Making contribution analysis work: a practical framework for handling influencing factors and alternative explanations

This article examines the methodological strengths and weaknesses of contribution analysis. The authors contend that a salient characteristic of contribution analysis is its accounting for influencing factors and alternative explanations. We argue that contribution analysis in its current form needs further methodological and practical elaboration in this respect. Therefore, this article pays particular attention to how the methodology can identify and determine the extent of influencing factors and alternative explanations. The authors propose a corresponding framework ? the Relevant Explanation Finder ? which can help evaluators account for these elements and thereby create more credible contribution stories.