B. Milanovic. Bulletin of Economic Research. vol. 46, no. 1. pp. 81-90. 1994.
L. McCall. Theory and Society. vol. 21, no. 6. pp. 837-867. 1992.
B. Milanovic. Soviet Studies. vol. 44, no. 3. pp. 511-532. 1992.
P. Krugman. Journal of Political Economy. vol. 99, no. 3. pp. 483-499. 1991.
P. Krugman. The American Economic Review. vol. 70, no. 5. pp. 950-959. 1980.
P. Krugman. Journal of Money, Credit, and Banking. vol. 11, no. 3. pp. 311-325. 1979.