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Across six Sub-Saharan African countries, grade 4 students of teachers who were hired after a free primary education reform perform worse, on average, on language and math tests--statistically significantly so in language--than students of teachers who were hired before the reform. Teachers who were hired just after the reform also perform worse, on average, on tests of subject content knowledge than those hired before the reform. The results are sensitive to the time frames considered in the analysis, and aggregate results mask substantial variation across countries--gaps are large and significant in some countries but negligible in others. Analysis of teacher demographic and education characteristics--including education level or teacher certification--as well as teacher classroom-level behaviors reveals few systematic differences associated with being hired pre- or post-reform. [Additional support for the working paper from the Research in Improving Systems of Education (RISE) (United Kingdom) and the Knowledge for Change Program (KCP) Trust Fund.]

This paper assesses the reliability and validity of cognitive and socioemotional skills measures and investigates the correlation between schooling, skills acquisition, and labor earnings. The primary data from Pakistan incorporates two innovations related to measurement and sampling. On measurement, the paper develops and implements a battery of instruments intended to capture cognitive and socioemotional skills among young adults. On sampling, the paper uses a panel that follows respondents from their original rural locations in 2003 to their residences in 2018, a period over which 38 percent of the respondents left their native villages. In terms of their validity and reliability, our skills measures compare favorably to previous measurement attempts in low- and middle-income countries. The following are documented in the data: (a) more years of schooling are correlated with higher cognitive and socioemotional skills; (b) labor earnings are correlated with cognitive and socioemotional skills as well as years of schooling; and (c) the earnings-skills correlations depend on respondents' migration status. The magnitudes of the correlations between schooling and skills on the one hand and earnings and skills on the other are consistent with a widespread concern that such skills are under-produced in the schooling system. [This report was prepared by the World Bank Group's Development Research Group, Development Economics. Funding was provided by RISE and World Bank's Strategic Research Program Fund.]