There's a lot in this report (97 page PDF) and it should be read in full. The experience of private institutions varies a lot from country to country - they may increase access in a country like Brazil while doing nothing to increase in a country like Australia. And there's this, which stood out to me: "There is very limited evidence to suggest that the presence of the private sector, in the countries studied, has improved the quality of provision or driven down prices in either the public or private sectors. Indeed, relative to the public sector, the quality of provision in the private sector is often found wanting, while tuition fees usually are higher." As University World News reports, the system requires "better regulation to reduce the 'often considerable' risk to students, according to a six-country study."
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