Summary statistics for npi_medicarexw dataset : by Jean Roth , jroth@nber.org , 19 Apr 2019 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- npi | 0 seq | 0 othpid | 0 othpidty | 0 othpidst | 0 -------------+--------------------------------------------------------- othpidiss | 0 by Jean Roth , jroth@nber.org , 19 Apr 2019