1. Abdollahi, M. (1979). Capitalism and brain drain: A dialectal analysis of the migration of highly qualified manpower from less developed to more developed capitalist countries, Iran and the U.S. PhD thesis, Western Michigan University, 797 pages.
2. Arrow, K.J. (1969). Classificatory notes on the production and transmission of technological knowledge. American Economic Review, 59(2), 29-35.
3. Barrett, A., & O’Connell, P. (2000). Is there a premium for returning Irish migrants? Discussion Paper, 135, IZA Institute for the Study of Labor.
4. Barro, R., & Sala-i-Martin, X.;1; (1995). Economic growth. New York: McGraw-Hill.
5. Basok, T. (2003). Mexican seasonal migration to Canada and development: A community-based comparison. International Migration, 41(2), 3-26.