- The Jerome Levy Institute at Bard College, Annandale-on Hudson, New York, USA
                                  * March 1998
                                  * July 1998

- New School for Social Research, New York, USA
                                  * October 1996, seminar
                                  * March 1998, to participate to the jury of a Ph.D thesis
                                  * October 2000, seminar

- University of Massachusets, Harbour Campus, Boston, USA
                                  * September 2000, seminar

- University of Ottawa, Canada
   as adjunct professor, fall term 1996, 1997, 1998, 1999, 2000

- Kalamazoo College, Kalamazoo, Michigan, USA
  as distinguished fellow of the year-Center for European Studies- October 1999

- University of Notre Dame, Notre Dame, Indiana, USA
   Participation to a conference on Macroeconomic Theory, May 2002

- Free University of Berlin, Germany
   Participation to a conference on Monetary Theory, March 2001

- University of Venezia, Italy
  Two conferences, April 1999

- University College, London School of Economics, London, UK
   December 2001, Participation to a conference on the progress of Post-Keynesian Economics
   organised by Victoria Chick, Philip Arestis, Meghnad Desai and Sheila Dow

- University of Trier (Trèves), Germany and Review of Political Economy,
  Conference on Problems of macroeconomic theory, August 1999