Restricción vehicular y regulación ambiental: el programa “Pico y Placa” en Medellín

This draft discusses the main instruments to mitigate environmental externalities, considering both the traditional goals of efficiency and equity and restrictions on information and technical and political feasibility. It is analyzed the program "Pico y Placa" in Medellín, a restricting vehicular mobility on the type of command and control, its efficiency and power using the theoretical results and some estimates of elasticities of demand for gasoline and vehicles in Medellin. It is recommended what are the policies most relevant to mobility and control pollution in a city as Medellín.