Summary statistics for pspp2010_180 dataset : by Jean Roth , jroth@nber.org , 12 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- npi1 | 0 npi2 | 0 paircount |124,844,963 338.0517 1551.422 11 1111761 benecount |124,844,963 45.4789 117.4159 11 107380 samedaycount |124,844,963 11.31701 116.2063 0 207942 -------------+--------------------------------------------------------- year |124,844,963 2010 0 2010 2010 days |124,844,963 180 0 180 180 begdate |124,844,963 18263 0 18263 18263 enddate |124,844,963 19175 0 19175 19175 by Jean Roth , jroth@nber.org , 12 Feb 2018