<p>People choose not to come to Caltech for various reasons. One is that there are few options outside math, science, and engineering, so for someone on the fence about whether they want to go into one of these fields, a different school is a better fit. Other reasons include the relatively weaker humanities program and smaller student body.</p>
<p>Also, your MIT numbers are incorrect. This article puts their yield at 65%: [MIT</a> Admissions Cancels Waitlist For Third Year, Yield Reaches New High - The Tech](<a href=“http://tech.mit.edu/V125/N29/Class09.html]MIT”>http://tech.mit.edu/V125/N29/Class09.html).</p>