Summary statistics for indi2008q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 178365 5634999 31293.6 5476957 5771298 indi_drug_~q | 178365 1.01e+09 109112.8 1.01e+09 1.01e+09 indi_pt | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015