We estimate the effect of class size on student performance in 11 countries, combining school fixed effects and instrumental variables to identify random class-size variation between two adjacent grades within individual schools. Conventional estimates of class-size effects are shown to be...

Nineteenth-century Catholic doctrine strongly opposed state schooling. We show that countries with larger shares of Catholics in 1900 (but without a Catholic state religion) tend to have larger shares of privately operated schools even today. We use this historical pattern as a natural...

We examine whether the sorting of high- and low-achieving students into classes of different sizes results in a regressive or compensatory pattern of class sizes for 18 national school systems. Sorting effects are identified by subtracting the causal effect of class size on performance from...

Recent studies conclude that teachers are important for student learning but it remains uncertain what actually determines effective teaching. This study directly peers into the black box of educational production by investigating the relationship between lecture style teaching and student...

We shed new light on the relative importance that schools’ ability to produce high achievers in math has for economic growth. Drawing on data from the International Mathematical Olympiad (IMO), the world championship in mathematics for high school students, we construct a measure for a...

Lifelong learning is often promoted in aging societies, but little is known about its returns or governments’ ability to advance it. This paper evaluates the effects of a large-scale randomized field experiment issuing vouchers for adult education in Switzerland. We find no significant average...

Many countries use centralized exit exams as a governance devise of the school system. While abundant evidence suggests positive effects of central exams on achievement tests, previous research on university-bound students shows no effects on subsequent earnings. We suggest that labor-market...

Lifelong learning becomes increasingly important in times of population ageing, but little is known about the returns to adult education or the effectiveness of government attempts to promote adult learning. This paper evaluates the effects of a large-scale randomized field experiment with...

Education policy-makers and practitioners want to know which policies and practices can best achieve their goals. But research that can inform evidence-based policy often requires complex methods to distinguish causation from accidental association. Avoiding econometric jargon and technical...