The probability of being depressed increases dramatically during adolescence and is linked to a range of adverse outcomes. Many studies show a correlation between religiosity and mental health, yet the question remains whether the link is causal. The key issue is selection into religiosity. We...

We examine the effects of a comprehensive school reform on mental health. The reform postponed the tracking of students into vocational and academic schools from age 11 to age 16. The reform was implemented gradually across Finnish municipalities between 1972 and 1977. We use...