Governance-ESG Integration and the Cost of Equity Capital in Nigerian Listed Firms: An Empirical Analysis

This study empirically examines the relationship between governance-ESG integration and the cost of equity capital in listed Nigerian firms. The integration of environmental, social, and governance considerations into corporate strategy and reporting has been linked in international literature to reduced investor risk perceptions, lower equity risk premiums, and ultimately a lower cost of equity capital. In Nigeria, growing regulatory and investor pressure for ESG disclosures creates an opportunity to examine whether ESG governance integration delivers measurable financial benefits to adopting firms. Drawing on the information asymmetry model, investor risk pricing theory, and stakeholder governance literature, this study constructs an ESG integration governance score for thirty listed firms using annual report content analysis aligned with the Global Reporting Initiative and the Nigerian Sustainability Reporting Guidelines. The cost of equity capital is estimated using the implied cost of equity approach derived from analyst earnings forecasts. Panel regression analysis spans seven years, controlling for firm size, leverage, market risk, and profitability. The study addresses the absence of empirical evidence on the governance-ESG-cost of capital nexus in the Nigerian context, where ESG adoption is still at an early stage. Findings will assist corporate governance officers, investor relations teams, and capital market regulators in building the business case for ESG governance integration. Keywords: ESG integration, cost of equity capital, corporate governance, listed firms, Nigeria.