Scaling the Digital Divide: Home Computer Technology and Student Achievement

Assesses the effect of access to home computers and broadband Internet on students' math and reading test scores and its potential to close the achievement gap for the disadvantaged. Considers the role of parental monitoring

Public School Choice And Integration: Evidence from Durham, North Carolina

Using evidence from Durham, North Carolina, we examine the impact of school choice programs on racial and class-based segregation across schools. Theoretical considerations suggest that how choice programs affect segregation will depend not only on the family preferences emphasized in the sociology literature but also on the linkages between student composition, school quality and student achievement emphasized in the economics literature. Reasonable assumptions about the distribution of preferences over race, class, and school characteristics suggest that the segregating choices of students from advantaged backgrounds are likely to outweigh any integrating choices by disadvantaged students. The results of our empirical analysis are consistent with these theoretical considerations. Using information on the actual schools students attend and on the schools in their assigned attendance zones, we find that schools in Durham are more segregated by race and class as a result of school choice programs than they would be if all students attended their geographically assigned schools. In addition, we find that the effects of choice on segregation by class are larger than the effects on segregation by race

City Taxes and Property Tax Bases

This paper investigates the simultaneous relationship between tax rates and city property tax bases using data for 86 large U.S. cities in 1967, 1972, 1977, and 1982. We find that a 10 percent increase in the city's property tax rate decreases the city's tax base by about 1.5 percent. In addition, local income taxes and taxes levied by overlying jurisdictions (such as county and state governments) also have negative impacts on the city's property tax base. Local sales taxes, in contrast, appear to have little impact. We conclude that taxes affect local property values more than is typically implied by previous studies that have investigated the impacts of state and local taxes on firms' location decisions.

Teacher Mobility, School Segregation, and Pay-Based Policies to Level the Playing Field

Analyzes the effectiveness of using salary differentials to help schools serving disadvantaged students attract and retain highly qualified teachers. Examines teachers' responses to salary incentives and school characteristics by qualifications

Are Teacher Absences Worth Worrying About in the U.S.?

Using detailed data from North Carolina, we examine the frequency, incidence, and consequences of teacher absences in public schools, as well as the impact of an absence disincentive policy. The incidence of teacher absences is regressive: schools in the poorest quartile averaged almost one extra sick day per teacher than schools in the highest income quartile, and schools with persistently high rates of teacher absence were much more likely to serve low-income than high-income students. In regression models incorporating teacher fixed effects, absences are associated with lower student achievement in elementary grades. Finally, we present evidence that the demand for discretionary absences is price-elastic. Our estimates suggest that a policy intervention that simultaneously raised teacher base salaries and broadened financial penalties for absences could both raise teachers' expected income and lower districts' expected costs.

How and Why do Teacher Credentials Matter for Student Achievement?

Education researchers and policy makers agree that teachers differ in terms of quality and that quality matters for student achievement. Despite prodigious amounts of research, however, debate still persists about the causal relationship between specific teacher credentials and student achievement. In this paper, we use a rich administrative data set from North Carolina to explore a range of questions related to the relationship between teacher characteristics and credentials on the one hand and student achievement on the other. Though the basic questions underlying this research are not new - and, indeed, have been explored in many papers over the years within the rubric of the "education production function" - the availability of data on all teachers and students in North Carolina over a ten-year period allows us to explore them in more detail and with far more confidence than has been possible in previous studies. We conclude that a teacher's experience, test scores and regular licensure all have positive effects on student achievement, with larger effects for math than for reading. Taken together the various teacher credentials exhibit quite large effects on math achievement, whether compared to the effects of changes in class size or to the socio-economics characteristics of students, as measured, for example, by the education level of their parents.

Federal Oversight, Local Control, and the Specter of "Resegregation" in Southern Schools

Analyzing data for the 100 largest school districts in the South and Border states, we ask whether there is evidence of "resegregation" of school districts and whether levels of segregation can be linked to judicial decisions. We distinguish segregation measures indicating the extent of racial isolation from those indicating the degree of racial imbalance across schools. For the period 1994 to 2004 the trend in only one measure of racial isolation is consistent with the hypothesis that districts in these regions are resegregating. Yet the increase in this measure appears to be driven by the general increase in the nonwhite percentage in the student population rather than policy-determined increases in racial imbalance. Racial imbalance itself shows no trend over this period. Racial imbalance is nevertheless associated with judicial declarations of unitary status, suggesting that segregation in schools might have declined had it not been for the actions of federal courts. This estimated relationship is subject to a lag, which is in keeping with the tendency for courts to grant unitary status only if districts agree to limit their own freedom to reassign students.

Teacher Credentials and Student Achievement in High School: A Cross-Subject Analysis with Student Fixed Effects

We use data on statewide end-of-course tests in North Carolina to examine the relationship between teacher credentials and student achievement at the high school level. The availability of test scores in multiple subjects for each student permits us to estimate a model with student fixed effects, which helps minimize any bias associated with the non-random distribution of teachers and students among classrooms within schools. We find compelling evidence that teacher credentials affect student achievement in systematic ways and that the magnitudes are large enough to be policy relevant. As a result, the uneven distribution of teacher credentials by race and socio-economic status of high school students -- a pattern we also document -- contributes to achievement gaps in high school.

The Academic Achievement Gap in Grades 3 to 8

Using data for North Carolina public school students in grades 3 to 8, we examine achievement gaps between white students and students from other racial and ethnic groups. We focus on successive cohorts of students who stay in the state's public schools for all six years, and study both differences in means and in quantiles. Our results on achievement gaps between black and white students are consistent with those from other longitudinal studies: the gaps are sizable, are robust to controls for measures of socioeconomic status, and show no monotonic trend between 3rd and 8th grade. In contrast, both Hispanic and Asian students tend to gain on whites as they progress through these grades. Looking beyond simple mean differences, we find that the racial gaps in math between low-performing students have tended to shrink as students progress through school, while racial gaps between high-performing students have widened for black and American Indian students.

Teacher-Student Matching and the Assessment of Teacher Effectiveness

We use administrative data on North Carolina public schools to document the tendency for more highly qualified teachers to be matched with more advantaged students, and we measure the bias this pattern generates in estimates of the impacts of various teacher qualifications on student achievement. One of the strategies we use to minimize this bias is to restrict the analysis to schools that assign students to classrooms in a manner statistically indistinguishable from random assignment. Using data for 5th grade, we consistently find significant returns to teacher experience in both math and reading and to licensure test scores in math achievement. We also find that the returns in math are greater for socioeconomically advantaged students, a finding that may help explain why the observed form of teacher-student matching persists in equilibrium.