This work aims at evaluating how is the situation of the twin cities Ponta Pora-Pedro Juan Caballero and Foz do Iguaçu-Ciudad del Este in the face of the South-America regional disarticulations. In order to deal with this issue I prioritized the political and economic spatial dynamics, paying attention to the transport networks and productive structures. I assume the hypothesis that insufficient investment in rail and hidroviary modal inhibits the possibilities of these twin cities to interact with other South American cities. In the first chapter I present the conceptual references that guide this thesis, featuring Rogério Haesbaert, Friedrich List, Gunnar Myrdal and Albert Hirschman, as well as the reflections on the relationship between space, power and transport, from contributions of political geography and transport geography, complemented by the debate on the evolution of the concept of boundaries as peripheral areas to central areas in regional integration processes. The second chapter offers a historical contextualization of the space-occupying process of the areas discussed here. The third chapter is dedicated to analysis of the formation of transport networks and productive activities in Ponta Porã-Pedro Juan Caballero, while the fourth chapter does the same in relation to Foz do Iguaçu-Ciudad del Este. The two following chapters discuss hidroviary and rail transport at investments. Thereafter I point out the existence of two antagonistic projects: the primary-export model and the development model based on knowledge and technology intensive activities. The last chapter concludes the work.

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OLIVEIRA, M. G. de. 2012. As cidades-gêmeas Ponta Porã-Pedro Juan Caballero e Foz do Iguaçu-Ciudad del Este diante da des-articulação regional sul-americana. Tese (Doutorado em Geografia) – Programa de Pós-graduação em Geografia, Universidade Federal do Rio de Janeiro, Rio de Janeiro.