Summary statistics for b_1_c18_13 variable in snf_rollup2540_96_1996 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
  b_1_c18_13 |          1      233516           .     233516     233516

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