„The Effective Rate of Interest on Target Balances“, CESifo Working Paper Nr. 7878, September 2019.

„Pareto Optimality in the Extraction of Fossil Fuels and the Greenhouse Effect: A Note“,CESifo Working Paper Nr. 2083, 2007 (Download, 279 KB), NBER Working Paper Nr. 13453, 2007.

„The Minimum Inflation Rate for Euroland“ (zusammen mit M. Reutter), CESifo Working Paper Nr. 377, 2000 (Download, 145 KB); NBER Working Paper Nr. 8085, 2001.

„Participation, Capitalization and Privatization, Report on Bolivia's Current Political Privatization Debate“ (zusammen mit Gerlinde Sinn), CESifo Working Paper Nr. 49, 1993 (Download, 3.6 MB).