International school test scores and economic growth

We expand Hanushek and Kimko's (2000) analysis of the relationship between schooling quality, as measured by scores in international tests, and growth. We take account of another fifteen years of growth and approximately twice as many test score results. We treat the data first as a panel, relating growth only to test scores at earlier dates, and then as a cross-section. In both cases we find the effect of schooling quality on growth to be statistically significant but substantially smaller than that reported by Hanushek and Kimko (2000) and Hanushek and Woessmann (2007).