Using the 2003 National Survey of College Graduates, I examine how immigrants perform relative to natives in activities likely to increase U.S. productivity, according to the type of visa on which they first entered the United States. Immigrants who first entered on a student/trainee visa or a...

Using longitudinal matched employer-employee data for the period 1999-2006, we investigate the relationship between age, wage and productivity in the Belgian private sector. More precisely, we examine how changes in the proportions of young (16-29 years), middle-aged (30-49 years) and older...

Labour economists typically assume that pay differences between occupations can be explained with variations in productivity. The empirical evidence on the validity of this assumption is surprisingly thin and subject to various potential biases. The authors use matched employer-employee panel...

Under communism, workers had their wages set according to a centrally-determined wage grid. In this paper we use new micro data on men to estimate returns to human capital under the communist wage grid and during the transition to a market economy. We use data from the Czech Republic because it...

The paper examines the optimal level of training investment when trained workers are mobile, wage contracts are time-consistent, and training comprises both specific and general skills. It is shown that, in the absence of a social planner, the firm has ex-post monopsonistic power that drives...

Using micro data on women in the Czech Republic, we compare returns to various measures of human capital at the end of communism (1989), in mid-transition (1996) and in late/post-transition (2002). We show: dramatic increases in returns to education from 1989 to 1996 but no change from 1996 to 2002;...

This paper explores the implications of the ongoing reorganization of firms for inequality in the labour market. We show how recent technological advances in physical and human capital can lead to the breakdown of occupational barriers, creating demands for new combinations of skills, and...

In this paper we examine the effects of the abolition of the compulsory conscription in France on the demand for education and labour market outcomes. The reform took place in 1997 and affected all men born after 1979. Before the reform, staying on in education was a way to defer the national...

In this Paper, we analyse the extent to which market forces create an incentive for cloning human beings. We show that a market for cloning arises if a large enough fraction of the clone's income can be appropriated by its model. Only people with the highest ability are cloned, while people at...