1. Some tests of specification for panel data: Monte Carlo evidence and an application to employment equations;Arellano;Review of Economic Studies,1991
2. Another look at the instrumental variable estimation of error-components models;Arellano;Journal of Econometrics,1995
3. Azariadis, C. & Stachurski, J. (2005). Poverty traps. In Ph. Aghion, S. Durlauf (Eds.), Handbook of economic growth (Vol. 1, 1st ed.). Amsterdam: Elsevier, North-Holland.
4. International data on educational attainment: Updates and implications;Barro;Oxford Economic Papers,2001
5. Batista, C., Lacuesta, A., & Vicente, P. C. (2008). Testing the brain gain hypothesis: micro evidence from cape verde. IIIS working paper no. 282.