Peter Fredriksson is Professor at the Department of Economics, Stockholm University. He is also a research fellow of IZA and CESifo. Peter got his PhD from Uppsala University in 1997. He has been the Director-General of the Institute for Labour Market Policy Evaluation (IFAU) and a Professor at the Department of Economics, Uppsala University. His main area of research is labor economics and he has, inter alia, worked on issues concerning immigration, education, labor mobility, and the design of unemployment insurance. He has published in journals like Quarterly Journal of Economics, Economic Journal, Journal of Business & Economics Statistics, Journal of Labor Economics, Journal of Public Economics, Journal of Human Resources, and Oxford Economic Papers.

He joined IZA as a Research Fellow in December 2003.



IZA Discussion Paper No. 10914

We examine the changes in the relative rewards to cognitive and non-cognitive skill during the time period 1992–2013. Using unique administrative data for Sweden, we document a secular increase in the returns to non-cognitive skill, which is particularly pronounced in the private sector and at the upper-end of the wage...

IZA Discussion Paper No. 9585

We examine the direct impact of idiosyncratic match quality on entry wages and job mobility using unique data on worker talents matched to job-indicators and individual wages. Tenured workers are clustered in jobs with high job-specific returns to their types of talents. We therefore measure mismatch by how well the...

IZA Discussion Paper No. 8019
published as 'Parental Responses to Public Investments in Children: Evidence from a Maximum Class Size Rule' in: Journal of Human Resources, 2016, 51(4), 832-868.

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 class size among parents, schools, teachers...

IZA Discussion Paper No. 5879
published in: Quarterly Journal of Economics, 2013, 128 (1), 249-285

This paper evaluates the long-term effects of class size in primary school. We use rich administrative 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 not only beneficial...

IZA Discussion Paper No. 4521
published in: American Economic Journal: Applied Economics, 2011, 3 (2), 67-95

Immigrants typically perform worse than other students in the OECD countries. We examine to what extent this is due to the population characteristics of the neighborhoods that immigrants grow up in. We address this issue using a governmental refugee placement policy which provides exogenous variation in the initial place of...

IZA Discussion Paper No. 3570
Peter Fredriksson, Martin Söderström

We examine the relationship between unemployment benefits and unemployment using Swedish regional data. To estimate the effect of an increase in unemployment insurance (UI) on unemployment we exploit the ceiling on UI benefits. The benefit ceiling, coupled with the fact that there are regional wage differentials, implies that the generosity...

IZA Discussion Paper No. 1659
published as: 'Life-cycle Effects of Age at School Start' in: Economic Journal, 2014, 124, 977-1004

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

IZA Discussion Paper No. 1536
published as: 'Peer Effects in Welfare Dependence: Quasi-experimental Evidence" in: Journal of Human Resources, 2009, 44(3), 799–825

We examine peer effects in welfare use among immigrants to Sweden by exploiting a governmental refugee placement policy. We distinguish between the quantity of contacts – the number of individuals of the same ethnicity – and the quality of contacts – welfare use among members of the ethnic group. OLS...

IZA Discussion Paper No. 1062
published in: Journal of Business and Economics Statistics, 2008, 26 (4), 435–445

This paper discusses the evaluation problem using observational data when the timing of treatment is an outcome of a stochastic process. We show that the duration framework in discrete time provides a fertile ground for effect evaluations. We suggest easy-to-use nonparametric survival function matching estimators. These estimators can be used...

IZA Discussion Paper No. 401
published in: Economic Journal, 2007, 117 (518), 399-421

This paper analyzes the design of optimal unemployment insurance in a search equilibrium framework where search effort among the unemployed is not perfectly observable. We examine to what extent the optimal policy involves monitoring of search effort and benefit sanctions if observed search is deemed insufficient. We find that introducing...