<p>Why? I figure if they had them, they'd be pretty prestigious institutions.</p>
<p>Princeton has always been the Ivy League school with the biggest focus on the undergraduate experience (alongside Dartmouth College, which is also a university despite its choice to keep the name). Yes, any school with the “Princeton stamp” would be prestigious, but Princeton doesn’t need to expand its graduate studies to professional schools in order to maintain its reputation for excellence.</p>
<p>Yale and Brown would beg to disagree, but whatever…</p>