<p>When Princeton, Yale and Stanford all adopted ED in 1996-7, they each experienced a more or less uniform 5% yield rise.</p>
<p>True but it seems that all of them adopting ED at the same time increased yield rates more than if only one did because all of those schools have admit pools that overlap alot. When Princeton moved to ED it would trap students that would boost its yield but it would also remove people from the Yale and Stanford pools that would probably pick Princeton over Y/S since they were willing to apply to Princeton ED. This would obviously happen to all three schools but in this case Harvard, Yale, Stanford and MIT are all already SCEA. If Princeton moves to EA, I don't see how it would change yield rates much. Especially after we saw Yale and Stanford benefit greatly from moving to SCEA, I think a move to SCEA would do Princeton some good.</p>
<p>MIT is Open EA not SCEA. At this point in time there are only 3 schools SCEA, Harvard, Stanford and Yale. From a student's perspective Open EA is the best policy because you are free to apply to other schools at the same time and find out early if you got in. However, it really does not do that much for the schools.</p>
<p>Yea, I meant EA/SCEA when I said SCEA</p>
<p>It is a gradual increase... something like 20 or less a year.</p>