Summary statistics for nadacc20170816 dataset :

by Jean Roth , jroth@nber.org , 10 Feb 2018

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
ndcdescrip~n |          0
         ndc |          0
oldnadacpe~t |         30    3.553053    12.01418     .04796   65.50287
newnadacpe~t |         30    3.818809    12.58092     .07166   68.77802
classifica~g |          0
-------------+---------------------------------------------------------
percentcha~e |         30    40.06367    19.52433       1.61       60.2
percentcha~r |          0
primaryrea~n |          0
   startdate |         30       21040           0      21040      21040
     enddate |         30       21047           0      21047      21047
-------------+---------------------------------------------------------
effectived~e |         30    21046.77    1.278019      21040      21047
        year |         30        2017           0       2017       2017
       month |         30           8           0          8          8
         day |         30          16           0         16         16

by Jean Roth , jroth@nber.org , 10 Feb 2018