Mathematically, the PRUSH (PNM's make their selections immediately after their parties) makes more sense than SORUSH (PNM's get a list of invites and choose which to accept). In PRUSH with RFM, both the PNM's and the chapters have flexlists, so the right number of women end up at each chapter during each round. If a campus used RFM and SORUSH, they could end up with too few women, and couldn't go back and add via the flexlist.
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