00437pab a2200133 454500008004000000100002300040245012500063260000900188300001500197362001100212650001300223700002100236773004600257180718b2013   xxu||||| |||| 00| 0 eng d  aWinters, Marcus A.  aWould a value-added system of retention improve the distribution of teacher quality? A simulation of alternative policie  c2013  ap.634-654.  aSummer  aTeachers  aCowen, Joshua M.  aJournal of Policy Analysis and Management