A “Rosetta Stone” for Comparing Test Scores Around the World (and Across the Global Income Distribution)
How much do educational outcomes around the world depend on where you were born? In a new CGD working paper, we propose a very simple strategy to overcome this problem and build a “Rosetta Stone” for test scores. We take a single sample of students and give them questions from each major exam around the world. By grading each child’s responses on the original test scales, we calculate scores on different exams for the same child on the same day.