00395pab a2200133 454500008004000000100001900040245010900059260000900168300001400177362000800191650001300199700002000212773002900232180718b2010   xxu||||| |||| 00| 0 eng d  aGoldhaber, Dan  aImplicit measurement of teacher quality: using performance on the job to inform teacher tenure decisions  c2010  ap.250-55.  aMay  aTeachers  aHansen, Michael  aAmerican Economic Review