In many randomized trials, subjects enter the sample sequentially. Because the covariates for all units are not known in advance, standard methods of stratification do not apply. We describe and assess the method of DA-optimal sequential allocation (Atkinson, 1982) for balancing stratification...

Basic sanitation and hygiene can prevent roughly a million deaths a year. This study examines the rapid prototyping of a pilot school-based handwashing, safe water, and sanitation program in Chennai, India. Our content analysis identified challenges in the classroom (Localization; Curriculum...

This study uses the National Educational Longitudinal Study of 1988 (NELS) to replicate both the analysis in The Bell Curve and that of several of its previous replications. We examine the relative importance of test scores and family background in predicting dropping out of high school,...

On average, infant mortality rates are lower in more industrialized nations, yet health and mortality worsened during early industrialization in some nations. This study examines the effects of growing manufacturing employment on infant mortality across 274 Indonesian districts from 1985 to...

A model of security design based on the principle of information aggregation and alignment is used to show that (i) firms needing to finance their operations should issue different securities to different groups of investors in order to aggregate their disparate information and (ii) each...

Ratings of corporations' environmental activities and capabilities influence billions of dollars of socially responsible investments as well as some consumers, activists, and potential employees. In one of the first studies to assess these ratings, we examine how well the most widely used...