Frequencies for urspa variable in impact2006 dataset :

   Urban or |
      Rural |
designation |
   based on |
    payment |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,486       38.86       38.86
     OURBAN |      1,206       31.54       70.40
      RURAL |      1,132       29.60      100.00
------------+-----------------------------------
      Total |      3,824      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016