This paper proposes a welfare criterion that balances the need for development and the concern for the least advantaged generations, and explores its implications. This criterion, called the mixed Bentham-Rawls criterion, moderates the effect of discounting, yet permits some degree of...

Despite its theoretical dominance, the empirical case in favor of the permanent income hypothesis is weak. Contrary to one of its basic implications, a growing body of evidence suggests that rich households save a higher proportion of their permanent income than poor households. We propose an...

This paper discusses the influence of public ownership on trade policy instruments. We demonstrate three important invariance results. First, the degree of public ownership affects neither the level of socially optimal activities nor welfare if the government chooses optimal trade policy...

This paper develops an oligopolistic model of international trade with heterogeneous firms and endogenous R&D to examine how trade liberalization affects firm and industry productivity, as well as social welfare. We identify four effects of trade liberalization on productivity: (i) a direct...