1. Aaron, Henry. “The Foundations of the 'War on Poverty' Reexamined.” American Economic Review 57 (December, 1967): 1229–40.
2. Abowd, John M. and Richard B. Freeman. Immigration, Trade, and the Labor Market. Chicago: University of Chicago Press, 1991.
3. Adams, Thomas S. and Helen L. Sumner. Labor Problems. New York: Macmillan, 1905.
4. Amemiya, Takeshi. “Qualitative Response Models: A Survey.” Journal of Economic Literature 19 (Decem-ber 1981): 1483–536.
5. Atkins, Willard E. and Harold D. Laswell. Labor Altitudes and Problems. New York: Prentice-Hall, 1924.