Title: A geografia da defesa da concorrência no Mercosul. A importância da definição do mercado relevante na análise antitruste em um bloco econômico regional
Abstract: The initial mark of the proposed study here is "Protocolo de Defesa da Concorrência no Mercosul -Protocolo de Fortaleza" ("Competitor's Defense Protocol in Mercosul-Protocol of Fortaleza), as of Dec 17th, 1996, that despite being ratified by some States in Mercosul, and being validated in Brazil through Decret number 3.602 as of Sep 18th, 2000, very small advance has been identified in many years, for political reasons or difficulties in implementation, or also, for combination of factors of global economic crisis reasons.The search for a balance in economic relations around the Globe, and its regional impacts in Latin America, is common in foruns and international organizations, inclusively with repression to economic power abuse and the defense of the competition, considering this, an important element for the development of the region.In our study, we verify the importance for analysis involving competitors, because it is a starting point, the question of the relevant market limits.The search has verified how central this theme is in the anti-trust analysis and relevance of the debate about rights in competition for regional integration, focusing on Mercosul and its form of regulation.The regional integration is an important process in face of the global economic differences, and may contribute to a better efficiency of multilateral negotiation in global scale, becoming useful and necessary the international business control, in order to balance economic relations with competitors support.The relevance of the theme is revealed through frontiers transposition and business activities, leading to trespassing limits of international regulators.This statement puts the antitrust analysis in perspective, since national wide, the legislation and the agents reaction is restricted to the frontiers of the country, but on the sphere of the regional economic group, this legislation outside the territory may be and it is indeed usually, questioned, in case of the lack of specific regulation or norm, authorizing international cooperation from supra national institution, not disconsidering the hypothesis of recognition and application of norms edited by Mercosul as Common Law.This way, we intend to demonstrate the importance of the regulation theme in the anti trust scenario, focusing the question of a relevant market definition, specially in a regional economic group such as Mercosul.