Summary statistics for cowbo19ages dataset :

by Jean Roth , jroth@nber.org , 2 May 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |    248,256    1993.501    13.70254       1969       2015
          st |          0
      stfips |          0
      county |          0
    registry |    248,256          99           0         99         99
-------------+---------------------------------------------------------
        race |    248,256    1.873997    .8761576          1          3
    hispanic |    248,256           9           0          9          9
         sex |    248,256    1.493205    .4999548          1          2
         age |    248,256    8.470724    5.259511          0         18
         pop |    248,256    703.3036    2405.256          1      33624

by Jean Roth , jroth@nber.org , 2 May 2017