ABSTRACT
Infrastructure is the basic facilities, services, and installations needed for the functioning of a community or society. Here I am mainly concerned with economic infrastructure, which consists of long-lived engineered structures, equipment and facilities, ranging from power plants and pipes for water and gas, to dams, roads, ports and airports. Infrastructure falls into two groups: transportation modalities and public utilities. This excludes a large stock of publicly owned capital such as hospital and school buildings. Infrastructure is often networked and benefits from significant economies of scale (World Bank 1994).
