This note, which draws on the WorldBank's Private Participation in Infrastructure (PPI)database, provides an overview of recent trends ininfrastructure projects with private participation indeveloping countries. Three main trends have emerged duringthe past decade. Private activity in infrastructure grewdramatically between 1990 and 1997, but declined because ofthe financial crises of 1998-99. Most developing countrieshave some private activity in infrastructure, but LatinAmerica, and East Asia dominate investments. It is suggestedthat private infrastructure activity in developing economieswill revive as they recover form the economic crisis of thelate 1990s, and the fundamental reasons for long-termprivate activity, - increasing demand for infrastructure,sector inefficiencies, and public budget constraints - will continue.