Tax Base Composition and Revenue Volatility: Evidence from the U.S. States

This study examines the effect of tax base composition on revenue volatility, with focus on state general sales tax and individual income tax. In doing so, extensive historical data (1992-2007) are presented on state taxation of various categories of sales and incomes that exhibit wide cross-state variations in taxable status, and revenue volatility is measured using the deviation-from-trend approach. Models of sales and income tax volatility are estimated using pooled OLS, and the analyses reveal that revenue volatility is significantly affected by how the tax base is composed. The paper concludes by discussing the policy implications of the results.