Summary statistics for indi2006q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 130498 4921708 29096.21 4793437 5015804 indi_drug_~q | 130498 1.01e+09 110733.2 1.01e+09 1.01e+09 indi_pt | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015