Summary statistics for s3_1_c23_7 variable in snf_rollup2540_96_2002 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
  s3_1_c23_7 |          1      500550           .     500550     500550

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