Summary statistics for nadacc20171213 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
ndcdescrip~n |          0
         ndc |          0
oldnadacpe~t |         58    112.2157    392.9169    1.33782   2634.289
newnadacpe~t |         58    115.7297    395.2749    2.85948   2620.021
classifica~g |          0
-------------+---------------------------------------------------------
percentcha~e |         58    43.76328    66.22252       -.54        172
percentcha~r |          0
primaryrea~n |          0
   startdate |         58       21159           0      21159      21159
     enddate |         58       21166           0      21166      21166
-------------+---------------------------------------------------------
effectived~e |         58    21161.59    5.591455      21146      21166
        year |         58        2017           0       2017       2017
       month |         58          12           0         12         12
         day |         58          13           0         13         13

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