Conventional value-added models (VAMs) compare average test scores across schools
after regression-adjusting for students' demographic characteristics and previous scores …

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 …

We use admissions lotteries to estimate the effects of large-scale public preschool in Boston
on college-going, college preparation, standardized test scores, and behavioral outcomes …

School choice may lead to improvements in school productivity if parents' choices reward
effective schools and punish ineffective ones. This mechanism requires parents to choose …

We develop new tools for estimating the causal effects of treatments or instruments that
combine multiple sources of variation according to a known formula. Examples include …

Marketplaces are often small parts of large markets, and both markets and marketplaces
come in many varieties. Market design seeks to understand what marketplaces must …

COVID-19 has revealed limitations of existing mechanisms for rationing medical resources
under emergency scenarios. Many argue that these mechanisms abandon various ethical …

Several school districts use assignment systems that give students an incentive to
misrepresent their preferences. We find evidence consistent with strategic behavior in …

We develop a new approach to estimating the causal effects of treatments or instruments
that combine multiple sources of variation according to a known formula. Examples include …

We examine the impact of the expansion of charter schools on racial segregation in public
schools, defined using multiple measures of racial sorting and isolation. Our research …