Purpose - This study aims to examine the effect of carbon emission disclosure and green accounting on firm value, with green competitive advantage as a mediating variable.Methods - This study employs a quantitative approach using pooled ordinary least squares (OLS) regression with cluster-robust standard errors at the firm level. Mediation testing is conducted using the causal steps approach, the Sobel test, and bootstrap procedures. The sample comprises 446 non-financial companies listed on the Indonesia Stock Exchange (BEI) during the 2023-2024 fiscal years, yielding 892 firm-year observations.Findings - Carbon disclosure directly boosts firm value; green accounting only works through green competitive advantage, which mediates both. An 8‑dimension disclosure model outperforms the 6‑dimension one.Research implications - These findings reinforce stakeholder theory, legitimacy theory, signaling theory, and the natural resource-based view (NRBV) by affirming that sustainability practices create market value when they are able to form a green competitive advantage that can be recognized by investors.Originality - The originality of this study lies in the use of the eight-dimension carbon emission disclosure model as a more comprehensive measurement, as well as the testing of the mediating role of green competitive advantage within the integrated framework of the relationship between carbon emission disclosure, green accounting, and firm value.
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