When there are multiple outcome series of interest, Synthetic Control analyses typically proceed by estimating separate weights for each outcome. In this paper, we instead propose estimating a common set of weights across outcomes, by balancing either a vector of all outcomes or an index or...

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...

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...

The Generalized System of Preferences (GSP) was established to promote the exports of low-income countries to industrialized countries in order to support their economic growth and development. However, the design of these schemes is rather complex and the effects of GSP have been found to be...

We analyze the properties of the Synthetic Control (SC) and related estimators when the pre‐treatment fit is imperfect. In this framework, we show that these estimators are generally biased if treatment assignment is correlated with unobserved confounders, even when the number of...

This study examines the European Commission's 2011 call for advice to the European Insurance and Occupational Pensions Authority (EIOPA) on the improvement of the Institutions for Occupational Retirement Provision (IORP) Directive (the "IORP Directive"). Specifically, it uses both the EIOPA...

Difference-in-differences analysis with staggered treatment timing is frequently used to assess the impact of policy changes on corporate outcomes in academic research. However, recent advances in econometric theory show that such designs are likely to be biased in the presence of treatment...

Since the post war period, the EU Common Commercial Policy (CCP) has moved in twodirections mainly through Preferential Trade agreements (PTAs): a deeper (internal) trade integrationprocess intended to reinforce trade relations among European countries (i.e. CustomUnion, Single Market, European...

Since the post war period, the EU Common Commercial Policy (CCP) has moved in two directions mainly through Preferential Trade agreement (PTAs): a deeper (internal) trade integration process intended to reinforce trade relations among European countries (i.e. Custom Union, Single Market,...

We nest an extended two-way fixed effect (ETWFE) estimator for staggered difference-in-differences within the structural gravity model. To test the ETWFE, we estimate the effects of regional trade agreements (RTAs). The results suggest that RTA estimates in the current gravity literature may be...