Are prep school adjusted upward in the college admissions process to compensate for tough standards?

There is no evidence to support the claim that prep school grades are adjusted upward in the college admissions process to compensate for tough standards. In fact, a study by the National Bureau of Economic Research found that prep school students are actually less likely to be admitted to top colleges than students from public schools. This is because prep school students tend to have higher test scores and GPAs, but they are also more likely to come from wealthy families and have other advantages that make them more competitive in the admissions process.