Widespread Revisions of Self-Reported Emissions by Major U.S. Corporations

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Abstract

We find that 59% of public firms’ self-reported emissions were later revised, a rate that’s remained consistent for a decade. Firms are more likely to understate than overstate, and the amount of understated emissions is more than twice the value of overstated emissions. Factors such as assurance and changes to measurement methodology do not explain the likelihood of revisions, and commercial data providers do not appear to correct these revisions.

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