Summary statistics for nadac20170809 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 | 24,745 9.43136 210.0242 .00132 18280.92 effective_~e | 24,745 20999.53 56.95049 20655 21040 pricing_unit | 0 -------------+--------------------------------------------------------- pharmacy_t~r | 0 otc | 0 explanatio~e | 0 classifica~g | 0 correspond~c | 1,202 3.570057 14.89914 .00293 245.615 -------------+--------------------------------------------------------- asofdate | 24,745 21040 0 21040 21040 year | 24,745 2017 0 2017 2017 month | 24,745 8 0 8 8 day | 24,745 9 0 9 9 generic_dr~e | 0 -------------+--------------------------------------------------------- generic_dr~c | 1,202 21010.32 39.47286 20655 21033 by Jean Roth , jroth@nber.org , 10 Feb 2018