UPenn is Ivy, but it's freshwater.
It seems to be the case that only old profs do saltwater, so if a department has a lot of young people, it's most likely freshwater. The sad thing is, some (if not most) freshwater departments don't teach any saltwater stuff, but Keynesian macro has been around for so long, and there's so much knowledge to gain from it. If a PhD student was an undergrad econ major, he'd be fine. But if he wasn't, being in a freshwater department would be like not learning economics at all. I bet he wouldn't even be able to understand a New York Times article on business/economics.