The view that empirical strategies in economics should be transparent and credible now goes almost without saying. The local average treatment effects (LATE) framework for causal inference helped make this so. The LATE theorem tells us for whom particular instrumental variables (IV) and...

Two-stage least squares estimates in heavily over-identified instrumental variables (IV) models can be misleadingly close to the corresponding ordinary least squares (OLS) estimates when many instruments are weak. Just-identified (just-ID) IV estimates using a single instrument are also biased,...

School assignment in Boston and New York City came to national attention in the 1970s as courts across the country tried to integrate schools. Today, district-wide choice allows Boston and New York students to enroll far from home, perhaps enhancing integration. Urban school transportation is...

Many personal and policy decisions turn on perceptions of school effectiveness, defined here as the causal effect of attendance at a particular school or set of schools on student test scores and other outcomes. Widely-disseminated school ratings frameworks compare average student achievement...

Pragmatic cancer screening trials mimic real-world scenarios in which patients and doctors are the ultimate arbiters of treatment. Intention-to-screen (ITS) analyses of such trials maintain randomization-based apples-to-apples comparisons, but differential adherence (the failure of subjects...

School authorities, universities, and employers often schedule multiple tests on the same day or week, causing overlapping exam preparation and a dense testing schedule. This multitask learning can be intense, under pressure, and challenge the student's mental and physical perseverance. As a...

We estimate the effects of gifted children programs (GCP) in high schools in Israel. We selected a comparison group of equally gifted students from other cities where GCP was not offered at the time. Based on administrative data, we follow 22 cohorts and measure treatment effects on outcomes,...

Research on the political and social impacts of financial crises has focused chiefly on free market economies, hindering our understanding of their effects in other settings. We exploit an episode of a financial crisis that hit the Israeli kibbutzim to study its impact in a socialist context....

We study the effects of labor market liberalization on political behavior and attitudes towards free-market capitalism and socialism, exploiting a reform whereby the Israeli socialist communities called kibbutzim shifted from equal sharing to market-based wages. Our identification strategy...

Literature has shown that air pollution can have short- and long-term adverse effects on physiological and cognitive performance, leading to adverse outcomes in the labor market. In this study, we estimate the effect of increased nitrogen dioxide (NO₂), one of the primary air pollutants, on...