This paper analyzes variation in the medium-term effects of the oversubscribed Boston Public Schools prekindergarten program. Prekindergarten gains persisted if kids applied to and won a seat in a higher-quality elementary school.
A Literature Review
Examining the scholarly literature published since a seminal review in 2000, this working paper discusses the principles that underlie project-based learning, how it has been used in K-12 settings, the challenges teachers have confronted in implementing it, and what is known about its effectiveness in improving students’ learning outcomes.
Using an alternative to classical statistics, this paper reanalyzes results from three published studies of interventions to increase employment and reduce welfare dependency. The analysis formally incorporates prior beliefs about the interventions, characterizing the results in terms of the distribution of possible effects, and generally confirms the earlier published findings.
An Analysis of the Interaction among Quality-of-Life Indicators from the New Communities Program Evaluation
This paper explores analytic methods that assess the rate at which changes in neighborhood quality of life occur. It looks at correlations among quality indicators over time and the effect of both neighborhood context and conditions beyond the neighborhood, like the Great Recession, identifying which indicators are predictors of others.
This paper provides practical guidance for researchers who are designing and analyzing studies that randomize schools — which comprise three levels of clustering (students in classrooms in schools) — to measure intervention effects on student academic outcomes when information on the middle level (classrooms) is missing.
Strategies for Interpreting and Reporting Intervention Effects on Subgroups
This revised paper examines strategies for interpreting and reporting estimates of intervention effects for subgroups of a study sample. Specifically, the paper considers: why and how subgroup findings are important for applied research, the importance of prespecifying subgroups before analyses are conducted, and the importance of using existing theory and prior research to distinguish between subgroups for which study findings are confirmatory, as opposed to exploratory.
After one year, CEO’s transitional jobs program generated a large but short-lived increase in employment for ex-prisoners. A subgroup of recently released prisoners showed positive effects on recidivism: They were less likely to have their parole revoked, to be convicted of a felony, and to be reincarcerated than the control group.
This paper illustrates how to design an experimental sample for measuring the effects of educational programs when whole schools are randomized to a program and control group. It addresses such issues as what number of schools should be randomized, how many students per school are needed, and what is the best mix of program and control schools.