This paper examines the effects of specialisation (within-sector clustering) and diversity (between-sector clustering) on business services profitability and location choice. We apply a semiparametric Poisson sorting model allowing for firm-specific effects. We find that for most firms,...

This paper studies the interaction of agents' collateral price beliefs, credit constraint and aggregate economic activity over the business cycle. Learning strengthens the role of collateral constraints in aggregate fluctuations. Under Heterogeneous learning rules, numerical simulations...

This comment shows that the "optimality" conditions in Assenza and Berardi (2009, JEDC) "Learning in a Credit Economy" imply that agents' "optimal" choices are either suboptimal or infeasible. It presents the correct optimality conditions and discusses the effect on the E-stability condition of...

We propose a general framework for studying the evolution of heterogeneous beliefs in a dynamic feedback setting. Beliefs distributions are defined on a continuous space representing the possible strategies agents can choose from. Agents base their choices on past performances. As new...

This paper studies network formation in settings where players are heterogeneous with respect to benefits as well as the costs of forming links. Our results demonstrate that centrality, center-sponsorship and short network diameter are robust features of equilibrium networks. We find that in a...

We combine micro and macro unemployment duration data to study the effects of the business cycle on the outflow from unemployment. We allow the cycle to affect individual exit probabilities of unemployed workers as well as the composition of the total inflow into unemployment. We estimate the...