URL des Cahiers : https://hal-paris1.archives-ouvertes.fr/CAHIERS-MSEVoir aussi l'article basé sur ce document de travail paru dans "Research in Economics", 59, 2, 2005, pp. 189-208Cahiers de la MSE 2005.26 - Série Verte - ISSN : 1624-0340We analyze the relationship between imperfect competition and capital accumulation in a dual economy, with traditional and modern sectors and two types of agents (workers and capitalists). Workers allocate their time endowment between the two sectors. Capitalists accumulate wealth in the modern sector. The economy is open to capital flows, but capitalists face borrowing constraints. Non-competitive behavior of capitalists results in a rent which is extracted from the workers and lowers employment in the mo...