The core assumption to identify the treatment effect in difference-in-differences estimators is the so-called Parallel … usefulness of our approach by revising the results of several recent papers in which the difference-in-differences technique has … been applied.The core assumption to identify the treatment effect in difference-in-differences estimators is the so …

rates between Swedish regions to estimate the impact of the pandemic. Using difference-in-differences and high …

years 2000-2006 and perform a double difference-in-differences estimation. The results show that the enlargement …

/methodology/approach Since the program was carried out in selected counties, the authors employ a difference in differences approach doing …

, namely, the difference-in-differences method and a simple moving average time series analysis, to analyze both the short … reference service. In addition, this paper is the first to apply the difference-in-differences approach in the field of library …

insurance by applying the difference-in-differences and triple differences methodologies. Findings The results show that …