Summary statistics for s3_1_c18_8 variable in snf_rollup2540_96_1999 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
  s3_1_c18_8 |          1          53           .         53         53

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