Summary statistics for national_downloadable_file dataset : by Jean Roth , jroth@nber.org , 28 Feb 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- npi | 0 ind_pac_id | 0 ind_enrl_id | 0 lastname | 0 firstname | 0 -------------+--------------------------------------------------------- middlename | 0 suffix | 0 gender | 0 credential | 0 med_sch | 0 -------------+--------------------------------------------------------- grd_yr | 2,101,258 1995.253 12.25066 1773 2016 pri_spec | 0 sec_spec_1 | 0 sec_spec_2 | 0 sec_spec_3 | 0 -------------+--------------------------------------------------------- sec_spec_4 | 0 sec_spec_all | 0 org_nm | 0 organizati~e | 0 org_pac_id | 0 -------------+--------------------------------------------------------- num_org_mem | 2,014,847 451.6403 787.2543 1 5927 adr_ln_1 | 0 adr_ln_2 | 0 ln_2_sprs | 0 city | 0 -------------+--------------------------------------------------------- state | 0 zipcode | 0 hosp_afl_1 | 0 hosp_afl_l~1 | 0 hosp_afl_2 | 0 -------------+--------------------------------------------------------- hosp_afl_l~2 | 0 hosp_afl_3 | 0 hosp_afl_l~3 | 0 hosp_afl_4 | 0 hosp_afl_l~4 | 0 -------------+--------------------------------------------------------- hosp_afl_5 | 0 hosp_afl_l~5 | 0 assgn | 0 erx | 0 pqrs | 0 -------------+--------------------------------------------------------- ehr | 0 receivedpqrs | 0 participat~s | 0 by Jean Roth , jroth@nber.org , 28 Feb 2018