This paper presents a partial equilibrium model for the analysis of some aspects of international trade and trade policy for a less developed country which exports intermediate goods in an imperfectly competitive market structure and within which some competing firms are multinational enterprises (MNEs). It then examines the effects on exports and the gains from trade for a LDC of exogenous shocks originating in the economies involved in trade; the effects of a higher degree of foreign ownership of the export activities of the LDC; and the effects of an increase in the degree of competitiveness among firms serving the market for the finished product which uses the intermediate goods exported by the LDC.