Global Warming Disclosures: Impact of Kyoto Protocol Across Countries

The Kyoto Protocol that went into effect in February 2005 set limits on the amount of greenhouse gas (GHG) emissions. We document in this study that firms from countries ratifying the Protocol and setting limits on GHG emissions (i.e., European Union [EU] countries, Canada and Japan) are associated with higher GHG disclosures compared with firms in the United States, which has not ratified the Protocol. Additionally, we document that firms from India, which has not set any limits on GHG emissions, make even less GHG disclosures than firms from all other countries covered in this study. Our findings also show that GHG disclosures are greater for Canadian and Japanese firms compared with firms from the EU countries and that they also differ somewhat across EU firms. These findings suggest that ratification of the Protocol and limits on emissions improve pollution disclosures. In the absence of Protocol ratification, mandatory disclosure requirements may be needed to ensure adequate and reliable pollution disclosures.