Truth-telling by Third-party Auditors and the Response of Polluting Firms: Experimental Evidence from India

Esther Duflo, Michael Greenstone, Rohini Pande, Nicholas Ryan

NBER Working Paper No. 19259
Issued in July 2013
NBER Program(s):Development Economics, Environment and Energy Economics, Industrial Organization, Law and Economics, Public Economics

In many regulated markets, private, third-party auditors are chosen and paid by the firms that they audit, potentially creating a conflict of interest. This paper reports on a two-year field experiment in the Indian state of Gujarat that sought to curb such a conflict by altering the market structure for environmental audits of industrial plants to incentivize accurate reporting. There are three main results. First, the status quo system was largely corrupted, with auditors systematically reporting plant emissions just below the standard, although true emissions were typically higher. Second, the treatment caused auditors to report more truthfully and very significantly lowered the fraction of plants that were falsely reported as compliant with pollution standards. Third, treatment plants, in turn, reduced their pollution emissions. The results suggest reformed incentives for third-party auditors can improve their reporting and make regulation more effective.

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Document Object Identifier (DOI): 10.3386/w19259

Published: Esther Duflo & Michael Greenstone & Nicholas Ryan, 2013. "Truth-telling by Third-party Auditors and the Response of Polluting Firms: Experimental Evidence from India," The Quarterly Journal of Economics, Oxford University Press, vol. 128(4), pages 1499-1545. citation courtesy of

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