Summary statistics for nadacc20161123 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
ndcdescrip~n |          0
         ndc |          0
oldnadacpe~t |     20,597    1.862241    29.49507     .00245   3345.678
newnadacpe~t |     20,597    1.812013     29.6391     .00244   3416.781
classifica~g |          0
-------------+---------------------------------------------------------
percentcha~e |     20,597   -3.671528    8.480254     -46.24      93.99
percentcha~r |          0
primaryrea~n |          0
   startdate |          0
     enddate |          0
-------------+---------------------------------------------------------
        year |     20,597        2016           0       2016       2016
       month |     20,597          11           0         11         11
         day |     20,597          23           0         23         23

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