Summary statistics for chemtypelookup dataset : by Jean Roth , jroth@nber.org , 15 Aug 2017 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- chemicalty~d | 10 7.6 6.07728 1 17 chemicalty~e | 10 5.5 3.02765 1 10 chemicalty~n | 0 tecode | 0 by Jean Roth , jroth@nber.org , 15 Aug 2017