In this paper a Harris-Todaro migration model is developed with the ur
ban manufacturing sector supplying a crucial input for the rural secto
r. Capital is region specific but flows freely between two urban secto
rs. Final goods are traded and have exogenously fixed prices. If this
economy imposes a tariff on the import-competing manufacturing sector,
employment might go down even if the protected sector is labour inten
sive. The paper describes how intersectoral linkages can play a signif
icant role in determining the employment effects of a tariff.