The purpose of this systematic review and meta-analysis is to determine the effect of
lockdowns on COVID-19 mortality based on available empirical evidence. Lockdowns are …

We conducted a systematic literature review of general population testing, contact tracing,
case isolation and contact quarantine interventions to assess their effectiveness in reducing …

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

Carbon offsets from voluntary avoided-deforestation projects are generated on the basis of
performance in relation to ex ante deforestation baselines. We examined the effects of 26 …

The Effect: An Introduction to Research Design and Causality is about research design,
specifically concerning research that uses observational data to make a causal inference. It …

We use the synthetic control method to analyze the effect of face masks on the spread of
COVID-19 in Germany. Our identification approach exploits regional variation in the point in …

Synthetic control methods are commonly applied in empirical research to estimate the
effects of treatments or interventions on aggregate outcomes. A synthetic control estimator …

Populism at the country level is at an all-time high, with more than 25 percent of nations
currently governed by populists. How do economies perform under populist leaders? We …

The COVID-19 pandemic has created unprecedented burdens on people's physical health
and subjective well-being. While countries worldwide have developed platforms to track the …

Meeting the Paris Agreement's climate targets necessitates better knowledge about which
climate policies work in reducing emissions at the necessary scale. We provide a global …