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α: calibrated so average coauthorship-adjusted count equals average raw count
We examine the impact of enforcement on subsequent compliance behavior by taxpayers. Exploiting waves of randomized audits by the Internal Revenue Service from 2006 to 2009, we find three long-run responses by taxpayers. First, audits increase tax payments substantially in following years, but this effect is short-lived when third-party reporting is not available. Second, taxpayers with high income volatility revert to their preaudit behavior quickly. Third, sophisticated taxpayers are affected less by enforcement. These responses reveal how taxpayers perceive the enforcement risk and change their noncompliance according to the dynamics of the information barrier between them and the enforcement agency.