Comparing public and private high schools using three SAT data sets

Proponents of private schooling claim that private high schools, on the average, more effectively promote measured academic achievement than public high schools. They have also argued that private high schools increase high school completion rates and improve college enrollment rates among high school graduates. Their antagonists, typically, hold that there is little or no difference between public and private high schools with respect to any of these outcomes. We address two of these school effectivenes issues by applying multiple-regression analysis to two SAT data sets for Florida and a national SAT data set. We ask whether there are differences between public and private high schools in promoting achievement as measured by the high-profile SAT verbal and math tests. At the same time, we are asking, at least implicity, if either public or private high schools provide an SAT soore advantage in promoting college enrollments. Our analysis finds a consistent advantage for public high schools with respect to SAT math attainment. For high schools generally, however, it seems clear that school effects outweigh the impact of socially ascribed traits, such as race, ethnicity, gender, and social class.