How to Increase Power Without Increasing Sample Size

[From the blog “Power to the Plan” by Clare Leaver, Owen Ozier, Pieter Serneels, and Andrew Zeitlin, posted at BITSS] “…Our blinded pre-analytical work uncovered two decision margins that could deliver substantial increases in power: changing test statistics used and putting structure on…

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80% Power? Really?

[From the blog “The “80% power” lie” posted by Andrew Gelman in December 2017 at Statistical Modeling, Causal Inference, and Social Science] “Suppose we really were running studies with 80% power. In that case, the expected z-score is 2.8, and…

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BROWN, LAMBERT, & WOJAN: At the Intersection of Null Findings and Replication

Replication is an important topic in economic research or any social science for that matter. This issue is most important when an analysis is undertaken to inform decisions by policymakers. Drawing inferences from null or insignificant finding is particularly problematic…

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