Chalfin, Aaron <br/><br/>
The Effect of police on crime :  New evidence from U.S. cities, 1960-2010 / 
Aaron Chalfin and Justin McCrary 
 - Cambridge  NBER  2013 
 - 74p 
 - NBER Working Paper ;  18815 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>NBERWP 18815<br/>E9447.pdf