<p>Duke’s yield is higher than that of UChicago, Northwestern, Cal Tech, Johns Hopkins, Vanderbilt, and Wash U among others. Yield is an easily manipulated statistic and 45% is not surprisingly low. Duke does not keep track of or consider demonstrated interest in its admissions decisions like some schools do (number of visits, phone calls, etc.). Doing so would undoubtedly increase the yield, but perhaps yield a slightly less accomplished student body. Duke also doesn’t fill more than 45% of its class with ED applicants like UPenn and Columbia do.</p>