Rational voters update their subjective beliefs about candidates' attributes with the arrival of information, and subsequently base their votes on these beliefs. Information accrual is, however, endogenous to voters' types and difficult to identify in observational studies. In a large scale...

Read the final report from a large-scale, rigorous study examining how four math curricula affect achievement across two years—from first through second grades. The curricula were (1) Investigations in Number, Data, and Space; (2) Math Expressions; (3) Saxon Math; and (4) Scott...

This appendix provides the details that underlie the analyses reported in the evaluation brief, “After Two Years, Three Elementary Math Curricula Outperform a Fourth.†The details are organized in six sections: Study Curricula and Design (Section A), Data Collection (Section B),...

Many education policy experts have raised concerns that disadvantaged students, who are often concentrated in low-performing schools, do not have the same access to highly effective teachers as other students. To address this issue, the U.S. Department of Education, Institute of Education...

This article presents methodological and design issues for researchers to consider when addressing disability-related comparative effectiveness research questions.

Abstract: We use an RCT to analyze the impact of microcredit on poverty reduction. The study population consists of loan applicants to a large microfinance institution in Bosnia and Herzegovina who would have been rejected through regular screening. Access to credit allowed borrowers to start...

Background In the last decade, network meta-analysis of randomized controlled trials has been introduced as an extension of pairwise meta-analysis. The advantage of network meta-analysis over standard pairwise meta-analysis is that it facilitates indirect comparisons of multiple interventions...