Summary statistics for indi2007q3 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 142282 5422729 28844.41 5286005 5530192 indi_drug_~q | 142282 1.01e+09 99155.32 1.01e+09 1.01e+09 indi_pt | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015