Summary statistics for nadac20170308 dataset : by Jean Roth , jroth@nber.org , 10 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- ndcdescrip~n | 0 ndc | 0 nadac_per_~t | 24,294 10.31481 219.1207 .00132 18280.92 effective_~e | 24,294 20858.45 45.88273 20510 20886 pricing_unit | 0 -------------+--------------------------------------------------------- pharmacy_t~r | 0 otc | 0 explanatio~e | 0 classifica~g | 0 correspond~c | 1,204 4.465031 20.1561 .00299 336.424 -------------+--------------------------------------------------------- asofdate | 24,294 20886 0 20886 20886 year | 24,294 2017 0 2017 2017 month | 24,294 3 0 3 3 day | 24,294 8 0 8 8 generic_dr~e | 0 -------------+--------------------------------------------------------- generic_dr~c | 1,204 20864.95 32.05704 20564 20886 by Jean Roth , jroth@nber.org , 10 Feb 2018