Fujimoto, Takao; Silva, José A.; Villar, Antonio - In: Metroeconomica 56 (2005) 1, pp. 25-36
An input-output model with non-constant returns to scale and externalities is presented, and it is shown that in this model the non-substitution theorem is still valid. More precisely, the quantity side of the theorem, i.e. the proposition on efficiency, remains valid, while there can be no...