Corruption is widely viewed as a major obstacle to economic growth, investment and poverty reduction in developing countries, yet there have been relatively few detailed and open studies of the problem across sectors. In the World Bank's Diagnosing Corruption in Ethiopia: Perceptions, Realities and the Way Forward for Key Sectors, a team of sector specialists, including Roger Calow from ODI's Water Policy Programme, map out the risks, nature and impacts of corruption across eight different sectors in Ethiopia, including health, justice, telecommunications and water.

The mapping of corrupt practices follows a value chain approach, with each team moving from policy making and regulation at one end, to tendering, procurement and implementation at the other - an approach that could be applied in other countries and sectors. Roger Calow led the team looking at corruption risk in the delivery of rural water supplies, and is lead author of Chapter 4 Rural Water Supply Corruption in Ethiopia.