The results of PISA 2000, OECD's groundbreaking comparison of the educational outcomes of 15-year-olds, shook the belief of Danes that theirs was the best education system in the world. In this report, a team of examiners determines why Denmark did worse than expected and recommends a series of...

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...