Over-investment and ESG inequality

This study aims to test whether over-investment is associated with environmental, social and governance (ESG) variation (i.e. inequality) across its dimensions, which, if so, would imply the prioritization of the interests of some stakeholders over those of others.

Drawing on a global sample of 29,428 observations across nine sectors and 41 countries between 2003 and 2019, the authors executed a country-industry-year fixed-effects regression analysis. In the robustness tests, this study also used the entropy balancing and propensity score matching approaches.

The authors found that while firm over-investment increases social pillar inequality, it reduces environmental pillar inequality. Further analysis revealed that the over-investment strategy decreases (increases) ESG inequality in low (high) environmental and social performers. This outcome could be of relevance to internal governance mechanisms and policymaking as ESG inequality might raise legitimacy concerns and hamper the long-term sustainability of firms.

The outcome of the study could be of relevance to internal governance mechanisms as well as policymaking. Considering financial constraints, firms should maintain a balanced strategy between firm investment and addressing stakeholder interests. Otherwise, over-investment might reduce environmental and social engagement in some dimensions, which could prompt criticisms and legitimacy concerns about firms and some stakeholders.

Past research has intensively focused on whether ESG – rather than ESG inequality – is associated with investment (in)efficiency. In addition, it has mostly formulated the causality running from ESG to firm investment, and hence, the literature lacks heterogeneity in this respect. Nevertheless, the authors believe that the potential effect of firm investment on ESG is of critical importance and has implications for determining whether over-investment causes variations across ESG engagement. Thus, the authors addressed this gap in the literature by investigating the relationship between over-investment and ESG inequality.