Summary statistics for pspp2015_30 dataset : by Jean Roth , jroth@nber.org , 11 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- npi1 | 0 npi2 | 0 paircount | 34,856,901 123.5873 371.8999 11 152179 benecount | 34,856,901 37.00096 78.89124 11 49165 samedaycount | 34,856,901 16.48196 109.7386 0 114369 -------------+--------------------------------------------------------- year | 34,856,901 2015 0 2015 2015 days | 34,856,901 30 0 30 30 begdate | 34,856,901 20089 0 20089 20089 enddate | 34,856,901 20332 0 20332 20332 by Jean Roth , jroth@nber.org , 11 Feb 2018