Program evaluation methods are widely applied in economics to assess the effects of policy
interventions and other treatments of interest. In this article, we describe the main …

High-throughput single-cell profiling provides an unprecedented ability to uncover the
molecular states of millions of cells. These technologies are, however, destructive to cells …

In the context of sustainable development, countries around the world shed more light on
green innovation in their environmental policies, and the digital economy may take a vital …

This paper synthesizes recent advances in the econometrics of difference-in-differences
(DiD) and provides concrete recommendations for practitioners. We begin by articulating a …

Linear regressions with period and group fixed effects are widely used to estimate policie's
effects: 26 of the 100 most cited papers published by the American Economic Review from …

A recent literature has shown that when adoption of a treatment is staggered and average
treatment effects vary across groups and over time, difference-in-differences regression …

This paper proposes tools for robust inference in difference-in-differences and event-study
designs where the parallel trends assumption may be violated. Instead of requiring that …

We explain when and how staggered difference-in-differences regression estimators,
commonly applied to assess the impact of policy changes, are biased. These biases are …

To direct financial resources to cleaner production enterprises and achieve the goal of
environmental governance, the Chinese government has devoted increasing efforts to …

This paper is one of the first to offer a comprehensive analysis of the impact of green finance
related policies in China, utilizing text analysis and panel data from 290 cities between 2011 …