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The preventive tariff and the dual in linear programming
Waverman, Leonard, (1972)
Trade facilitation and transport reform
Dick, Malise, (1992)
Applied welfare analysis of tariffs and foreign investment under imperfect competition
Sáez, Raúl E., (1990)
Monopsonistic Discrimination and Sex Differences Wages
Cardwell, Lucy A., (1975)
Transport Cost and Other Determinants of the Intensity of Cultivation in Rural Zaire
Transport cost and other determinants of the intensity of cultivation in rural Zaire