Summary statistics for indi2007q2 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 136475 5331710 27102.84 5198124 5463292 indi_drug_~q | 136475 1.01e+09 101444.5 1.01e+09 1.01e+09 indi_pt | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015