Programs to reduce traffic congestion and air pollution by restricting use of motor vehicles on working days have generally not met with success, given existing studies of such programs. We conduct the first study of Quito, Ecuador's four-year-old Pico y Placa program and find that it has...

As social interest in particulate matter (PM) increases, various abatement policies are being discussed and implemented. However, such a policy could lead to economic burdens for industries that emit large amounts of PM. For example, if we aim to limit PM emissions from industrial production...