One of the flashpoints in school choice debates is the performance of public schools pared to private. A while back a Department of Education study drew attention by claiming that, when certain socio-economic factors were controlled, there wasn’t much of a difference between achievement by public and private school students. Those findings are now under fire from Harvard researchers Paul Petersen and Elena Llaudet, who use the same data but a different method—and claim that the Department of Education’s method was flawed.

HT: John Hood at Phi Beta Cons.