Background. Randomized Controlled Trials are the “gold-standard” for estimating causal impacts of education programs. They are not always feasible, however, and may not generalize to the population of interest. Generally, researchers cannot measure selection bias in quasi-experimental...

School voucher programs (a.k.a. opportunity scholarships) are scholarship programs - frequently government funded - that pay for students to attend private schools of their choice. Many private school vouchers programs have been initiated around the world with the goal of increasing the academic...