00309pab a2200121 454500008004000000100001900040245005000059260000900109300001500118362000800133650001100141773003500152180718b2006   xxu||||| |||| 00| 0 eng d  aMas, Alexandre  aPay, reference points, and police performance  c2006  ap.783-821.  aAug  aPolice  aQuarterly Journal of Economics