Frequencies for first 10,000 rows of typepay variable in namcs1996 dataset :

     expected type of payment for visit |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
No answer, both parts a and b were blan |        129        1.29        1.29
              Preferred Provider Option |      1,395       13.95       15.24
               Insured, fee-for-service |      3,904       39.04       54.28
                      HMO/Other prepaid |      2,382       23.82       78.10
                               Self-pay |        922        9.22       87.32
                              No charge |         75        0.75       88.07
                                  Other |        120        1.20       89.27
Type of payment unspec, but insurance c |      1,073       10.73      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016