Résumé en anglais

What is the impact of voluntary corporate environmental disclosures on the cost of equity? The present study will attempt to answer this question. The empirical research is based on companies listed in the French SBF 120 stock market index. In 2006, most of these companies devoted a section of their annual report to environmental actions, yet fewer than 20% of them actually published a separate report dedicated to the issue of sustainable development. Regardless of the selected medium, the environmental topics receiving the most attention in corporate reporting are pollution, natural resources and recycling. The determinants associated with environmental disclosure are: company size, financial leverage, and the number of financial analysts monitoring company stock. This study does not lead to concluding that companies disclosing environmental information necessarily lower the cost of equity.