Very important, thorough, and careful new paper strengthens Clifford, Sheagley, and Piston's (2021, APSR) evidence that pre-post designs don't attenuate treatment effects very much relative to the shrinkage in the standard errors.
Measure outcomes before and after the treatment!
Measure outcomes before and after the treatment!
Reposted from
Andrew Trexler
New paper with @dianamejordan.bsky.social and sky-less Trent Ollerenshaw! We provide large-N tests of repeated measure designs in survey experiments, showing that they slightly attenuate ATEs relative to post-only designs, but provide large gains to precision. Thread below.
Preprint: osf.io/q6czp
Preprint: osf.io/q6czp
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