The Effects of Changes in State Tax Enforcement on Corporate Income Tax Collections

Using a new hand-collected database on state department of revenue (DOR) expenditures, this study examines the association between changes in state corporate tax enforcement expenditures and state-level tax collections during the 2000–2008 time period. The results, after addressing endogeneity concerns using a changes specification and state fixed effects, suggest a $1 increase (decrease) in current period corporate enforcement is associated with an $8 to $11 increase (decrease) in state tax collections two years into the future. The association appears to be attenuated in states with restrictive tax policies (i.e., unitary/combined reporting and related-party add-back provisions) suggesting that enforcement and restrictive tax policies could serve as substitutes. JEL Classifications: H26; H71; H72. Data Availability: Enforcement data were hand collected from state revenue department annual reports and by contacting state corporate income tax personnel. All annual reports are publicly available.