When Arizona State University announced in 2015 that it would offer a freshman year's worth of credit-bearing "massive open online courses" (MOOCs) for a fraction of the cost of its regular online and in-person classes, the news was met with both excitement and alarm. Education reformers proclaimed the move groundbreaking, saying it…

Most studies focus on the effects of charter attendance on short-term student achievement (test scores), using either data sets that follow students over time or random assignment via school admission lotteries to control for differences between students in charter and traditional public schools. Beyond measuring achievement effects, however,…