of major infrastructure projects in a Latin American country; 2) the documentation of the case study from the point of view of the public policy process (other authors have already documented the social movement in Atenco and Texcoco in 2001 and2002); and 3) the analysis of a sphere of non-electoral political competition as well as the implications for the evaluation of infrastructure projects. AbstractThe paper provides a historical review of the political decisions and public policy surrounding the project for a new airport in Mexico City. To this end, it uses two conceptual models within the public policy area: John Kingdon's multiple flows model and Sabatier andJenkinsSmith's political coalitions model (1993; 1999). In this respect, the main contributions are: 1) the application of these models to the area