Unfortunately, to my knowledge, SIPA does not publish detailed admissions statistics (like most MPP/MPA programs), so it's difficult to gauge relative selectivity. I can post my own stats if that would be helpful.
All I know is that SIPA is consistently ranked as part of the top 5 policy/international relations graduate schools, and has strong post-grad career placement.
Good luck everyone! I heard Early Action decisions for the MPA program are scheduled to be released late December/early January. Can anyone confirm this?