Cebula, Richard J. “The Underground Economy in the U.S.A.: Preliminary New Evidence on the Impact of Income Tax Rates (and Other Factors) on Aggregate Tax Evasion 1975-2008”. PSL Quarterly Review 67, no. 271 (December 18, 2014). Accessed April 19, 2024. https://rosa.uniroma1.it/rosa04/psl_quarterly_review/article/view/13024.