Martin B. Knudsen
Danish Inland Revenue
NBER Working Papers and Publications
|February 2010||Unwilling or Unable to Cheat? Evidence from a Randomized Tax Audit Experiment in Denmark|
with Henrik J. Kleven, Claus T. Kreiner, Søren Pedersen, Emmanuel Saez: w15769
This paper analyzes a randomized tax enforcement experiment in Denmark. In the base year, a stratified and representative sample of over 40,000 individual income tax filers was selected for the experiment. Half of the tax filers were randomly selected to be thoroughly audited, while the rest were deliberately not audited. The following year, "threat-of-audit" letters were randomly assigned and sent to tax filers in both groups. Using comprehensive administrative tax data, we present four main findings. First, we find that the tax evasion rate is very small (0.3%) for income subject to third-party reporting, but substantial (37%) for self-reported income. Since 95% of all income is third-party reported, the overall evasion rate is very modest. Second, using bunching evidence around large an...
Published: Kleven, Henrik, Martin Knudsen, Claus Kreiner, So ren Pedersen , and Emmanuel Saez “ U nwilling or Unable to Cheat? Evidence from a Tax Audit Experiment in Denmark ” , Econometrica 79(3), 2011, 651 - 692.