This paper is a practical guide (a toolkit) for researchers, students and practitioners wishing
to introduce randomization as part of a research design in the field. It first covers the …

This chapter provides a comprehensive review of data quality of the third wave of the
Chinese Longitudinal Healthy Longevity Survey (CLHLS) in 2002 in terms of proxy use …

Micro-entrepreneurs often lack the financial literacy required to make important financial
decisions. We conducted a randomized evaluation with a bank in the Dominican Republic to …

This paper discusses the bias that results from using nonrandomly selected samples to
estimate behavioral relationships as an ordinary specification error or" omitted variables" …

Problems involving causal inference have dogged at the heels of statistics since its earliest
days. Correlation does not imply causation, and yet causal conclusions drawn from a …

Intestinal helminths—including hookworm, roundworm, whipworm, and schistosomiasis—
infect more than one‐quarter of the world's population. Studies in which medical treatment is …

This paper empirically assesses the wage effects of the Job Corps program, one of the
largest federally-funded job training programs in the United States. Even with the aid of a …

This paper examines the long-run causal effects of management on firm performance. Under
the United States Technical Assistance and Productivity Program (1952–1958), the United …

Most academic and development policy discussions about microentrepreneurs focus on
credit constraints and assume that subject to those constraints, the entrepreneurs manage …

Recently a growing body of research has studied inference in settings where parameters of
interest are partially identified. In many cases the parameter is real‐valued and the …