Summary statistics for ful20181 dataset : by Jean Roth , jroth@nber.org , 8 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- productgroup | 17,644 2956.365 2235.673 1 11482 ingredient | 0 strength | 0 dosage | 0 route | 0 -------------+--------------------------------------------------------- mdrunittype | 0 weightedav~s | 0 acaful | 17,644 1.360414 4.009901 .00342 66.15901 packagesize | 17,644 240.9444 673.7162 1 28000 ndc | 0 -------------+--------------------------------------------------------- arated | 0 multiplier~o | 0 year | 17,644 2018 0 2018 2018 month | 17,644 1 0 1 1 by Jean Roth , jroth@nber.org , 8 Feb 2018