How can the impact of aid be estimated in the presence of fungibility? And how far does fungibility reduce its benefits? These questions are analyzed in a context where a donor wants to target its efforts on a specific sector and specific geographic areas. A traditional...

The authors examine the role of governance-measured by level of corruption and quality of bureaucracy-and ask how it affects the relationship between public spending and outcomes. Their main innovation is to see if differences in efficacy of public spending can be explained by quality of...