
| Directed graph theory and the economic analisys of innovation |
| Enviromental taxes, relative prices and choice of thecnique in a linear model of production |
| Interest rates in post-Keneisian models of growt and distribution |
| A non-tradable wage good in a ricardian model |
| Ricardo's theorems on relative prices a note on prof. Morishima |
| Taking effort seriously: a reply to Currie and Steedman |
| Really taking effort seriously |