While publicly sponsored school voucher programs are primarily intended to impact the lives of those who take advantage of the service, they may also have consequences for the larger community. In particular, voucher programs could affect the performance of public schools by altering their resources and incentives; they could alter the demographics of both public and private schools; they could provide new opportunities for students to attend private schools or simply supplement the behavior of students who would have attended private schools regardless of the program. Regardless of the impact of such programs on the few students who are able to use vouchers, it is important to understand the impact of such programs on the larger community before we can judge the overall wisdom of school choice policies.
Winters, Marcus A. and Greene, Jay P., "Second Year Evaluation of the Systematic Effects of the DC Voucher Program" (2007). School Choice Demonstration Project. 22.