2 papers
stat.ME2021
Eliminating Systematic Bias from Difference-in-Differences Design: A Permutational Detrending Strategy
Xiaoming Wang, Sukun Wang
Since the initial work by Ashenfelter and Card in 1985, the use of difference-in-differences (DID) study design has become widespread. However, as pointed out in the literature, th…
stat.ME2020
Insight into bias in time-stratified case-crossover studies
Xiaoming Wang, Sukun Wang
The use of case-crossover designs has become widespread in epidemiological and medical investigations of transient associations. However, the most popular reference-select strategy…