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Impact Evaluations and Development - NONIE Guidance on Impact Evaluation

Frans Leeuw and Jos Vaessen

Summary: The Guidance is structured around nine key issues in impact evaluation:

1. Identify the (type and scope of the) intervention
2. Agree on what is valued
3. Carefully articulate the theories linking interventions to outcomes
4. Address the attribution problem
5. Use a mixed methods approach: The logic of the comparative advantages of methods
6. Build on existing knowledge relevant to the impact of interventions
7. Determine if an impact evaluation is feasible and worth the cost
8. Start collecting data early
9. Front-end planning is important

The discussion of these nine issues constitutes the structure of this Guidance document. The first part, comprising the first six issues deals with methodological and conceptual issues in IE and constitutes the core of the Guidance document. In addition, a shorter second part focuses on managing IE and addresses aspects of evaluability, benefits and costs of IE and planning. There is no universally accepted definition of rigorous impact evaluation. There are some who equate rigorous IE with particular methods and designs. In our view rigorous impact evaluation is more than a methodological design. Rigorous impact evaluation requires addressing the issues described above in an appropriate manner, especially the core methodological and conceptual issues

Type: How To Guides

Theme: Information, Knowledge and Learning

Contibuted by: Ricardo Wilson-Grau, on: 25 Apr 2010

Downloads: 554

Download resource (pdf 1970 KB)

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