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Abstract:
In this paper, we study the effect of skill-biased technological change on unemployment when benefits are linked to the evolution of average income and when this is not the case. In the former case, an increase in the productivity of skilled workers and hence their wage leads to an increase in average income and hence in benefits. The increased fallback income, in turn, makes unskilled workers ask for higher wages. As higher wages are not justified by respective productivity increases, unemployment rises. More generally, we show that skill-biased technological change leads to increasing unemployment of the unskilled when benefits are endogenous. The model provides a theoretical explanation for diverging developments in wage inequality and unemployment under different social benefits regimes: Analyzing the social legislation in 14 countries, we find that benefits are linked to the evolution of average income in Continental Europe but not in the U.S. and the UK. Given this institutional difference, our model predicts that skill-biased technological change leads to rising unemployment in Continental Europe and rising wage inequality in the U.S. and the UK.

Unemployment, Skill-Biased Technological Change, Benefits

Abstract:
This paper studies the relation between workers' age and their productivity in work teams. We explore a unique data set that combines data on errors occurring in the production process of a large car manufacturer with detailed information on the personal characteristics of workers responsible for the errors. We do not find evidence that productivity declines with age.

Age-Productivity Profiles

Abstract:
In this paper, I analyse the relation between workers' sick leave and the composition of their work teams with respect to age, job tenure, education, and nationality. The probability of sick leave of workers in work teams is shown to be lower if their teammates are older, have shorter job tenure, are less educated, female and of same nationality. In particular, the difference between a worker's age and the average age of her teammates explains a large part of the well-known positive correlation between age and sick days. In fact, for workers older than 44 years, individual age does not have any significant effect on sick days if the difference between individual age and average team age is held constant. This age difference can be controlled by the management. If older workers have more sick days only if they work in teams with younger workers, it might optimal to form age-homogeneous work teams.

Absenteeism, Teamwork, Age-Diverse Work Teams

Abstract:
In Acemoglu's model of directed technical change, the skill-premium increases in consequence of an increase in the relative supply of skilled labor. In this paper, I argue that other measures of wage inequality such as the Gini-coefficient do not necessarily rise as well. The Gini-coefficient depends positively on the skill-premium but the effect of an increase in the relative supply of skilled labor is ambiguous. A simulation of Acemoglu's model shows that the growth in the relative supply of skilled labor has led to increased wage inequality in the past but will lead to decreasing wage inequality in the future.

Directed Technical Change, Wage Inequality

Abstract:
This paper studies the employment effects of technological change when benefits are endogenous. If the (i) level of welfare aid depends on the general income level in the economy and (ii) wages for unskilled workers cannot fall below the level of welfare aid, there is a link between the wage for unskilled labor and the productivity of skilled labor. An increase in the latter will lead to an increase in average income and hence the level of welfare aid. This in turn leads unions to ask for higher wages for unskilled workers. Technological change is shown to have employment effects (only) if it is skill-biased and if this link exists.

Unemployment, Skill-Biased Technical Change, Union Wage Setting

Abstract:
This paper introduces a new argument into the theoretical literature on labor market effects of changes in working hours and labor force participation. We advance a general equilibrium model in which increased labor supply reduces unskilled unemployment via consumer demand: longer work hours and higher labor force participation imply higher incomes and less (leisure) time. In consequence, home production is reduced in favor of outsourcing domestic tasks to the market, shifting consumer demand toward unskill-intensive goods. Relative demand for unskilled labor rises and unemployment falls. Finally, we provide empirical support for the basic mechanisms of our model for Germany.

Working Time Reduction, Labor Force Participation, Low Skill Unemployment, Home Production, Time Use

Abstract:
This paper presents a model in which perpetual skill-biased technological change does not lead to ever increasing wage inequality. The model is consistent with the increase in wage inequality in the 1980s and the subsequent stabilization in the 1990s.

Skill-Biased Techhnological Change, Wage Inequality, Factor Substitution