Summary statistics for nadac20160106 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 | 23,827 9.639577 196.1952 .00168 16351.96 effective_~e | 23,827 20425.84 59.81726 20089 20459 pricing_unit | 0 -------------+--------------------------------------------------------- pharmacy_t~r | 0 otc | 0 explanatio~e | 0 classifica~g | 0 correspond~c | 1,353 3.982329 17.47797 .003 351.973 -------------+--------------------------------------------------------- asofdate | 23,827 20459 0 20459 20459 year | 23,827 2016 0 2016 2016 month | 23,827 1 0 1 1 day | 23,827 6 0 6 6 generic_dr~e | 0 -------------+--------------------------------------------------------- generic_dr~c | 1,353 20439.92 33.77552 20165 20818 by Jean Roth , jroth@nber.org , 10 Feb 2018