He is director of the quarterly journal of economic and political theory Theseis (published since 1982 in the Greek language) and a member of the Board of Scientific Advisors (Wissenschaftlicher Beirat) of the annual journal Beitr[ddot{a}]ge zur Marx-Engels-Forschung: Neue Folge (Berlin, Germany). He is author of a large number of papers and of several books, of which the most recently published are: Marxism as a Conflict between Schools of Thought (Athens 1996), Theories of Global Capitalism: A Critical Approach (Athens 1997), Modes of Production and Marxist Analysis (Athens 1997), all in the Greek language. He is the editor of a collective volume in the English language entitled Rethinking Democracy and the Welfare State, Ellinika Grammata, Athens 1999.