Summary statistics for pspp2009_180 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        npi1 |          0
        npi2 |          0
   paircount |119,270,681    344.4617    1545.529         11     893618
   benecount |119,270,681    45.86468    118.3486         11     104150
samedaycount |119,270,681    11.51982    117.7398          0     213337
-------------+---------------------------------------------------------
        year |119,270,681        2009           0       2009       2009
        days |119,270,681         180           0        180        180
     begdate |119,270,681       17898           0      17898      17898
     enddate |119,270,681       18444           0      18444      18444

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