1. How Large are Human Capital Externalities? Evidence from Compulsory Schooling Laws.,2000
2. International Comparisons of Educational Attainment.;Journal of Monetary Economics,1993
3. International Measures of Schooling Years and Schooling Quality.;American Economic Review,1996
4. International Data on Educational Attainment, Updates and Implications.,2000
5. Caveat Emptor: Cross-country Data on Education and the Labor Force.;Journal of Development Economics,1994