Ongoing empirical research on the drivers of project-aid effectiveness relies on World Bank evaluation ratings across heterogeneous aid sectors. This leads to two problems. First, it is difficult to identify which dimension of project performance World Bank evaluation ratings are measuring...

Financing and the role of aid within the water sector are poorly understood. We estimate the levels of spending achieved in developing countries during the Millennium Development Goals period to be US$80 billion per year. Aid represented a substantial proportion of total sector financing in...