Summary statistics for a_c6_9 variable in snf_rollup2540_96_2000 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      a_c6_9 |      2,373   -2261.408    26638.47    -615443     271533

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