This paper aims at providing a simple economic framework to address the question of the optimal share of investments in medical R&D in total public spending. In order to capture the long-run impact of tax-financed medical R&D on the growth rate, we develop an endogenous growth model in the...

In this paper, we study the existence of an intertemporal equilibrium in a Ramsey model with heterogenous discounting, elastic labor supply and borrowing constraints. Applying a fixed-point argument by Gale and Mas-Colell (1975), we prove the existence of an equilibrium in a truncated bounded...

In this paper, we consider an OG model with endogenous fertility and pollution externalities. We assume that pollution lowers the productivity. In the long run, under dominant income (substitution) effects, a raise in the cost of rearing children, increases (decreases) consumption and decreases...

The international asset pricing models are mostly developed in the case of parity failure (investors of different countries do not agree on the expected returns on securities). In this case, an equilibrium in the in- ternational asset markets may exist, but not in the international good markets....

We address the fundamental issues of existence and efficiency of an equilibrium in a Ramsey model with many agents, where agents have heterogenous discounting, elastic labor supply and face borrowing con- straints. The existence of rational bubbles is also tackled. In the first part, we prove...

We address the issues of existence of Ramsey equilibrium under bor- rowing constraints and occurrence of rational bubbles. First, we consider a time-truncated economy. Since the feasible allo- cations sets of our economy are uniformly bounded, we prove that there exists an equilibrium in a...

In this paper, we study the effects of collaterals on business cycles and growth in monetary economies with credit market imperfections. We consider an endogenous growth model with a partial cash-in-advance constraint and inelastic labor supply. We assume that the share of consumption purchases...

This paper aims at providing a simple economic framework to address a somewhat neglected question of economic policy, namely the optimal share of investments in medical R&D in total public spending. In or- der to capture the long-run impact of tax-financed medical R&D on the growth rate, we...

The purpose of the model developed in the paper is to provide a simple economic framework to address an economic policy question, namely the optimal size of military R&D investment within total public expenditures. To capture the long-run impact of military R&D on the growth rate of the economy,...

This paper examines the decision process that leads destination countries to introduce selective immigration policies based on skill requirements. We show that in absence of policy implementation costs, destination countries’ preferences are polarized between complete openness and complete...