Suchergebnisse

"The racial achievement gap in education is an important social problem to which decades of research have yielded no scalable solutions. Recent evidence from 'No Excuses' charter schools - which demonstrates that some combination of school inputs can educate the poorest minority children - offers a guiding light. In the 2010-2011 school year, we implemented five strategies gleaned from best practices in "No Excuses" charter schools - increased instructional time, a more rigorous approach to building human capital, more student-level differentiation, frequent use of data to inform instruction, and a culture of high expectations - in nine of the lowest performing middle and high schools in Houston, Texas. We show that the average impact of these changes on student achievement is 0.276 standard deviations in math and 0.059 standard deviations in reading, which is strikingly similar to reported impacts of attending the Harlem Children's Zone and Knowledge is Power Program schools - two strict "No Excuses" adherents. The paper concludes with a speculative discussion of the scalability of the experiment"--National Bureau of Economic Research web site

"Affirmative action policies are practiced around the world. This paper explores the welfare economics of such policies. A model is proposed where heterogeneous agents, distinguished by skill level and social identity, compete for positions in a hierarchy. The problem of designing an efficient policy to raise the status in this competition of a disadvantaged identity group is considered. We show that: (i) when agent identity is fully visible and contractible (sightedness), efficient policy grants preferred access to positions, but offers no direct assistance for acquiring skills; and, (ii) when identity is not contractible (blindness), efficient policy provides universal subsidies when the fraction of the disadvantaged group at the development margin is larger then their mean (across positions) share at the assignment margin"--National Bureau of Economic Research web site

"There are large and important differences between blacks and whites in nearly every facet of life - earnings, unemployment, incarceration, health, and so on. This chapter contains three themes. First, relative to the 20th century, the significance of discrimination as an explanation for racial inequality across economic and social indicators has declined. Racial differences in social and economic outcomes are greatly reduced when one accounts for educational achievement; therefore, the new challenge is to understand the obstacles undermining the development of skill in black and Hispanic children in primary and secondary school. Second, analyzing ten large datasets that include children ranging in age from eight months old to seventeen years old, I demonstrate that the racial achievement gap is remarkably robust across time, samples, and particular assessments used. The gap does not exist in the first year of life, but black students fall behind quickly thereafter and observables cannot explain differences between racial groups after kindergarten. Third, we provide a brief history of efforts to close the achievement gap. There are several programs -- various early childhood interventions, more flexibility and stricter accountability for schools, data-driven instruction, smaller class sizes, certain student incentives, and bonuses for effective teachers to teach in high-need schools, which have a positive return on investment, but they cannot close the achievement gap in isolation. More promising are results from a handful of high-performing charter schools, which combine many of the investments above in a comprehensive framework and provide an "existence proof" -- demonstrating that a few simple investments can dramatically increase the achievement of even the poorest minority students. The challenge for the future is to take these examples to scale"--National Bureau of Economic Research web site

"There is a debate among social scientists regarding the existence of a peer externality commonly referred to as 'acting white.' Using a newly available data set (the National Longitudinal Study of Adolescent Health), which allows one to construct an objective measure of a student's popularity, we demonstrate that there are large racial differences in the relationship between popularity and academic achievement; our (albeit narrow) definition of 'acting white.' The effect is intensified among high achievers and in schools with more interracial contact, but non-existent among students in predominantly black schools or private schools. The patterns in the data appear most consistent with a two-audience signaling model in which investments in education are thought to be indicative of an individual's opportunity costs of peer group loyalty. Other models we consider, such as self-sabotage among black youth or the presence of an oppositional culture, all contradict the data in important ways"--National Bureau of Economic Research Web site