DANA GOLDSTEIN

New York Times

Some private schools are raising tuition, and others are able to enroll more students as publicly financed voucher programs begin to reshape education across the country.

But the biggest beneficiaries of the new programs so far may be families whose children were already attending private schools, according to a new study.

The authors of the study, Douglas N. Harris and Gabriel Olivier, both economists at Tulane University, found that many students who did use vouchers to move from public to private education had enrolled in small religious schools with a median tuition of $7,000.

Spending taxpayer dollars on private schooling upends several core traditions of American public education, Harris argued, including public governance and the separation of chur

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