This study tracked all of Florida's 2000–2001 and 2001–2002 high school seniors and found that students who participated in dual enrollment classes on college campuses were 12 percent more likely to go to college and 7 percent more likely to earn a bachelor's degree than similar students who...

In the first rigorous study of the impacts of Expeditionary Learning (EL) model schools, Mathematica found that EL middle school students perform better in reading and math than their counterparts in other public schools.

Nonexperimental methods, such as regression modeling or statistical matching, produce unbiased estimates if the underlying assumptions hold, but these assumptions are usually not testable. Most studies testing nonexperimental designs find that they fail to produce unbiased estimates, but these...