At the end a very old work in progress has become a WP. And unfortunately, it is not finished yet!
The Survival of Tuscan Firms (co-authored with Filippo Randelli)
In this paper we analyze the survival probability of firms in Tuscany (Italy) in the first decade of the 21st century. Using the Official Register of Firms, held by Unioncamere Toscany, we build a panel for the period 1998-2010. Taking into account both individual and context variables, we find that a higher institutional complexity and a lower population density have a positive and significant effect on probability to survive. Moreover, both MAR and Jacob externalities have a nonlinear effect on the probability to survive: it must be reached a minimum level so that the negative effects of competition are more than offset by the positive effects of networking.
You can downloaded it here!