Using data for 1995, the authors estimate union wage premia of about 20% for African workers and 10% for white workers - roughly similar to estimates reported for other countries, including the United States. African nonunion workers who were covered by industrial council agreements received a...

We develop a model of optimal schooling investments and estimate it using new data on approximately 700 identical twins. We estimate an average return to schooling of 9 percent for identical twins, but estimated returns appear to be slightly higher for less able individuals. Simple cross-section...

In a recent and widely cited paper, Ashenfelter and Krueger (1994) use a new sample of identical twins to test whether schooling represents an investment in human capital or is merely a proxy for genetic ability. I re-examine Ashenfelter and Krueger's estimates using three additional years of...

One of the best documented relationships in economics is the link between education and income: higher educated people have higher incomes. Advocates argue that education provides skills, or human capital, that raises an individual's productivity. Critics argue that the documented relationship...

We study the effects of a change in financial aid policy introduced by a Northeastern university in 1998. Prior to that time, the university’s financial aid packages for low income students consisted of grants, loans, and campus jobs. After the change, the entire loan portion of the package...

In this paper, we examine the determinants of returning to New Orleans in the 18 months after the hurricane. The data come from a study of low-income parents—mainly African American women—who were enrolled in a community college intervention prior to the hurricane. Although the sample is not...

Hurricane Katrina displaced approximately 650,000 people and destroyed or severely damaged 217,000 homes along the Gulf Coast. Damage was especially severe in New Orleans, and the return of displaced residents to this city has been slow. The fraction of households receiving mail (which, in the...

Although schools across the country are investing heavily in computers in the classroom, there is surprisingly little evidence that they actually improve student achievement. In this paper we present results from a randomized study of a well-defined use of computers in schools: a popular...

While numerous recent authors have studied the effects of school accountability systems on student test performance and school “gaming” of accountability incentives, there has been little attention paid to substantive changes in instructional policies and practices resulting from school...