How did EU membership of Eastern Europe affect student achievement?

The accession of Eastern European countries to the European Union increased family wealth and the returns to schooling. I analyze the change in student achievement due to the EU accession of Eastern Europe building on a panel of six PISA waves covering more than 1 million students in 32 countries. Using a difference-in-differences approach, I find a positive and statistically significant link of EU membership to reading scores by one tenth of a standard deviation. The effect seems robust to including controls from the human capital production function.