Drawing on the World Bank's PrivateParticipation in Infrastructure Project Database, this Noteprovides an overview of private activity in infrastructurein developing countries between 1990 and 2000. Three maintrends characterized that decade: Private activity ininfrastructure grew each year except 1998 and 1999. Mostdeveloping countries introduced some form of privateactivity in infrastructure. But Latin America and East Asiacaptured most of the investment. The 1990s marked thereemergence of private participation in infrastructure inthe developing world after decades of nationalization andpublic sector management. Between 1990 and 2000, 130developing countries had infrastructure projects withprivate participation, and 54 of them introduced privateparticipation in at least three infrastructure sectors.During that decade developing country governmentstransferred to the private sector the operating orconstruction risk, or both, for more than 2,300infrastructure projects and attracted investment commitmentsof almost US$690 billion.1 Those projects were implementedunder a range of schemes: management contracts,divestitures, and greenfield facilities (build-operate-owncontracts, build-operate-transfer contracts, and merchant facilities).