Chiswick, Carmel Ullman On estimating earnings functions for LDCS / [by] Carmel Ullman C hiswick. - washington, D.C.: IBRD, 1976. - 68-78p. ; 24 cm. - World Bank reprint series; no. 44. . Reprinted from the Journal of Development Economics 3, 1976. Subjects--Topical Terms: Developing countries-Estimates.