Summary statistics for nadac20160210 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 | 23,992 9.986793 198.931 .00164 16351.96 effective_~e | 23,992 20457.89 51.7667 20109 20494 pricing_unit | 0 -------------+--------------------------------------------------------- pharmacy_t~r | 0 otc | 0 explanatio~e | 0 classifica~g | 0 correspond~c | 1,323 3.982121 17.77873 .00294 351.973 -------------+--------------------------------------------------------- asofdate | 23,992 20494 0 20494 20494 year | 23,992 2016 0 2016 2016 month | 23,992 2 0 2 2 day | 23,992 10 0 10 10 generic_dr~e | 0 -------------+--------------------------------------------------------- generic_dr~c | 1,323 20466.55 34.13568 20165 20494 by Jean Roth , jroth@nber.org , 10 Feb 2018