Search our database of 1,200+ summaries of randomized evaluations conducted by our affiliates in 97 countries. To browse key policy recommendations from a subset of these evaluations, visit the Policy Publications tab above.

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Reducing Inappropriate Prescribing of Controlled Substances in the United States

Shantanu Agrawal
David Yokum
Researchers tested whether an informative letter campaign could reduce inappropriate prescribing of controlled substances in Medicare Part D. Letters had no detectable effect on prescribing. In ongoing work, researchers are testing alternative versions of letters.

Randomized Evaluation of the Nurse Family Partnership in South Carolina

Researchers are evaluating the impact of an intensive nurse home visiting program for low-income mothers on pregnancy and birth outcomes, child health and development, and future life-courses for the family. The program had no effect on adverse birth outcomes or prenatal outcomes such as health care...

Information to Increase Insurance Take-up and Reduce Market Risk in the United States

Richard Domurat
Isaac Menashe
Researchers studied the impact of reminder letters addressing possible barriers related to information and behavior on insurance take-up, as well as their impact on health insurance market risk. The reminder letters reducing informational and behavioral barriers to enrollment increased insurance...

Health Care Hotspotting in the United States

Joseph Doyle
Annetta Zhou
Rapidly rising health care costs in the United States have generated interest in identifying effective ways to improve the quality of care delivery and reduce waste within the health care system. In this study, researchers evaluated the impact of a care management program that provides medical and...

The Impact of Assignment to Different Managed Care Organizations on Medicaid Spending and Health Care Use in the United States

Researchers are conducting a randomized evaluation to test the relative impact of assignment to different MCOs on health care utilization and expenditure.

The Effect of Behavioral Nudges via Mailed Letters on Subsidized Health Insurance Take-up

This study examined the impact of an administrative simplification and a series of behavioral nudges (all via letters sent by mail) on enrollment in subsidized health insurance plans. The administrative simplification, which provided a streamlined path to enrollment, had the largest effect on...

Workplace Wellness Programs to Improve Employee Health Behaviors in the United States

Zirui Song
Researchers conducted a randomized evaluation of a comprehensive, multi-site workplace wellness program to evaluate the program’s impact on self-reported and clinical health outcomes, health care spending and utilization, and employment outcomes. The program did not have a measurable effect on any...

Prescribing Food as Medicine among Individuals Experiencing Diabetes and Food Insecurity in the United States

John Bulger
John Cawley
Joseph Doyle
Andrea Feinberg
Diabetes is one of the most prevalent diseases in the United States and is closely linked to food insecurity. Researchers evaluated the impact of an intensive food-as-medicine program that provides fresh food and diabetes education on health and health care utilization for individuals experiencing...