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Quasi-experimental study designs series—paper 7: assessing the assumptions
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Journal Article
Quasi-experimental study designs series—paper 7: assessing the assumptions
2017
Overview
Quasi-experimental designs are gaining popularity in epidemiology and health systems research—in particular for the evaluation of health care practice, programs, and policy—because they allow strong causal inferences without randomized controlled experiments. We describe the concepts underlying five important quasi-experimental designs: Instrumental Variables, Regression Discontinuity, Interrupted Time Series, Fixed Effects, and Difference-in-Differences designs. We illustrate each of the designs with an example from health research. We then describe the assumptions required for each of the designs to ensure valid causal inference and discuss the tests available to examine the assumptions.
Publisher
Elsevier Inc,Elsevier Limited
