We study the effects of school starting age on siblings' infant health. In Spain, children born in December start … school a year earlier than those born the following January, despite being essentially the same age. We follow a regression … discontinuity design to compare the health at birth of the children of women born in January versus the previous December, using …

We use a credible regression discontinuity design to estimate causal education effects. Pupils in the Swiss education … system had to pass a centrally organized exam that classified them into different levels of secondary school, and that …