Summary statistics for pspp2013_90 dataset : by Jean Roth , jroth@nber.org , 11 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- npi1 | 0 npi2 | 0 paircount | 92,004,979 226.7033 951.3905 11 726284 benecount | 92,004,979 42.12284 104.4951 11 93023 samedaycount | 92,004,979 12.87187 130.905 0 293588 -------------+--------------------------------------------------------- year | 92,004,979 2013 0 2013 2013 days | 92,004,979 90 0 90 90 begdate | 92,004,979 19359 0 19359 19359 enddate | 92,004,979 19814 0 19814 19814 by Jean Roth , jroth@nber.org , 11 Feb 2018