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Contribution Analysis and Estimating the Size of Effects: Can We Reconcile the Possible with the Impossible?
Published by: IDS
While contribution analysis provides a step-by-step approach to verify whether and why an intervention is a contributory factor to development impact, most contribution analysis studies do not quantify the ‘share of contribution’ that can be attributed to a particular support intervention. Commissioners of evaluations, however, often want to understand the size or importance of a contribution, not least for accountability purposes.