At the end of the seventies, the use of export subsidies got widespread, as a mean to protect national producers. But according to the classical analysis of trade policies, they aren't efficient policy tools to reduce the external contraint. Nevertheless, this analysis relies upon three...

Many studies on the future of social security systems in a unified Europe treat the issue as merely a particular aspect of the broader question of redistribution within a federation with mobile agents. As a result, such studies typically recommend their gradual centralisation. This paper which...

We consider an economy where successive generations consume two different kinds of services, produced respectively from artificial and natural assets. Technical progress makes it possible to expand the artificial assets, but not the natural ones; on the contrary, the latter may be eroded by a...