Mixed-aged classes (MA-classes) are a common phenomenon around the world. In Sweden, these types of classes increased rapidly during the 1980:s and 1990:s. But the scientific evidence of the benefits of MA-classes is not convincing. In this paper, we estimate the effect of attending an MA-class...

This paper investigates the effect of parental leave - both own and spousal - on subsequent earnings using different sources of variation. Using fixed-effect models, and in line with previous results, parental leave is found to decrease each parent's future earnings. Also spousal leave is...