Private schooling leads to better academic outcomes for students around the world. Using data from 63 countries, I find that a 1 percentage point increase in the private share of schooling enrollment is associated with a 1.4-point increase in math scores and a 1.1-point increase in reading scores after controlling for factors such as gross domestic product, population, and government expenditures.
Read the full study here at School Effectiveness and School Improvement.