<![CDATA[Purpose – This study examines the effect of carbon emission disclosure, eco-efficiency, and enterprise risk management disclosure on firm value in IDX80 companies on the Indonesia Stock Exchange during 2020–2024, with profitability, leverage, and firm size controls. Grounded in signaling and legitimacy theories, this study addresses inconsistent evidence regarding the value relevance of non-financial disclosure. Methods – This quantitative study uses panel data from annual and sustainability reports. The sample comprises 31 companies and 155 firm-year observations selected through purposive sampling. Firm value is measured using Tobin’s Q, carbon emission disclosure using seven GRI 305 items, eco-efficiency using ISO 14001 certification, and enterprise risk management disclosure using 20 COSO ERM items. ROA, DER, and firm size are included as controls. Data were analyzed using EViews 13 with a Fixed-Effects Model and cross-sectionally clustered White period-robust standard errors. Findings – The overall fixed-effect model is statistically significant, with an adjusted R-squared of 86.45%, indicating explanatory power after accounting for predictors, controls, and fixed effects. However, CED, EE, and ERMD do not have significant individual effects on firm value. ROA, DER, and firm size are insignificant. The robustness check confirms that these disclosure variables remain insignificant, while DER has a negative effect post-pandemic. Research implications – The findings indicate that non-financial disclosure must be credible, measurable, and linked to performance outcomes to become value-relevant. Originality – This study integrates three non-financial disclosure variables into a firm value model for IDX80 companies, includes financial control variables, and conducts post-pandemic robustness testing.]]>
