This paper presents an overlapping generations model of environmental externalities with a depollution technology. each agent concerned by the environmental degradation can volutary contribute in order to reduce it. Contributing to the environmental quality means financing depollution activities...

A canonical model of Bayesian learning is presented in which the interaction of the observation of discrete activities and the possibility of delaying actions generate informational externalities with generic properties: (i) strategic complementarities or substituabilities arise, depending on...

This paper presents a political economy approach to payroll tax competition between countries adopting different systems of social insurance.