The introduction of information reporting and pre-population of charitable tax deductions in Denmark in 2008 coincided with a doubling in the number of tax deductions claimed, and a 15 percent rise in the value of claims. We attribute this change to incomplete claiming of eliglbe charitable tax...

What determines the efficiency cost of taxation in the presence of optimization errors? Employing recent results quantifying efficiency cost when consumers are subject to biases, this paper shows how budget adjustment rules, debiasing, and the nature of tax perception affect efficiency cost....

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...