This paper contributes to literature on the process of reform in Latin America. through a study of the political economy aspects and the policy making process of reforms in what are identified as the five critical steps through the “life cycle” of a policy reform: Planning, Dialogue, Adoption, Implementation and Sustainability. The paper illustrates that the most important actors involved and the major bottlenecks vary at different stages of the reform process. Explanations for successful or failed reform experiments must therefore adequately account for this temporal dimension of reforms.