<p>Actually, Princeton gets (sorry, ‘got’) a whopping 47% of its operating budget from endowment.</p>
<p>Harvard and Yale were closer to 1/3</p>
<p>I can’t speak for the other Ivies save for Penn, which got 9% of its operating budget from endowment. Like JHU it has funded buildings with debt lightly, as it is fortunate enough to be able to have a phenomenal medical system which attracts hundreds of millions of dollars in funding annually.</p>