Many countries around the world have large public pension programs. Traditionally, these programshave been used to induce retirement by the elderly in order to free up jobs for the young andto redistribute income across generations. This paper provides an efficiency rationale for the...

In recent years, many countries have experienced a significant shift in demographic patterns towards the elderly. This phenomenon poses numerous challenges for the design of public pension programs and labor market policies. To better understand how public policy should be designed in response...

A popular view about social security, dating back to its early days of inception, is that it is a means for young, unemployed workers to "purchase" jobs from older, employed workers. The question we ask is: Can social security, by encouraging retirement and hence creating job vacancies for the...

Many countries around the world have large public pension programs with signif-icant cross-cohort redistribution. This paper provides a rationale for such programsin a lifecycle framework with search and matching frictions in the labor market. Inthe model, public pension programs alter the age...

T.W. Schultz (1975) proposed that returns to human capital were highest in economicenvironments where technology, price or production shocks were common and managerial skillsto adapt resource allocations to those shocks were most in need. We hypothesize that variationin returns to human capital...

Sometimes authorities are unable to identify rapidly the origin of a tainted product.In such cases, recalls or warnings often apply to all suppliers, even to those thathad not contributed to the contamination. Traceability enables more targetedrecalls by identifying more specically the product's...