The Inter-American Development Bank and the Organisation for Economic Co-operation and Development co-operate in competition law and policy to promote increased economic growth, employment and economic efficiency and a higher average standard of living in the medium to long term. There is increasing consensus that sound competition law and policy are essential to achieving these goals. “Peer review” is a core element of OECD work. The mechanisms of peer review vary, but it is founded upon the willingness of all OECD countries and their partners to submit their laws and policies to substantive questioning by other members. This process provides valuable insights to the reviewed country and promotes transparency and mutual understanding for the benefit of all. The benefits of this process are particularly clear in the area of competition law and policy. As a result of the activities of the Competition Committee, OECD countries that once had real conflicts on competition issues have become partners in seeking to halt harmful international anticompetitive practices. The Committee has also become an important forum for assessing and demonstrating the usefulness of applying competition policy principles to economic and other regulatory systems. IDB/OECD co-operation in competition law and policy centers on annual meetings of the Latin American Competition Forum. LACF meetings include substantive roundtable discussions and peer reviews of national laws and institutions. The peer reviews have examined Brazil, Chile, Peru and now Argentina. The IDB is pleased to participate and finance this work, as part of its efforts to promote a better business climate for investment in the counties of Latin America and the Caribbean. We want to thank the Government of Argentina for volunteering to be peer reviewed at the fourth LACF meeting, held in San Salvador, El Salvador, on 11-12 July, 2006. It was encouraging to hear Argentina’s Delegation confirm at the meeting that the report’s recommendations were helpful and to hear from Delegates of other countries that this review has improved their understanding of Argentina’s competition law and policy. Finally, we want to thank Mr. John Clark, the author of the report, and the many competition officials whose written and oral contributions to the Forum have been so important to its success.