Low Cost Private Schools in the Developing World Overall, there is good evidence that private school systems tend to create small but meaningful increases in achievement (e.g. here, here, here, here) and especially good evidence that they do so with large costs savings. The large costs savings suggest that with the right institutional structure, which might involve vouchers and nationally comparable testing, an entrepreneurial private sector could create very large gains. – See more at: http://marginalrevolution.com/marginalrevolution/2015/08/low-cost-private-schools-in-the-developing-world.html#sthash.0B8EJsWS.dpuf