Consistent with the New Public Management quest for efficiency and effectiveness, the demand for evidence-based-policy (EBP) within the development assistance sector has increased. Impact evaluations are one of the instruments used for gathering evidence, but to what extend does this evidence on factors that determine the success or failure of aid policy (programs) lead to aid policy reforms? This paper reviews the current literature on EPB in the development aid sector (both theoretical and empirical) and investigates the factors that facilitate the use of evidence from impact evaluations in development aid policy reforms.
