Several countries practice a system where laymen, who lack legal education, participate in the judicial decision making. Yet, little is known about their potential influence on the court rulings. In Sweden lay judges (namndeman) are affiliated with the political parties and appointed in...

In Sweden, children typically start compulsary school the year they turn seven. Individuals born just before or just after the new year, have about the same date of birth but start school att different ages. We exploit this source of exogenous variation, to identify the effects of age at school...

In most countries the number of places at the universities is restricted. This paper estimates the effect of university enrollment constraints in 1982 on years of education and earnings in Sweden 1981-96. The effect on educational attainment is related to labor market performance, to estimate...

In many countries welfare services that traditionally have been provided by the public sector are being contracted out to private providers. But are private contractors better at providing these services? We use a randomized experiment to empirically assess the effectiveness of contracting out...

In many countries welfare services that traditionally have been provided by the public sector are being contracted out to private providers. But are private contractors better at providing these services? We use a randomized experiment to empirically assess the effectiveness of contracting out...

This article evaluates the long-term effects of class size in primary school. We use rich data from Sweden and exploit variation in class size created by a maximum class size rule. Smaller classes in the last three years of primary school (age 10 to 13) are beneficial for cognitive and...

In many countries welfare services that traditionally have been provided by the public sector are being contracted out to private providers. But are private contractors better at providing these services? We use a randomized experiment to empirically assess the effectiveness of contracting out...

Studies on the effect of class size on student achievement typically find that disadvantaged students benefit more from reduced class size than others. To better understand this differential impact, we analyze changes in the learning environment due to class size, and behavioral responses to...

Using a Difference-in-Differences approach, we evaluate the effects of a 10 percentage point reduction in the payroll tax introduced in 2002 in northern Sweden. We find no employment effects among firms existing both before and after the reform, whereas the average wage bill per employee...