Summary statistics for cpscert2016 dataset :

by Jean Roth , jroth@nber.org , 16 Nov 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      qstnum |          0
    pulineno |  1,999,381    2.106114    1.390065         -1         16
       month |  1,999,429    6.483579    3.454894          1         12
     hryear4 |  1,999,429        2016           0       2016       2016
     pecert1 |  1,999,381    .7906437    1.393271         -1          2
-------------+---------------------------------------------------------
     pecert2 |  1,999,381    -.764113    .6714353         -1          2
     pecert3 |  1,999,381   -.7882715    .6539782         -1          2
     pxcert1 |  1,088,600    17.23756    8.766248         -1         43
     pxcert2 |    467,839     6.96104      10.369         -1         43
     pxcert3 |    444,973    6.089127    10.09655         -1         43

by Jean Roth , jroth@nber.org , 16 Nov 2017