Summary statistics for core dataset :

by Jean Roth , jroth@nber.org , 19 Apr 2019

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         npi |          0
      entity |  5,800,357    1.228899    .4201242          1          2
replacemen~i |          0
         ein |          0
    porgname |          0
-------------+---------------------------------------------------------
      plname |          0
      pfname |          0
      pmname |          0
 pnameprefix |          0
 pnamesuffix |          0
-------------+---------------------------------------------------------
 pcredential |          0
 porgnameoth |          0
porgnameot~e |          0
   plnameoth |          0
   pfnameoth |          0
-------------+---------------------------------------------------------
   pmnameoth |          0
pnameprefi~h |          0
pnamesuffi~h |          0
pcredentia~h |          0
  plnamecode |    287,335    1.853666    1.501149          1          5
-------------+---------------------------------------------------------
  pmailline1 |          0
  pmailline2 |          0
pmailcityn~e |          0
pmailstate~e |          0
    pmailzip |          0
-------------+---------------------------------------------------------
pmailcountry |          0
    pmailtel |          0
    pmailfax |          0
   plocline1 |          0
   plocline2 |          0
-------------+---------------------------------------------------------
ploccityname |          0
plocstaten~e |          0
     ploczip |          0
 ploccountry |          0
     ploctel |          0
-------------+---------------------------------------------------------
     plocfax |          0
penumdatestr |          0
   penumdate |  5,800,357    18635.79    1600.775      16579      21646
lastupdate~r |          0
  lastupdate |  5,800,357    19441.78    1476.497      17355      21647
-------------+---------------------------------------------------------
npideactre~n |          0
npideactda~r |          0
npideactdate |    150,799    19738.86    1394.431      16579      21647
npireactda~r |          0
npireactdate |      7,497    18589.38    1854.161      16580      21644
-------------+---------------------------------------------------------
     pgender |          0
     aolname |          0
     aofname |          0
     aomname |          0
     aotitle |          0
-------------+---------------------------------------------------------
    aotelnum |          0
    soleprop |          0
  orgsubpart |          0
parent_or~bn |          0
parent_or~in |          0
-------------+---------------------------------------------------------
aoname_pre~x |          0
aoname_suf~x |          0
aocredential |          0

by Jean Roth , jroth@nber.org , 19 Apr 2019