Summary statistics for a_c2_4 variable in snf_rollup2540_96_2001 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      a_c2_4 |     12,335    634472.6     1898599   -2986285   1.70e+08

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