The World Bank has been promoting the public-private partnership model based on management contracts in developing countries. In such contracts, all the risks are borne by the government while the companies do not invest a penny.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/urban-water-supply-reforming-reformers
[2] http://admin.indiaenvironmentportal.org.in/category/author/amit-bhaduri
[3] http://admin.indiaenvironmentportal.org.in/category/journal/economic-and-political-weekly
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-water-supply
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/private-sector
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-sector
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-jal-board-djb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/right-information-rti