This book systematically examines the targeting performance of consumer utility subsidies in 32 programs from 13 water utilities as well as a similar sample of electricity utilities. Most of the programs involve volume-based subsidies, which are common in the water sector.
KOMIVES, K. FOSTER, V. HALPERN, J. WODON, Q. (2005): Water, Electricity, and the Poor: Who Benefits from Utility Subsidies? . Washington DC: The World Bank URL [Accessed: 29.04.2019] PDF