Summary statistics for nadacc20170412 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
ndcdescrip~n |          0
         ndc |          0
oldnadacpe~t |         73    167.8987    577.0986     .22899    3633.82
newnadacpe~t |         73     178.657    615.8919     .24045   3884.554
classifica~g |          0
-------------+---------------------------------------------------------
percentcha~e |         73    7.719315    2.668514        .46         15
percentcha~r |          0
primaryrea~n |          0
   startdate |         73       20914           0      20914      20914
     enddate |         73       20921           0      20921      20921
-------------+---------------------------------------------------------
        year |         73        2017           0       2017       2017
       month |         73           4           0          4          4
         day |         73          12           0         12         12

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