1. Adams, R. (2003). International migration, remittances, and the brain drain: A study of 24 labor-exporting countries. World Bank Policy Research Working Paper No. 3069.
2. Event history analysis;Allison,1984
3. The impact of community-level variables on individual-level outcomes: Theoretical results and applications;Angeles;Sociological Methods and Research,2005
4. Associated Press, (2007). Ecuador examining how to reduce number of emigrants to Spain, foreign minister says. The International Herald Tribune, January 29.
5. The neighborhood history calendar: A data collection method designed for dynamic multilevel modeling;Axinn;Sociological Methodology,1997