Summary statistics for nda2segments dataset :

by Jean Roth , jroth@nber.org , 20 Feb 2018

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         ndc |          0
 labelercode |          0
 productcode |          0
 packagesize |          0
   firstyear |    177,759    1999.183    8.901943       1991       2017
-------------+---------------------------------------------------------
    lastyear |    177,759    2005.393    9.549792       1991       2017

by Jean Roth , jroth@nber.org , 20 Feb 2018