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Title:The Evaluation of Community-Based Interventions: Group Randomization, Limits and Alternatives PDF Logo
Authors:Schmidt, Christoph M.
Baltussen, Rob
Sauerborn, Rainer
Issue Date:2000
Series/Report no.:IZA Discussion paper series 206
Abstract:The context of community-based interventions presents formidable problems for any evaluation analysis. Group-randomized studies do possess ideal properties in theory, but in practice, grouprandomization might not be a feasible alternative at all or group-randomized studies might be contaminated. Thus, the decisive advantage of randomized controlled trials, that they and only they provide for a completely convincing identification strategy in the presence of observable and unobservable confounders, is lost. There are alternative strategies for the identification of treatment effects also in the case of unobservable confounders, however, although they specifically require unverifiable a priori information to be available. Moreover, when using non experimental data, one can often easily extend sample size at low cost, and thus estimate parameters very precisely; therefore, for any particular situation the relative attractiveness of experimental and non-experimental approaches should be explored.
Subjects:Randomized controlled trials
econometric evaluation
observational studies
Document Type:Working Paper
Appears in Collections:IZA Discussion Papers, Forschungsinstitut zur Zukunft der Arbeit (IZA)

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