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The Costs of Corporate Tax Complexity -- by Eric Zwick

Does tax code complexity alter corporate behavior? This paper investigates this question by focusing on the decision to claim refunds for tax losses. In a sample of 1.2M observations from the population of corporate tax returns, only 37% of eligible firms claim their refund. A simple cost-benefit analysis of the tax loss choice cannot explain low take-up, which motivates an investigation of how tax complexity alters this calculation. A research design exploiting tax preparer switches, deaths, and relocations shows that sophisticated preparers increase the claiming behavior of small and mid-market firms. Tax complexity decreases take-up among large firms through interactions of refund claims with other tax code provisions and with the audit process.