International differences in fuel taxation are huge, and may be justified by different local negative externalities that taxes must correct, as well as by different preferences for public spending. In this context, should a worldwide unique carbon tax be added to these local taxes to correct the...

This paper studies the maximin paths of the canonical Dasgupta-Heal-Solow model when the stock of natural capital is a direct argument of well-being, besides consumption. Hartwick's rule then appears as an efficient tool to characterize solutions in a variety of settings. We start with the case...

This paper studies the undiscounted utilitarian optimal paths of the canonical Dasgupta-Heal-Solow model when the stock of natural capital is a direct argument of well-being, besides consumption. We use a Keynes-Ramsey rule wich yields a generalization of Hartwick's rule : if society has a zero...

Following Stollery [1998], we extend the Solow, Dasgupta-Heal model to analyze the effects of global warning. The rise of temperature is caused by the use of fossil resources so that the temperature level can be linked to the remaining stock of these resources. The rise of temperature affects...

In this paper, the two-period OLG model has been modified to distinguish the effects of individual ageing from changes in the birth rate. Optimal pension and retirement age policies have been characterized in a dynamic framework. We have considered a mixed pension scheme that is fully funded,...

We offer a new method to characterized cointegration properties of higher orders. This method relies on a very simple device. We first examine the question in a deterministic framework, where cointegration porperties pertains to rate of growth. We relate these properties to the structure of the...

Despite numerous efforts at interpretation and exposition, the standard Real Business Cycle model remains somewhat misterious. Its dynamic porperties are by now familiar, at least to those who made the effort to run simulation by themselves. Many extention of the basic model have been developed,...

Le modèle WS-PS (wage-setting, price-setting), introduit par Layard-Nickell-Jackman(1991) et approfondi récemment par Cahuc-Zylberberg(1999), constitue une référence pour fonder un taux de chômage d'équilibre. Nous en donnons ici une présentation systématique. Nous mettons l'accent sur...

Cette étude a deux objectifs. Le premier est de présenter une synthèse de l'analyse des retraites dans le cadre du modèle à générations. Nous négligeons toute hétérogénéité individuelle et nous mettons donc l'accent sur les arbitrages intertemporels. Le modèle de Diamond met en...

We study the optimal extraction of two non-renewable resources when extraction costs depend on cumulative previous extraction. We first define a complete user cost of natural resources, including environmental damages, which allows us to greatly simplify the resolution. This framework is applied...