Summary statistics for indi2010q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 257208 6593357 40049.15 6383990 6710720 indi_drug_~q | 257208 1.01e+09 154474.1 1.01e+09 1.01e+09 indi_pt | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015