Jonathan Ladd

Every semester, @GUPolitics brings to campus a group of political practitioners as fellows, to give our students first hand access to the political process. This fall, we have another outstanding group joining us! Take a look! youtube.com/watch?v=FOwhxDpD…

Yes, it's hard to explain. I actually like Achen's (1986) explanation, as applied to basically this set-up (the relationship between undergrad grades and grad school grades). But he's an unusually clear writer.

Achen (1986) on why you can't use the relationship between undergad grades and grad school grades as evidence of the effect of the former on the latter. The same logic applies to admissions test scores and grades among admitted students.