Summary statistics for a_c2_4 variable in snf_rollup2540_96_1997 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      a_c2_4 |     11,915    467411.8    498218.2    -252740   1.22e+07

by Jean Roth , jroth@nber.org , 17 Feb 2018