We estimate the causal impact of school and classroom gender composition on achievement. We take advantage of the random assignment of Korean middle school students to single-sex schools, co-educational (coed) schools with single-sex classes, and coed schools with mixed-gender classes. Male...

Primary care physicians play a substantial role in diagnosing and treating children's mental health disorders, but Medicaid managed care policies may limit these physicians' ability to serve low‐income children. Using data from the universe of Medicaid recipients in three states, I evaluate...

Although employment among welfare mothers increased substantially following the 1996 welfare reform, some former welfare recipients failed to find stable employment. We review the extent to which low-income mothers are without work and cash welfare for long periods of time and seek to understand...

Charitable donations provide positive externalities and can potentially be increased with an understanding of donor preferences. We obtain a uniquely comprehensive characterization of donation motives using an experiment that varies treatments between and within subject. Donations are increasing...

We estimate effects of the Pell Grant - the largest U.S. federal grant for college students - using administrative data from Texas public colleges and a discontinuity in grant generosity for low-income students. Within four-year institutions, eligibility for additional grant aid significantly...

Can social norms affect fundamental patterns of behavior such as income effects? Studies of determinants of giving to charities and other individuals yield a wide range of income-effect estimates. We conduct two experiments to first test whether the effect of income on charitable giving depends...

How do radical reforms of the state shape economic development over time? In 1790, France's first Constituent Assembly overhauled the kingdom's organization to set up new administrative entities and local capitals. In a subset of departments, new capitals were chosen quasi-randomly as the...

Charitable fundraisers frequently announce giving by others, and research shows that this can increase donations. However, this mechanism may not put information about peers to the most efficient use if it is costly to inform individuals who are indifferent to peer actions or causes some...