In this paper, we describe a computational implementation of the Synthetic difference-in-differences (SDID) estimator of Arkhangelsky et al. (2021) for Stata. Synthetic difference-in-differences can be used in a wide class of circumstances where treatment effects on some particular policy or...

We develop a framework for difference-in-differences designs with staggered treatment adoption and heterogeneous causal effects. We show that conventional regression-based estimators fail to provide unbiased estimates of relevant estimands absent strong restrictions on treatment-effect...

Linear regressions with period and group fixed effects are widely used to estimate policies' effects: 26 of the 100 most cited papers published by the American Economic Review from 2015 to 2019 estimate such regressions. It has recently been shown that those regressions may produce misleading...

We link newly-digitized personnel records of the U.S. government for 1907-1921 to census data to study the segregation of the civil service by race under President Woodrow Wilson. Using a difference-in-differences design around Wilson’s inauguration, we find that the introduction of employment...

Using micro-level panel data and a difference-in-differences identification strategy, we study the effect of political uncertainty on household stock market participation. We find that households significantly reduce their participation and reallocate funds to safer assets during periods of...

We evaluate the efficacy of the Secondary Market Corporate Credit Facility (SMCCF), a program designed to stabilize the corporate bond market in the wake of the COVID-19 shock. The Fed announced the SMCCF on March 23 and expanded the program on April 9. Regression discontinuity estimates imply...

We study the effect of a reduction in employment protection on workers’ fertility decisions. Using data from the Italian Labor Force Survey for 2013-2018, we analyze how the propensity to have a child has been affected by the 2015 labor market reform dubbed the “Jobs Act,” which reduced...

We estimate the effects of worker voice on job quality and separations. We leverage the 1991 introduction of worker representation on boards of Finnish firms with at least 150 employees. In contrast to exit-voice theory, our difference-in-differences design reveals no effects on voluntary job...

A growing number of American children are exposed to gun violence at their schools, but little is known about the impacts of this exposure on their human capital attainment and economic well-being. This paper studies the causal effects of exposure to shootings at schools on children’s...

A growing number of American children are exposed to gun violence at their schools, but little is known about the impacts of this exposure on their human capital attainment and economic well-being. This paper studies the causal effects of exposure to shootings at schools on children's...

This paper exploits exogenous variation in the adoption of copyrights – as a result of the timing of Napoléon’s military victories in Italy – to examine the effects of copyrights on creativity. To measure changes in creative output we compare changes in the creation of new operas across...

We estimate the effects of worker voice on job quality and separations. We leverage the 1991 introduction of worker representation on boards of Finnish firms with at least 150 employees. In contrast to exit-voice theory, our difference-in-differences design reveals no effects on voluntary job...

We study the effect of a reduction in employment protection on fertility decisions. Using data from the Italian Labor Force Survey for the years 2013-2018, we analyze how the propensity to have a child has been affected by the 2015 Labor Market Reform, the so-called "Jobs Act", which has...

We evaluate the efficacy of the Secondary Market Corporate Credit Facility (SMCCF), a program designed to stabilize the corporate bond market in the wake of the Covid-19 shock. The Fed announced the SMCCF on March 23 and expanded the program on April 9. Regression discontinuity estimates imply...

We evaluate the efficacy of the Secondary Market Corporate Credit Facility (SMCCF), a program designed to stabilize the corporate bond market in the wake of the COVID-19 shock. The Fed announced the SMCCF on March 23 and expanded the program on April 9. Regression discontinuity estimates imply...

We evaluate the efficacy of the Secondary Market Corporate Credit Facility (SMCCF), a program designed to stabilize the corporate bond market in the wake of the COVID-19 shock. The Fed announced the SMCCF on March 23 and expanded the program on April 9. Regression discontinuity estimates imply...

We study the effect of a reduction in employment protection on fertility decisions. Using data from the Italian Labor Force Survey for the years 2013-2018, we analyze how the propensity to have a child has been affected by the 2015 Labor Market Reform, the so-called "Jobs Act", which has...

This paper exploits exogenous variation in the adoption of copyrights - as a result of the timing of Napoléon's military victories in Italy - to examine the effects of copyrights on creativity. To measure changes in creative output we compare changes in the creation of new operas across states...

A growing number of American children are exposed to gun violence at their schools, but little is known about the impacts of this exposure on their human capital attainment and economic well-being. This paper studies the causal effects of exposure to shootings at schools on children's...

A growing number of American children are exposed to gun violence at their schools, but little is known about the impacts of this exposure on their human capital attainment and economic well-being. This paper studies the causal effects of exposure to shootings at schools on children's...

Using micro-level panel data and a difference-in-differences identification strategy, we study the effect of political uncertainty on household stock market participation. We find that households significantly reduce their participation and reallocate funds to safer assets during periods of...

This paper contributes to a sparse literature on merger remedies amid renewed interest in assessing remedy effectiveness by global antitrust policy agencies. Despite frequent use in practice, merger remedies receive little attention in the economics literature. We address this deficiency by...

Linear regressions with period and group fixed effects are widely used to estimate policies' effects: 26 of the 100 most cited papers published by the American Economic Review from 2015 to 2019 estimate such regressions. It has recently been show that those regressions may produce misleading...

We study two-way-fixed-effects regressions (TWFE) with several treatment variables. Under a parallel trends assumption, we show that the coefficient on each treatment identifies a weighted sum of that treatment's effect, with possibly negative weights, plus a weighted sum of the effects of the...