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Non-financial reporting (NFR) is viewed as a major step towards organisational transparency and accountability. While the number of non-financial reports published every year has been growing exponentially over the last two decades, their quality and effectiveness in managing environmental, social and governance (ESG) performance have been questioned. Addressing these concerns, several jurisdictions, including EU Member States, introduced mandatory NFR regimes. However, the evidence on whether such regulation truly translates into enhanced ESG performance remains scarce. This paper aims to fill this gap in the literature by investigating the impact of the EU’s Directive 2014/95/EU (Non-financial Reporting Directive, NFRD) on the ESG scores of Polish companies.

Drawing upon institutional and strategic perspectives on legitimacy theory, the authors test the relationship between the introduction of the NFRD and the ESG scores derived from the Refinitiv database, using a sample of all those companies listed on the Warsaw Stock Exchange whose disclosure allows for measuring ESG performance (yielding 171 firm-year observations from 43 companies).

This study’s findings show an improvement of ESG performance following the introduction of the NFRD. The difference-in-differences approach indicates that the improvement is larger for companies that are subject to the legislation when it comes to overall ESG performance, particularly for environmental and social performance. Nonetheless, to the best of the authors’ knowledge, no significant effect is found for performance in the governance dimension.

This study investigates the role of transnational mandatory reporting regulation in the first years of its enactment. The evidence offers insights into the effects of disclosure legislation in the context of an underdeveloped institutional environment.