RECONSIDERING TAX EXPENDITURE ESTIMATION: CHALLENGES AND REFORMS by Rosanne Altshuler Rutgers University
[email protected] and Robert D. Dietz National Association of Home Builders
[email protected] This draft: June 2, 2008 Abstract We examine the measurement of tax expenditures and offer recommendations aimed at improving their value to analysts and policymakers. We use calculations from NBER’s TAXSIM to illustrate some of the problems with the current methodology for estimating tax expenditures. Unlike most previous work on the topic, we focus on how features of the current tax system complicate and compromise the value of information provided by the tax expenditure budget. Our recommendations for reform include presenting revenue estimates for major tax expenditures, reporting some negative tax expenditures, grouping expenditures by conceptually- linked categories, and establishing an appendix for tax expenditure estimates of permanent versions of expiring provisions and AMT interaction effects. This paper was prepared for presentation at the NBER Conference, “Incentive and Distributional Consequences of Tax Expenditures,” held in Bonita Springs, FL on March 27-29, 2008. We thank Daniel Feenberg for providing invaluable help with TAXSIM. We thank Thomas Barthold, Edward Kleinbard, and conference attendees for valuable comments. We also thank Patrick Driessen for helpful comments on an earlier draft and Gary Koenig and Tim Dowd for useful suggestions. Nothing in this paper should be construed as reflecting the views of the National Association of Home Builders or its members. INTRODUCTION To most tax policy analysts, the term “tax expenditure” means a special provision of the tax system that results in reduced tax liability for certain subsets of taxpayers.