I've wondered this, too. Most people I've discussed this with said that with undergrad, unless you're attending an Ivy League, the school doesn't matter as much as your achievements, grades, etc. However, no one really has answers when it comes to grad schools. Personally, I'd like to think that the school doesn't matter as much as your degree, grades, achievements, etc. It may depend on whether the schools you're looking at for M.P.P have preferred school they choose candidates from.