00305pab a2200121 454500008004000000100002200040245004400062260000900106300001400115362000800129650001500137773003100152180718b2004   xxu||||| |||| 00| 0 eng d  aRappaport, Jordan  aWhy are population flows so persistent?  c2004  ap.554-80.  aNov  aPopulation  aJournal of Urban Economics