The WWC Attrition Standard: Sensitivity to Assumptions and Opportunities for Refining and Adapting to New Contexts

John Deke and Hanley Chiang

Mathematica Policy Research Reports from Mathematica Policy Research

Abstract: The purpose of this article is to explain the WWC attrition model, how that model is used to establish attrition bounds, and to assess the sensitivity of attrition bounds to key parameter values.

Keywords: methodological development; content area; real-world dissemination; design and evaluation of programs and policies; outcome evaluation (other than economic evaluation); economic evaluation; design; WWC; What Works Clearinghouse (search for similar items in EconPapers)
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