I only applied to Harvard MPA. I am now wondering if I should have applied to the MPP since I really want to go there. I am already enrolled at a partner business school so we are basically told to do the MPA instead of the MPP. And I definitelly want/need the flexibility of the MPA since I would only have 3 semesters there. It seems like the MPA program is much smaller and that it is mainly comprised of students from Wharton/Stanford/Sloan/Tuck, with just a handful of non-business school students who choose to do the MPA over the MPP because they have some other Masters degree already.