Prepared for a Symposium of Post-Keynesian Theory, Livingston College/Rutgers University, New Brunswick, NJ.
Also included here are:
A revision of this paper;
Corrected proofs from Banca Nazionale del Lavoro Quarterly Review of that revision;
A letter to the Editor of the Quarterly Review, Allesandro Roncaglia;
The published article;
The published article in Italian
