The paper presents a general equilibrium model of a pure exchange economy with stochastic endowment in which speculation is profitable and stabilizes prices, but is useless from a welfare point of view. Reconciling the Siegel paradox with the theory of incomplete markets we show that banning...

This paper reconsiders the determinants of the exchange rate by studying the historical episode after the fall of the Iron Curtain. Testing a modified portfolio balance model, we attribute the strength of the deutschmark in the early nineties and the puzzling decline of the euro during its...

It is shown that the net fiscal externality created by an additional member of a pay-as-you-go pension system that is endowed with individual accounts equals the gross contributions" of this member. In Germany, this is an amount of about DM 175,000. The paper uses this" information to design a...

The welfare state can be seen as an insurance device that makes lifetime careers safer, increases risk taking and suffers from moral hazard effects. Adopting this view, the paper studies the trade-off between average income and inequality, evaluating redistributive equilibria from an allocative...

Judged by the principle of intertemporal Pareto optimality, insecure property rights and the greenhouse effect both imply overly rapid extraction of fossil carbon resources. A gradual expansion of demand-reducing public policies -- such as increasing ad-valorem taxes on carbon consumption or...

This note generalizes the Solow-Stiglitz efficiency condition for natural resources to the problem of fossil fuel extraction with a greenhouse effect. The generalized optimality condition suggests that the greenhouse effect implies overextraction in the sense of leaving future generations a...

The emergence of the Asian tiger countries and the participation of the ex-communist countries in world trade has reduced the equilibrium price of labor in western Europe and elsewhere. However, the actual price of labor hardly reacts, because the welfare state's minimum replacement incomes are...

While the old systems competition took place with closed borders, globalisation has brought about a new type of systems competition that is driven by the mobility of factors of production. The new systems competition will likely imply the erosion of the European welfare state, induce a race to...