The Impact of Top Management Team Heterogeneity on the ESG performance in Chinese Listed Enterprises

Abstract

In the context of deepening corporate sustainability strategies, ESG performance has become a key indicator for assessing corporate governance effectiveness and long‑term value‑creation capacity. This dissertation aims to examine the mechanism through which top management team (TMT) heterogeneity influences corporate ESG performance. Drawing on Upper Echelons Theory, Stakeholder Theory and Agency theory, it constructs an integrated research framework that incorporates direct effects, institutional moderating effects, and the mediating role of internal control, seeking to unveil the “governance black box” through which executive characteristics drive ESG outcomes. This dissertation selects Chinese A‑share listed companies from 2015 to 2023 as the research sample. TMT heterogeneity is measured across six dimensions, including age, gender, education, professional background, financial background, and overseas experience background. Methodologically, panel regressions, moderated‑effect models, and Bootstrap‑based mediation tests are employed. By integrating the DIB Internal Control Index, including its sub‑dimensions and CSI ESG rating data, the dissertation provides an in-depth examination of the pathways through which TMT heterogeneity influences ESG performance under varying contextual conditions. The findings reveal a structurally distinct influence of TMT heterogeneity on ESG performance. Heterogeneity in professional background and overseas experience exerts a robust direct positive effect on ESG outcomes. In contrast, age heterogeneity and financial background heterogeneity significantly inhibit the improvement of ESG performance. Institutional environment plays a critical moderating role in the above relationships. State ownership exerts a significant moderating effect on the relationships between all six dimensions of heterogeneity and ESG performance. At the same time, regional institutional environment results in distinct geographical divergence in the effects of professional, overseas, age, and financial background heterogeneity. Mechanism analysis indicate that the internal control system serves as a core governance infrastructure through which TMT characteristics are transmitted to ESG performance. Expecially, the results reveal a full mediation effect for age heterogeneity on ESG performance via compliance and strategic controls. While financial background heterogeneity exerts its influence through operational and compliance controls, which function as partial mediators. Moreover, these mediation pathways are more pronounced in state-owned enterprises (SOEs), demonstrating a significant “moderated mediation” pattern. Notably, the governance value of gender heterogeneity is highly contingent on institutional context, exerting an effect only in SOEs and operating through the operational control dimension of internal control. This dissertation reveals the institutional contingency of TMT governance effectiveness and the central role of internal governance mechanisms. The findings not only extend the application of Upper Echelons Theory into the sustainability domain but also provide empirical grounding and policy implications for firms seeking to optimize executive composition and enhance ESG governance in transitional economies.