He is full professor at the University of Sannio (Italy) where in the late 2000s directed the economic department. Realfonzo was a member of the scientific committee of "Industria 2015" (2006–2007). After that he was two times the councilman for economic affairs of the city of Naples.
Realfonzo studied mainly at the University of Naples (with Augusto Graziani), at the University of Florence and at the University of Cambridge.
Among his publications are Money and Banking (Elgar 1998) and several papers in international journals and books; among other things he edited, with G. Fontana, The Monetary Theory of Production. Tradition and Perspectives (Macmillan, 2005). He is the editor of the magazine on line “Economia e Politica”.
In 2010 he was the promoter of the “Letter from the economists” against the austerity in Europe, a manifesto signed by more than 300 scholars. He is an editorialist of the main Italian economic newspaper Il Sole 24 Ore.
Realfonzo is particularly known for his contributions to the theory of monetary circuit, the post-Keynesian approach to the theory of money and income distribution particularly developed in Italy, France, Canada and USA.
- John King, A History of Post Keynesian Economics Since 1936, Edward Elgar, 2002.
- Teoria in cerca di exit strategy. Gli italiani e le scuole, Il Sole 24 Ore, July 14, 2010.
- Wikipedia, Italian edition.
- John King (ed.), The Elgar Companion to Post Keynesian Economics, Edward Elgar, 2003.