1. Catching up, forging ahead, and falling behind;Abramovitz;Journal of Economic History,1986
2. Resource and output trends in the United States since 1870;Abramovitz;American Economic Review (Papers and Proceedings),1956
3. Economic backwardness in political perspective;Acemoglu;American Political Science Review,2006
4. A model of growth through creative destruction;Aghion;Econometrica,1992
5. International data on education: an overview;Barro;Oxford Bulletin of Economics and Statistics,2000