The Market for Higher Education: Economic Analyses of College Choice , Returns , and State Aid Policy A thesis Present I find suggestive evidence, however, that her estimates, from a sample of public school students, are upward biased by selection into private schools. Moreover, an investigation of the sampling variability of Hoxby s estimates leads to the conclusion that her standard errors are understated, and that even her own point estimates of the competitive effect are not significantly different from zero
