keine Angaben zu Lebensdaten, Rutgers Univ.; New Brunswick; NJ (1987); Visiting ass. prof.; Baruch College; City Univ. of New York (1989); Queens College; (1992)
keine Angaben zu Lebensdaten, The World Bank; Washington D.C. (2000); Social Science Research Council; New York (1992); Polish Academy of Sciences; Warsaw (1988)