During the 1990s, infrastructure concessions were hailed as the solution to Latin America's endemic infrastructure deficit, by combining private sector efficiency with rent dissipation brought about by competition. This publication examines the design and implementation of over 1,000 examples of concession contracts, in order to identify the problems that have occurred in the process. It goes on to highlight lessons to be learned for the future, in order to realise the potential benefits of infrastructure reform and to contribute to economic growth and poverty reduction.