We show that, in a two-period economy with uncertainty in the second period, if an allocation is Pareto optimal for a given set of beliefs and remains optimal when these beliefs are changed, then the set of optimal allocations of the two economies must actually coincide. We identify equivalence...

In this paper, we extend the problem of decentralization of Pareto optima in an economy with production externalities to the case where the production capacities upon which Pareto optimality is defined may differ from the aggregate of the firms expectations about their production possibilities....

This paper studies the welfare improvement properties of a market of allowances in an economy with a single type of externality. We show that thanks to the opening of such a market the Pareto optima can be decentralized as marginal pricing equilibria. However, the set of equilibria is much...

Un modèle de commerce international en équilibre général est présenté, avec deux zones, deux biens et deux facteurs de production, où, du fait de rigidités salariales, le libre échange génère du chomage et par conséquent une situation moins bonne que l'autarcie du point de vue d'une...

At the end of working life, as well as reducing unemployment benefits, the unemployment-insurance agency could apply pension tax instead of wage tax. First, the pension tax provides greater incentives as the value of re-employment is tax-free. Second, the short job duration before retirement...

Degressivity of unemployment benefits is a major feature of social protection in most industrialised countries: the replacement rate (the ratio between the level of welfare benefits and the previous income) typically declines with the length of the unemployment spell. Moreover degressivity of...

This paper analyses the potential impacts of introducing unemployment insurance (UI) in middle income countries using the case of Malaysia, which today does not have such a system. The analysis is based on a job search model with unemployment and three employment sectors: formal and informal...