This Paper explores the implications of the recent sharp rise in US wage inequality for welfare and the cross-sectional distributions of hours worked, consumption and earnings. From 1967 to 1996 cross-sectional dispersion of earnings increased more than wage dispersion, due to a rise in the...

In many countries pension systems involve some form of earnings test; i.e., an individual’s benefits are reduced if he has labour income. This paper examines whether or not such earning tests emerge when pension system and income tax are optimally designed. We use a simple model with...

This paper shows that the combination of habit formation - present consumption creating additional consumption needs in the future - and myopia may explain why some retirees are forced to 'unretire', i.e., unexpectedly return to work. It also shows that when myopia about habit formation leads to...

This Paper studies the design of education policies in a setting of successive generations with heterogeneous individuals (high and low earning ability). Parents’ investment in education is motivated by warm-glow altruism and determines the probability that a child has high ability. Education...

We consider a two-period model. In the first period, individuals consume two goods: one is sinful and the other is not. The sin good brings pleasure but has a detrimental effect on second period health and individuals tend to underestimate this effect. In the second period, individuals can...

Some existing welfare programs (“work-first”) require participants to work in exchange for benefits. Others (“job search-first”) emphasize private job-search and provide assistance in finding and retaining a durable employment. This paper studies the optimal design of welfare programs...

Social insurance for the elderly is judged responsible for the widely observed trend towards early retirement. In a world of laissez-faire or in a first-best setting, there would be no such trend. However, when first-best instruments are not available, because health and productivity are not...

A Welfare-to-Work (WTW) program is a mix of government expenditures on various labor market policies targeted to the unemployed (e.g., unemployment insurance, job search monitoring, social assistance, wage subsidies). This paper provides a dynamic principal-agent framework suitable for analyzing...