Nelle'enunciato ci si interroga sul fenomeno della crescita, appare subito che essa ha assunto per lunghi periodi le caratteristiche di un movimento estensivo.

Economic development is, in essence, structural change. The latter if it is to be of a progressive kind requires, in turn, progress in modes of production.

This paper attempts to discuss the role of constraints in network formation and in the exploration process of complex spaces of fitness possiblities. It is held that similarities appear in both social and biological systems. The paper further argues that constraints are instrumental in setting a...