The Laffer curve and "illicit cash" in simple macroeconomic models paper prepared for the 20. general conference of the Internat. Assoc. for Research in Income and Wealth, Rome, Italy, Session 9, Aug. 29, 1987 - Petersen, Hans-Georg 1946- (Justus-Liebig-Univ., Fachbereich Wirtschaftswiss., 1987)