We propose a spatial search-matching model where both job creation and job destruction are endogenous. Workers are ex ante identical but not ex post since their job can be hit by a technological shock, which decreases their productivity. They reside in a city and commuting to the job center...

We develop a model where information about jobs is essentially obtained through friends and relatives, i.e. strong and weak ties. Workers commute to a business center to work and to interact with other people. We find that housing prices increase with the level of social interactions in the city...

We survey the literature on social networks by putting together the economics, sociological and physics/applied mathematics approaches, showing their similarities and differences. We expose, in particular, the two main ways of modeling network formation. While the physics/applied mathematics...

We survey the literature on the economic consequences of the structure of social networks. We develop a taxonomy of "macro" and "micro" characteristics of social interaction networks and discuss both the theoretical and empirical findings concerning the role of those characteristics in...

We examine the conceptualization of entrepreneurs in neo-Schumpeterian growth theory, which has reintroduced entrepreneurs into mainstream economics. Specifically, we analyze how neo-Schumpeterians relate to the contradiction between the entrepreneur-centered view of Schumpeter (1934) and the...

Within the field of innovation studies, researchers have identified several market failures that hamper investment in R&D, innovation and growth in a market economy. Several policies such as government subsidies, tax deductions, soft loans, and public venture capital provided to firms that...