This paper considers the difference-in-differences (DID) method when the data come from repeated cross-sections and the treatment status is observed either before or after the...

This article evaluates an expansion of employer-mandated sick leave from 80% to 100% of forgone gross wages in Germany. We employ and compare parametric difference-in-difference...

The external validity of experiments in economics can be ensured only if participants reflect the relevant market population. We study data from a promotional campaign of...