What We're Learning

We are committed to sharing the results of our grantmaking and the lessons we learn as we carry out our work. We believe it is important to evaluate and reflect regularly, study the findings of research and reports generated with our support, and communicate the results with those in the field and with the public.Read more about our learning philosophy

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A Science-based Approach to Early Childhood Development

A report by the Center on the Developing Child at Harvard University proposes a research and development platform to catalyze development in early childhood policy and practice, fueled by advances in science and an emphasis on innovation.  More

Progress on Nuclear Disarmament, Nonproliferation Inadequate

A study by the Arms Control Association finds the United States failed to make progress on key nuclear disarmament issues over the last three years, but did achieve important steps on nuclear materials security and strengthening nonproliferation norms. More

Mission Investments Can Catalyze Climate Solutions

A report by the Redstone Strategy Group examines how foundations can use mission investments alongside grant portfolios to accelerate climate solutions.  More

A Guide to Evidence-Based Budget Development

A brief by the Pew-MacArthur Results First Initiative outlines steps that state and local governments can take to more effectively use data to inform their budget decisions. More

Mapping Incarceration Trends by U.S. County

The Vera Institute of Justice’s Incarceration Trends Project collects and analyzes information on current jail and prison populations and historic incarceration trends in every U.S. county. More

Shifting Gears on Juvenile Justice Communications

Tools developed by FrameWorks Institute, recipient of the MacArthur Award for Creative and Effective Institutions, help advocates develop an effective narrative to advance juvenile justice reform. More

Chicago Program Cuts Arrests Among Youth

An evaluation of Youth Guidance’s Becoming a Man (BAM) program found that the program significantly reduced violent crime while high-school graduations rose sharply among program participants.  More

Most Biodiverse Countries Spending the Least on Conservation, Study Finds

Countries near or in the tropics, where most of the world’s diversity is located, spent the least on biodiversity conservation. More

Estimates of the Undocumented by Metropolitan Area

The MacArthur-supported report was released in anticipation of the Supreme Court’s decision in Texas v. United States, which will determine whether the DACA-plus and DAPA programs will continue. More

Report Examines International Lessons on Affordable Housing

A report by the Housing Partnership Network reviews international efforts to expand affordable housing and recommends broader engagement by social enterprises and more efficient delivery of capital to improve access to quality, affordable housing.  More