<p>The admission rate at Wharton is lower. That’s the main sense in which it is “harder”. But this can get pretty misleading, as the inference made by srrinath and statements like “The calibre of Wharton students is on par with HYP” show. Wharton, CAS, HYP all have way more qualified applicants than there are places for. In addition, the size of the admitted class varies from place to place. In addition, the profile that business schools look for is more focused. All you have is an admissions rate. From the admissions rate, you can’t really make any inferences on the quality of the particular students who got accepted, using the admissions rate, or the yield, as your metric. To see the absurdity of this reasoning, consider the admissions rate of the Curtis Institute of Music, which is in the single digits. Any statements like “Curtis is on par with Harvard”, “Curtis is harder to get into than X”, “the calibre of Curtis students is the same as HYP” is just meaningless, because what the schools look for is very different.</p>