Summary statistics for pspp2015_60 dataset : by Jean Roth , jroth@nber.org , 11 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- npi1 | 0 npi2 | 0 paircount | 49,335,361 159.6402 550.9972 11 314880 benecount | 49,335,361 37.54229 83.30714 11 52971 samedaycount | 49,335,361 13.27583 102.6729 0 125761 -------------+--------------------------------------------------------- year | 49,335,361 2015 0 2015 2015 days | 49,335,361 60 0 60 60 begdate | 49,335,361 20089 0 20089 20089 enddate | 49,335,361 20362 0 20362 20362 by Jean Roth , jroth@nber.org , 11 Feb 2018