Frequencies for urspa variable in impact2003 dataset :

   Urban or |
      Rural |
designation |
   based on |
    payment |
       CBSA |      Freq.     Percent        Cum.
------------+-----------------------------------
     LURBAN |      1,611       37.27       37.27
     OURBAN |      1,078       24.94       62.22
      RURAL |      1,633       37.78      100.00
------------+-----------------------------------
      Total |      4,322      100.00

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