Derives closed-form multi-level asymptotic variance for individual-level OLS in switchback experiments, showing macro shocks create a power floor penalized by cluster size imbalance.
arXiv preprint arXiv:2602.23257 , year=
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Powerful Switchback Experiments -- Or Not?
Derives closed-form multi-level asymptotic variance for individual-level OLS in switchback experiments, showing macro shocks create a power floor penalized by cluster size imbalance.