Summary statistics for pspp2011_90 dataset :

by Jean Roth , jroth@nber.org , 12 Feb 2018

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        npi1 |          0
        npi2 |          0
   paircount | 89,506,481    235.4515     944.361         11     707907
   benecount | 89,506,481    43.07951    105.7424         11      80239
samedaycount | 89,506,481    13.13048    116.3081          0     151703
-------------+---------------------------------------------------------
        year | 89,506,481        2011           0       2011       2011
        days | 89,506,481          90           0         90         90
     begdate | 89,506,481       18628           0      18628      18628
     enddate | 89,506,481       19084           0      19084      19084

by Jean Roth , jroth@nber.org , 12 Feb 2018