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The Value of Smarter Teachers: International Evidence on Teacher Cognitive Skills and Student Performance

Eric A. Hanushek, Marc Piopiunik, Simon Wiederhold
Published Date: 
December 2014 (revised April 2017)
NBER Working Paper No. 20727
National Bureau of Economic Research

International differences in teacher quality are commonly hypothesized to be a key determinant of the large international student performance gaps, but lack of consistent quality measures has precluded testing this. Using unique assessment data, we construct country-level measures of teacher cognitive skills. We find substantial differences in teacher cognitive skills across countries, and these are strongly related to student performance. Results are supported by fixed-effects estimation exploiting within-country between-subject variation in teacher skills. Observed country variations in teacher cognitive skills are significantly related to differences in women’s access to high-skilled occupations outside teaching and to salary premiums for teachers.