sum of all environmental strengths. Disclosure To control any effect of voluntary behavior of disclosing environmental information on financial performance, I include a binary variable to take into account a variation across firms. I put ‘1’ if the environmental data was provided by the firm so that publicly available, and ‘0’ if the data was imputed by third parties using input-output (IO) economic model [45]. This variable allows to control for any potential bias based on a firm’s voluntarily disclosing behavior. Financial variables Following the previous studies of relationship between CER and CFP [14, 15], I includes several financial variables to control for firm-level heterogeneity. I obtained financial information from Compustat database. Total assets are included to account for variation in firm size. The ratio of total debt to total assets are also included to control firms’ leverage. To control effect of production variation on firm performance, I put growth variable, defined as the annual change in sales divided by total sales. Finally, I control capital intensity impact on firm performance by dividing capital expenditures by total sales. Each financial control variables is transformed using the natural logarithm to correct for skewed distributions. Industry dummy I put a series of dummies, indicating each firm’s primary industry using the 19 Industry Classification Benchmark (ICB) supersectors based on data from Trucost. 3.2. Data Analysis I used the random effect regression model, which achieves greater efficiency. However, 17 / 29 the random effect model imposes a strong assumption that an unobserved effect can be randomly distributed to each firm. To minimize this concern, I attempted to compare with fixed effect regression model. Unfortunately however, it was inappropriate to use fixed effect model in this study since the variable–regulatory stringency–was time-invariant. More importantly, the goal of this study is to make generalizable results to a wide range of industry. Therefore, I used the random effects model that favors to make general inferences about the relationship between carbon footprint and financial performance. 4. RESULTS -----------------------------------------Insert Table 1 about here ----------------------------------------------------------------------------------Insert Table 2 about here -----------------------------------------Table 1 displays the descriptive statistics and Table 2 shows the estimated random effects regression model using ROA as the dependent variable. In models (1)–(6) of Table 2, we test our hypotheses with and its interactions with regulatory stringency. In model (2), the coefficient for internal carbon footprint is significantly negative, supporting Hypothesis 1a, which suggests that CER in their internal operations are positively associated with ROA. In model (4), the coefficient of supply chain carbon footprint is also significantly negative, supporting Hypothesis 1b, predicting that CER in supply chain is positively associated with ROA. Model (5) in Table 2 adds the interaction term between supply chain carbon footprint and regulatory stringency variables in order to test Hypothesis 2. The interaction term is significantly positive, suggesting that the relationship between the level of carbon footprint in 18 / 29 supply chain and regulatory stringency is weakened for those firms within stringent regulation, thereby supporting Hypothesis 2. The main effect of supply chain carbon footprint, which is negatively associated with ROA in model (4), stay significantly negative in Model (5), suggesting its effect on ROA is not conditional on regulatory stringency. In model (3), I include the interaction term between internal carbon footprint and regulatory stringency variables to see whether the effect of internal carbon footprint on ROA is moderated by regulatory stringency. However, the coefficient of the interaction term does not have statistical significance. Among the control variables, the estimates for firm size and leverage are negatively associated with ROA and two of environmental impact control variables–general waste and natural resource use–show statistical significance across all models. Disclosure does not show an effect on ROA in Model (1)–(3) however, it becomes significantly positive in Model (4)– (6). Perhaps, voluntary behavior of disclosing carbon emissions is more relevant when considering supply chain carbon footprint. -----------------------------------------Insert Table 3 about here -----------------------------------------Table 3 shows the estimated random effects regression model using Tobin’s q as the dependent variable. In model (2), the coefficient for internal carbon footprint is significantly negative, supporting Hypothesis 3a, which suggests that the CER in their internal operations are positively with Tobin’s q. In model (4), the coefficient of supply chain carbon footprint is also significantly negative, supporting Hypothesis 3b, suggesting that CER in supply chain is positively associated with Tobin’s q. Model (5) in Table 3 adds the interaction term between supply chain carbon footprint and regulatory stringency variables in order to test Hypothesis 4. The interaction term is 19 / 29 significantly negative, suggesting that the relationship between carbon footprint in supply chain and regulatory stringency is strengthened by stringent regulation, thereby supporting Hypothesis 4. The main effect of supply chain carbon footprint, which is negatively associated with Tobin’s q in model (4), turns insignificant in Model (5), suggesting its effect on Tobin’s q is conditional on regulatory stringency. Among the control variables, the estimated KLD environmental concerns shows a positive effect on Tobin’s q. When looking at the financial variables, the estimates for firm size and leverage are negatively associated with Tobin’s q and estimates for growth and capital intensity are positively related to Tobin’s q across all models. Only one environmental impact control variable–natural resource pollutant–shows statistical significance. Regulatory stringency shows a positive effect on Tobin’s q. 5. Discussion Using Trucost data from 2003 to 2010, I demonstrate that higher levels of CER not only increase their short-term financial performance but also enhance their long-term financial performance. I further demonstrate that the companies’ CER in their supply chain also increase firms’ short-term and long-term financial performance. By providing a theoretical account for this relationship, I highlight the important role of improving CER especially in their supply chain as well as their internal operation. This study contributes to a natural resource-based view by extending “pay to be green” debate beyond the boundary of a firm. This study provides the evidence how important for firms to find greener suppliers with low carbon footprint [7]. As illustrated earlier, both Samsung and Wal-Mart examples present the firms’ efforts to reduce carbon emissions increase 20 / 29 sharing expertise, which in turn builds more fruitful knowledge about the supply chain network. I argue that outcome-based lower levels of carbon footprint implies that firms have higher capabilities to dealing with environmental responsibility. More importantly, this capabilities not only contribute to greener ecological environment but also enhance the firms’ competitive advantage. This research also contributes to stakeholder theory by exploring the relation between CER and market value (i.e., Tobin’s q) in terms of stakeholders’ perspective. Whereas it has been already discovered about stakeholders’ pressure on firms’ CER in their internal operation, I examine that stakeholders’ influence reaches far beyond the boundary of a firm, previously unexplored in the literature. In addition, I propose that regulatory stringency may hinder the positive CER effects on firms’ short-term financial gain but it improves long-term market value. This improves our understanding that regulatory stringency seems to be an obstacle to increase profitability however, in fact, regulatory stringency appears to be an another source of competitive advantage if well-managed. The present research has a number of limitations that may offer opportunities for further research. First, this study employs two-digit SIC code as a criterion to distinguish firms by regulatory stringency, following the [32, 38]. Future research could employ firm-level data to examine the regulatory pressures on individual firms for more rigorous measure of regulatory stringency. Second, as a proxy for CER, I use a level of carbon footprint, calculated by dividing firm-level GHG emissions by the firm’s revenue. For this calculation method, it is difficult in precise interpretation if lower levels of carbon footprint represent lower GHG emissions or higher levels of sales. Future studies can use more rigorous measure to avoid the potential bias. Nevertheless, I believe that the carbon footprint measure is a conservative test for my hypotheses. Finally, since this study aim to examine outcome-based CER, we do not 21 / 29 examine the effects of process-based CER effects. Future research could conduct comparative analysis by comparing firms with only process-based measure and outcome-based measure. This study suggests several implications for practitioners. First, policy makers need to consider both a focal firm and its supply chain. In particular, if a firm can influence over supply chain partners, then it might be reasonable for the firm to mitigate environmental concerns by transferring the burden of environmental responsibility to its supply chain, rather than by truly mitigating the environmental damages. Therefore, policy makers can make better decisions with a holistic approach and give proper incentives for a focal firm to mitigate environmental concerns by itself or collaborate with its supply chain partners. Second, managers should recognize the importance of understanding their supply chain network and collaborate with their partners to reduce carbon emissions. The overall empirical results indicate that reducing the carbon footprint is beneficial for firms’ own good as well as for the ecological environment. As more firms are connected and as more stakeholders show concern about the environment, managers need to pay more attention to environmental impacts generated from the firm’s whole business processes. As managers expand the boundary of decision-making factors, they could have higher capabilities to understand the complicated interdependency, to deal with stakeholders’ demand, and to place their firm to the center of a sustainable business network. The world faces the greatest unprecedented challenge that requires a paradigm shift to the new industrial revolution. 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Descriptive statistics Variables Mean S.D. Min Max (1) (1) ROA 0.13 0.11 -0.64 0.95 1 (2) Tobin's q 2.10 9.81 (3) Internal Carbon Footprint 3.19 2.22 -4.06 0.00 774.90 0.08 (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) 1 9.65 0.07 0.00 1 (4) Supply Chain Carbon Footprint 4.15 1.26 1.24 7.80 0.16 0.00 0.77 (5) Regulatory Stringency 0.23 0.42 0.00 1.00 0.03 -0.02 0.62 0.43 (6) KLD Environmental Concerns 0.47 0.97 0.00 5.00 -0.01 -0.18 0.51 0.43 0.49 (7) KLD Environmental Strengths 0.42 0.87 0.00 5.00 0.04 -0.07 0.12 0.21 0.16 0.32 (8) General Waste 0.82 1.85 -9.03 7.33 0.11 -0.02 0.41 0.50 0.29 0.54 0.35 (9) Land and Water Pollutants 0.94 2.06 -8.67 8.72 0.14 -0.01 0.42 0.56 0.30 0.51 0.36 0.90 (10) Natural Resource Use 1.00 2.13 -8.40 8.81 0.06 -0.02 0.56 0.60 0.35 0.58 0.26 0.88 0.85 (11) Firm Size 8.76 1.60 -0.72 14.63 -0.26 -0.05 -0.10 -0.15 0.05 0.32 0.25 0.51 0.44 0.44 (12) Leverage -1.70 1.20 -11.20 2.91 -0.11 -0.03 0.25 0.26 0.14 0.13 0.07 0.13 0.14 0.16 0.09 (13) Growth -2.18 1.16 -11.60 8.22 0.03 0.05 0.02 0.00 0.07 -0.03 -0.10 -0.17 -0.17 -0.12 -0.16 -0.07 (14) Capital Intensity -3.15 1.23 -8.24 8.55 0.00 0.02 0.44 0.28 0.40 0.19 0.03 -0.01 0.00 0.11 -0.04 0.17 0.15 (15) Disclosure 0.16 0.37 1.00 0.00 -0.03 0.18 0.21 0.26 0.35 0.45 0.39 0.37 0.35 0.30 0.05 -0.09 0.08 0.00 25 / 29 1 1 1 1 1 1 1 1 1 1 1 1 Table 2. The random effects regression model of return on assets KLD Environmental Concerns (t-1) KLD Environmental Strengths (t-1) General Waste Land and Water Pollutant Natural Resource Use Firm Size Leverage Growth Capital Intensity Disclosure Regulatory Stringency Industry Dummy Year Dummy Internal Carbon Footprint Internal Carbon Footprint * Regulatory Stringency Supply Chain Carbon Footprint Supply Chain Carbon Footprint * Regulatory Stringency Constant Model 1 -0.003 (0.00) -0.002 (0.00) 0.026*** (0.00) 0.019*** (0.00) 0.001 (0.00) -0.058*** (0.00) -0.006*** (0.00) 0.001 (0.00) -0.004† (0.00) 0.004 (0.00) -0.014 (0.01) Included Included Model 2 -0.003 (0.00) -0.002 (0.00) 0.026*** (0.00) 0.019*** (0.00) 0.002 (0.00) -0.059*** (0.00) -0.006*** (0.00) 0.001 (0.00) -0.003 (0.00) 0.004 (0.00) -0.010 (0.01) Included Included -0.003* (0.00) Model 3 -0.003 (0.00) -0.002 (0.00) 0.026*** (0.00) 0.019*** (0.00) 0.002 (0.00) -0.059*** (0.00) -0.006*** (0.00) 0.001 (0.00) -0.003 (0.00) 0.003 (0.00) -0.027 (0.02) Included Included -0.005* (0.00) 0.004 (0.00) Model 4 -0.003 (0.00) -0.001 (0.00) 0.027*** (0.00) 0.022*** (0.00) 0.003 (0.00) -0.063*** (0.00) -0.006*** (0.00) 0.001 (0.00) -0.003 (0.00) 0.007* (0.00) -0.009 (0.01) Included Included Model 5 -0.003 (0.00) -0.001 (0.00) 0.026*** (0.00) 0.023*** (0.00) 0.003 (0.00) -0.063*** (0.00) -0.006*** (0.00) 0.001 (0.00) -0.002 (0.00) 0.007* (0.00) -0.066* (0.03) Included Included -0.018*** (0.00) -0.022*** (0.00) 0.012* (0.01) 0.509*** 0.525*** 0.530*** 0.632*** 0.651*** (0.03) (0.03) (0.03) (0.04) (0.04) Observations 3330 3328 3328 3330 3330 R-squared 0.2489 0.2521 0.2503 0.2558 0.2558 Wald Chi-squared 727.15*** 732.15*** 733.79*** 764.80*** 769.66*** Standard errors appear in parentheses. †, *, **, *** indicates statistical significance at the 10%, 5%, 1%, and 0.1% level, respectively. 26 / 29 Model 6 -0.003 (0.00) -0.001 (0.00) 0.026*** (0.00) 0.022*** (0.00) 0.004 (0.00) -0.063*** (0.00) -0.006*** (0.00) 0.001 (0.00) -0.002 (0.00) 0.006* (0.00) -0.066* (0.03) Included Included -0.002 (0.00) 0.001 (0.00) -0.021*** (0.00) 0.011† (0.01) 0.652*** (0.04) 3328 0.2559 770.03*** Table 3. The random effects regression model of Tobin’s Q KLD Environmental Concerns (t-1) KLD Environmental Strengths (t-1) General Waste Land and Water Pollutant Natural Resource Use Firm Size Leverage Growth Capital Intensity Disclosure Regulatory Stringency Industry Dummy Year Dummy Internal Carbon Footprint Internal Carbon Footprint * Regulatory Stringency Supply Chain Carbon Footprint Supply Chain Carbon Footprint * Regulatory Stringency Constant Model 1 0.116*** (0.03) -0.044 (0.03) 0.047 (0.05) 0.020 (0.05) 0.098* (0.04) -0.723*** (0.04) -0.139*** (0.02) 0.113*** (0.01) 0.188*** (0.03) 0.013 (0.04) 0.437** (0.16) Included Included Model 2 0.122*** (0.03) -0.048 (0.03) 0.051 (0.05) 0.014 (0.05) 0.118** (0.04) -0.738*** (0.04) -0.137*** (0.02) 0.114*** (0.01) 0.198*** (0.03) 0.001 (0.04) 0.507** (0.16) Included Included -0.063* (0.02) Model 3 0.123*** (0.03) -0.047 (0.03) 0.058 (0.05) 0.007 (0.05) 0.118** (0.04) -0.738*** (0.04) -0.138*** (0.02) 0.113*** (0.01) 0.197*** (0.03) 0.007 (0.04) 0.806** (0.26) Included Included -0.037 (0.03) -0.071 (0.05) Model 4 0.116*** (0.03) -0.040 (0.03) 0.051 (0.05) 0.037 (0.05) 0.116** (0.04) -0.754*** (0.04) -0.136*** (0.02) 0.113*** (0.01) 0.195*** (0.03) 0.028 (0.04) 0.461** (0.16) Included Included Model 5 0.120*** (0.03) -0.038 (0.03) 0.060 (0.05) 0.024 (0.05) 0.117** (0.04) -0.751*** (0.04) -0.137*** (0.02) 0.114*** (0.01) 0.188*** (0.03) 0.031 (0.04) 1.421** (0.44) Included Included -0.107* (0.05) -0.049 (0.05) -0.198* (0.08) 7.918*** 8.223*** 8.144*** 8.658*** 8.326*** (0.46) (0.48) (0.48) (0.57) (0.58) Observations 3338 3336 3336 3338 3338 R-squared 0.3799 0.3848 0.3872 0.3827 0.3859 Wald Chi-squared 1290.32*** 1301.21*** 1305.53*** 1296.93*** 1306.72*** Standard errors appear in parentheses. †, *, **, *** indicates statistical significance at the 10%, 5%, 1%, and 0.1% level, respectively. 27 / 29 Model 6 0.125*** (0.03) -0.043 (0.03) 0.065 (0.05) 0.013 (0.05) 0.130** (0.04) -0.757*** (0.04) -0.136*** (0.02) 0.114*** (0.01) 0.195*** (0.03) 0.021 (0.05) 1.500*** (0.44) Included Included -0.038 (0.03) -0.037 (0.05) -0.034 (0.06) -0.172† (0.09) 8.423*** (0.58) 3336 0.3899 1314.53*** Figure 1. Sample composition The number of observations (firm-years) by sector Utilities Travel & Leisure Telecommunications Technology Retail Real Estate Personal & Household Goods Oil & Gas Media Insurance Industrial Goods & Services Healthcare Food & Beverage Financial Services Construction & Materials Chemicals Basic Resources Banks Automobiles & Parts 0 200 400 600 800 1000 1200 1400 Frequency Figure 2. Sample composition Greenhouse gas emissions (Average) Utilities Travel & Leisure Telecommunications Technology Retail Real Estate Personal & Household Goods Oil & Gas Media Insurance Industrial Goods & Services Healthcare Food & Beverage Financial Services Construction & Materials Chemicals Basic Resources Banks Automobiles & Parts 0 5 10 15 20 25 30 CO2-equivalent (million tons) Internal Carbon Footprint Supply Chain Carbon Footprint 28 / 29 APPENDIX A. Variance inflation factors–Multicollinearity test Variable General Waste Natural Resource Use Land and Water Pollutant Supply Chain Carbon Footprint Internal Carbon Footprint Firm Size KLD Environmental Concerns (t-1) Regulatory Stringency Capital Intensity Disclosure KLD Environmental Strengths (t-1) Leverage Growth Mean VIF VIF 7.09 6.35 5.52 4.35 4.08 2.94 1.98 1.94 1.58 1.35 1.28 1.13 1.08 3.13 APPENDIX B. List of KLD environmental performance Environmental Concerns Hazardous Waste Regulatory Problems Ozone Depleting Chemicals Substantial Emissions Agriculture Chemicals Climate Change (from 1999) Negative Impact of Products and Services Land Use & Biodiversity Non Carbon Releases Supply Chain Management Water Management Environment Other Concerns Environment - Number of Concerns Environmental Strengths Beneficial Products and Services Pollution Prevention Recycling Clean Energy Property, Plant, Equipment (through 1995) Management Systems Strength Water Stress Biodiversity & Land Use Raw Material Sourcing Environment Other Strength Environment - Number of Strengths 29 / 29
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