Summary statistics for ndchcpcsasp dataset : by Jean Roth , jroth@nber.org , 5 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- hcpcs | 0 shortdescr~n | 0 labelername | 0 ndc | 0 ndcdash | 0 -------------+--------------------------------------------------------- drugname | 0 hcpcsdosage | 0 pkgsize | 4,223 48.71147 140.6058 .05 3000 pkgqty | 4,223 10.27895 34.89834 1 1440 billunits | 4,223 67.3776 262.0362 .1 8000 -------------+--------------------------------------------------------- billunitspkg | 4,223 231.9893 679.819 .1 12000 by Jean Roth , jroth@nber.org , 5 Feb 2018