Summary statistics for count2540_96 dataset : by Jean Roth , jroth@nber.org , 17 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- fyear | 18 2003.5 5.338539 1995 2012 rptcount | 18 11492.72 4933.305 1 14631 alphacount | 18 1118095 524286.9 114 1700107 nmrccount | 18 7296298 3154116 721 1.02e+07 rollupcount | 18 1378165 587762.5 129 1847499 by Jean Roth , jroth@nber.org , 17 Feb 2018