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UNICEF Impact Evaluation Series: Data Collection & Analysis

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Impact evaluations need to go beyond assessing the size of the effects (i.e., the average impact) to identify for whom and in what ways a programme or policy has been successful. This video provides an overview of the issues involved in choosing and using data collection and analysis methods for impact evaluations. 

Context Matters for Size: Why External Validity Claims and Development Practice Don't Mix - Working Paper 336

Authors: Pritchett, L. & and Sandefur, J.
Publication date: July 8th, 2013

In this working paper of the Center for Global Development, the authors examine how policymakers and practitioners should interpret the impact evaluation literature when presented with conflicting experimental and non-experimental estimates of the same intervention across varying contexts.

Louise Shaxson (l.shaxson@odi.org.uk) reviewed the paper and shared the following comments:

The World Bank: Randomized trials

Authors: Gertler, PJ. et alii. (for The World Bank)
Publication date: 2010

This presentation constitutes supporting material for the World Bank "Impact Evaluation in Practice" book. It focuses on randomization for causal inference and presents a case study of a randomized trial in Colombia.

CSAE Scaling Up What Works: Experimental Evidence on External Validity in Kenyan Education

Authors: Bold, T.; Kimenyi, M.; Mwabu, G.; Ng'ang'a, A.; Sandefur, J.

Publication date: 2013

The recent wave of randomized trials in development economics has provoked criticisms regarding external validity. In this paper, the Centre for the Study of African Economies investigates two concerns – heterogeneity across beneficiaries and implementers – in a randomized trial of contract teachers in Kenyan schools.