We provide survey evidence regarding taxpayer perceptions of two important tax expenditures — the charitable contribution deduction (CD) and the home mortgage interest deduction (HMID). We find that taxpayers have a flawed understanding of both programs. Taxpayers underestimate their...

Tax expenditure estimates are viewed with skepticism even within the fraught business of forecasting the revenue effects of policies. As the Joint Committee on Taxation emphasizes, Unlike revenue estimates, tax expenditure estimates do not incorporate any behavioral response of taxpayers or...