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Date: 2016-02-01 06:35:42Design of experiments Experiments Observational study Clinical research Research methods Impact evaluation Randomized controlled trial Natural experiment Clinical trial Evidence-based medicine Evaluation Quasi-experiment | SERIES PAPER DISCUSSION IZA DP No. 9696Add to Reading ListSource URL: ftp.iza.orgDownload Document from Source WebsiteFile Size: 717,61 KBShare Document on Facebook |