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Abstract
This study examines the effect of greenhouse gas emission disclosure and environmental performance on firm value from the perspective of signaling theory. The research focuses on mining companies listed on the Indonesia Stock Exchange during the 2021–2024 period. Firm value is proxied by Tobin’s Q, greenhouse gas emission disclosure is measured using a content analysis–based disclosure index, and environmental performance is represented by the PROPER rating. Panel data are analyzed using multiple linear regression. The results indicate that greenhouse gas emission disclosure has a positive and significant effect on firm value, suggesting that emission disclosure serves as a credible sustainability signal for investors. In contrast, environmental performance measured through PROPER does not significantly affect firm value, indicating that compliance-based environmental indicators have limited signaling power in capital markets. Financial control variables, including profitability, leverage, and firm size, function as control factors in explaining firm value. This study contributes to the signaling theory literature by highlighting that different types of environmental signals possess varying strengths in influencing firm value, particularly in the context of emerging capital markets. The findings also provide insights for managers and regulators regarding the importance of enhancing quality of environmental disclosure beyond minimum regulatory compliance
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Copyright (c) 2026 DELISA LESTARI, BAIHAQI BAIHAQI

This work is licensed under a Creative Commons Attribution 4.0 International License.

This work is licensed under a Creative Commons Attribution 4.0 International License.
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References
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References
Afnilia, F., & Christina Dwi Astuti. (2023). Pengaruh Volume Emisi Karbon, Pengungkapan Emisi Karbon, Dan Tata Kelola Perusahaan Terhadap Nilai Perusahaan. Jurnal Ekonomi Trisakti, 3(2), 3795–3804. https://doi.org/10.25105/jet.v3i2.17992
Anggraeni, D. Y. (2015). Pengungkapan Emisi Gas Rumah Kaca, Kinerja Lingkungan, Dan Nilai Perusahaan. Jurnal Akuntansi Dan Keuangan Indonesia, 12(2), 188–209. https://doi.org/10.21002/jaki.2015.11
Asyifa, D. A., & Burhany, D. I. (2022). Pengungkapan Emisi Karbon dan Kinerja Lingkungan. Jurnal Internasional Seni Dan Ilmu Sosial, Volume 5 E, 193–203.
Bae Choi, B., Lee, D., & Psaros, J. (2013). An analysis of Australian company carbon emission disclosures. Pacific Accounting Review, 25(1), 58–79. https://doi.org/10.1108/01140581311318968
Citraningtyas, T., Athallah, A. B., Widagdo, A. K., & Ika, R. (2025). dan Kepemilikan Institusional terhadap Nilai Perusahaan : Bukti dari Industri Pertambangan di Indonesia. 04002, 1–8.
Hafizza Tasya Agatha, & Titik Aryati. (2024). 16288-16308. Journal Of Social Science Research, 4, 16288–16308. https://j-innovative.org/index.php/Innovative
Hardiyansah, M., Agustini, A. T., & Purnamawati, I. (2021). The Effect of Carbon Emission Disclosure on Firm Value: Environmental Performance and Industrial Type. Journal of Asian Finance, Economics and Business, 8(1), 123–133. https://doi.org/10.13106/jafeb.2021.vol8.no1.123
IEA. (2024). global-methane-tracker-2024 @ www.iea.org. https://www.iea.org/reports/global-methane-tracker-2024
Kompas. (2025). IEA: Emisi Metana Tambang Batu Bara Indonesia Terbesar Ketiga Dunia. Kompas.Com. https://lestari.kompas.com/read/2025/05/08/091400786/iea--emisi-metana-tambang-batu-bara-indonesia-terbesar-ketiga-dunia?utm_source=chatgpt.com
Kurnia, P., Nur, D. P. E., & Putra, A. A. (2021). Pengungkapan Emisi Karbon dan Nilai Perusahaan: Studi tentang Perusahaan Manufaktur di Indonesia dan Australia. Jurnal Internasional Ekonomi Energi Dan Kebijakan, 11, 83–87.
Matthews, L., Gerged, A. M., & Elheddad, M. (2025). Carbon disclosure, greenhouse gas emissions and market value of FTSE 350 firms–evidence from voluntary carbon disclosers versus non-disclosers. Accounting Forum, 49(4), 778–802. https://doi.org/10.1080/01559982.2024.2377470
Mongabay. (2025). Pemerintah Abai Kerusakan Kabaena Demi Nikel? Mongabay. https://mongabay.co.id/2025/05/12/pemerintah-abai-kerusakan-kabaena-demi-nikel/
Pradnyawati, Ida Ayu Kade; Werastuti, D. N. S. (2024). Pengaruh Pengungkapan Emisi Karbon, Biaya Lingkungan, dan Good Corporate Governance terhadap Nilai Perusahaan. Vokasi : Jurnal Riset Akuntansi, 13(1), 15–26. https://doi.org/10.23887/vjra.v13i1.74430
Putri, F. M., Asmi, Z., & Rodiah, S. (2024). Pengungkapan Emisi Karbon, Kinerja Lingkungan dan Penerapan Green Accounting Terhadap Nilai Perusahaan di BEI 2021-2023. EKOMA : Jurnal Ekonomi, Manajemen, Akuntansi, 4(1), 483–495. https://doi.org/10.56799/ekoma.v4i1.5230
Reuters. (2025). Indonesia revokes nickel ore mining permits in Raja Ampat after protest. Reuters. https://www.reuters.com/sustainability/indonesia-revokes-nickel-ore-mining-permits-raja-ampat-after-protest-2025-06-10/?utm_source=chatgpt.com
Sekar, A. (2023). The Influence Of Green Accounting, Environmental Performance, And ESG Disclosure On The Profitability. 1–15.
Spence, M. (1973). Spence1973. The Quarterly Journal of Economics, 87(3), 355–374. http://www.jstor.org/stable/1882010
Tobin, J. (1969). A General Equilibrium Approach To Monetary Theory Author ( s ): James Tobin Published by : Ohio State University Press Stable URL : https://www.jstor.org/stable/1991374 A General Equilibrium Approach To Monetary Theory. Journal of Money, Credit and Banking, 1(1), 15–29.
Toly, A. A., Ekonomi, F., & Petra, U. K. (2019). Pengaruh Pengungkapan Emisi Gas Rumah Kaca dan Kinerja Lingkungan Terhadap Nilai Perusahaan : Bukti Indonesia Jurnal IlmiahAkuntansi. 14(1), 106–119.
Widagdo, A. K., Ika, S. R., Neni, M. F., & Arwi, H. (2023). Apakah pengungkapan emisi karbon dan kinerja lingkungan meningkatkan nilai perusahaan ? Bukti dari industri dengan emisi tinggi di Indonesia. 04002.