Impact Evaluation Studies

Until 2006, impact evaluation in ADB were based on desk review of project documents, analysis of project benefit monitoring and evaluation data, short field visits to project sites, project economic analysis, and/or small sample survey of beneficiary households. Since 2007, impact evaluations have been more rigorous and are based on identification of valid comparison groups (counterfactuals), large sample surveys, and application of appropriate quantitative analytical methods, supplemented by qualitative analysis.