Khandker, S.R., Koolwal, G.B., & Samad, H.A. (2010). Handbook on Impact Evaluation: Quantitative Methods and Practices. The International Bank for Reconstruction and Development. Retrieved from:http://bit.ly/b5x0b4.
Public programs are designed to reach certain goals and beneficiaries. Methods to understand whether such programs actually work, as well as the level and nature of impacts on intended beneficiaries, are main themes of this book.Has the Grameen Bank, for example, succeeded in lowering consumption poverty among the rural poor in Bangladesh? Can conditional cash-transfer programs in Mexico and other Latin American countries improve health and schooling outcomes for poor women and chil- dren? Does a new road actually raise welfare in a remote area in Tanzania, or is it a “highway to nowhere”? Do community-based programs like the Thailand Village Fund project create long-lasting improvements in employment and income for the poor?
Programs might appear potentially promising before implementation yet fail to gen- erate expected impacts or benefits. The obvious need for impact evaluation is to help policy makers decide whether programs are generating intended effects; to promote accountability in the allocation of resources across public programs; and to fill gaps in understanding what works, what does not, and how measured changes in well-being are attributable to a particular project or policy intervention.