Summary statistics for indi2011q2 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 350475 7488433 58018.9 7215577 7692852 indi_drug_~q | 350475 1.02e+09 223852.3 1.02e+09 1.02e+09 indi_pt | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015