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The Relevance to Investors of Greenhouse Gas Emission Disclosures

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  • Paul A. Griffin
  • David H. Lont
  • Estelle Y. Sun

Abstract

This study finds that investors price firms' greenhouse gas (GHG) emissions as a negative component of equity value, and this valuation discount does not differ between firms that voluntarily disclose to the Carbon Disclosure Project (CDP) and nondisclosing firms. We derive the GHG emissions for nondisclosers from an estimation model that incorporates firm characteristics and industry. The finding that investors view CDP amounts and estimates of emissions as equally value†relevant suggests that equity values reflect GHG information from channels other than the CDP. An event study of investors' response to emission†related information in firms' 8†K filings further supports this finding. Economically, our results suggest that, for the median S&P 500 firm, GHG emissions impose a market†implied equity discount of $79 per ton, representing about one†half of 1 percent of market capitalization.Les auteurs constatent que les investisseurs assimilent les émissions de gaz à effet de serre (GES) des sociétés à une composante négative de leur valeur nette, cette décote n'étant pas différente selon que les sociétés fournissent de l'information facultative dans le cadre du Carbon Disclosure Project (CDP) ou s'en abstiennent. Les auteurs estiment les émissions de GES des sociétés qui ne communiquent pas cette information à partir d'un modèle incorporant les caractéristiques des sociétés et leur secteur d'activité. L'observation selon laquelle les investisseurs jugent les données du CDP et les estimations relatives aux émissions tout aussi pertinentes en ce qui a trait à la valeur donne à penser que les valeurs nettes des sociétés reflètent l'information relative aux GES provenant d'autres sources que le CDP. Une étude événementielle de la réaction des investisseurs à l'information liée aux émissions touchant les sociétés qui produisent la déclaration 8†K vient confirmer cette observation. Sur le plan économique, les résultats de l'étude laissent croire que, pour la société médiane du palmarès S&P 500, les émissions de GES infligent une décote implicite du marché de 79 $ la tonne, représentant environ 0,5 pour cent de la capitalisation boursière.

Suggested Citation

  • Paul A. Griffin & David H. Lont & Estelle Y. Sun, 2017. "The Relevance to Investors of Greenhouse Gas Emission Disclosures," Contemporary Accounting Research, John Wiley & Sons, vol. 34(2), pages 1265-1297, June.
  • Handle: RePEc:wly:coacre:v:34:y:2017:i:2:p:1265-1297
    DOI: 10.1111/1911-3846.12298
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