This paper finds that returns to computer use do not vary with the intensity of computer use. This is evidence against the productivity interpretation of these returns and supports the view that returns to computer use can be attributed tounobserved heterogeneity.

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 for...

This paper finds that returns to computer use do not vary with the intensity of computer use. This is evidence against the productivity interpretation of these returns and supports the view that returns to computer use can be attributed to unobserved heterogeneity.

This paper evaluates the effects of two subsidies targeted at disadvantaged pupils in the Netherlands. The first scheme gives primary schools with at least 70 percent minority pupils extra funding for personnel. The second scheme gives primary schools with at least 70 percent pupils from...

Using a comprehensive administrative database we exploit independent quasiexperimental methods to estimate the effect of class size on student achievement in Norway. The first method is based on a maximum class size rule in the spirit Angrist and Lavy (1999). The second method exploits...

This discussion paper resulted in an article in the <I>Journal of Development Economics</I> (2013). Volume 103, pages 43-51.<P> To raise school attendance, many programs in developing countries eliminate orreduce private contributions to education. This paper documents an unintendednegative effect of such...</p></i>

In an influential study, Mas and Moretti (2009) find that “worker effort is positively related to the productivity of workers who see him, but not workers who do not see him”. They interpret this as evidence that social pressure can reduce free riding. In this paper we report an attempt to...

This discussion paper resulted in an article in <I>Economics of Education Review</I>. Volume 38, pages 51-63.<P> Recent studies for primary and secondary education find positive effects of the share of girls in the classroom on achievement of boys and girls. This study examines whether these results can...</p></i>

Using a discontinuity in the funding scheme, we evaluate the impact of home visitsand child care centers on poor children and mothers in Ecuador. We find thathome visits are beneficial for children's cognitive outcomes and health and for mothers'psychological well-being but reduce mothers' labor...

This paper explores the hypothesis that wage differentials between skill groups across countries are consistent with a demand and supply framework. Using micro data from 15 countries we find that about one third of the variation in relative wages between skill groups across countries is...