Summary statistics for a_c1_12 variable in snf_rollup2540_96_1998 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     a_c1_12 |      8,873    28701.09    87721.65     -17822    5945919

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