In this paper we adapt a discrete time version of the Lucas model to a model with social protection where part of the total production is devoted to the health expenditures. The output is produced by labor and the technology exhibits externalities. The rate of growth of human capital depends on...

In this paper, we consider an incumbent firm facing potential entry in a vertical differentiation model a la Mussa and Rosen where consumers differ only by their intensity of preference for quality. We ask whether the incumbent firm has the incentive to adopt a multi-product strategy in order to...