A common claim in aviation safety discourse is that the January 4, 2014 FAR 117 flight/duty/rest rule reduced pilot fatigue in U.S.
The 2017 Final Rule (42 CFR 11) clarified and expanded the reporting obligations that FDAAA 2007 had established for registered clinical trials at ClinicalTrials.gov.
Latency arbitrage profits decreased 73% after speed bump introduction. Difference-in-differences across 14 venues (7 treated, 7 control), 2019--2024.
We provide causal evidence that free trade agreements increase within-country regional inequality by 0.7 gini points: a staggered difference-in-differences approach.
Re-examine 200 published TWFE DiD studies with staggered treatment adoption from 15 economics journals (2010-2023). Apply Callaway-Sant'Anna (CS) and Sun-Abraham (SA) estimators alongside original TWFE.