Survey year
age in years
dummy variable, =1 for female, =0 otherwise
=1 if white, =2 if black, =3 of other, =4 if hispanic
dummy variable, =1 if have any health insurance, =0 otherwise
dummy variable, =1 if have private health insurance, =0 otherwise
dummy variable, =1 if have employer-provided health insurance, =0 otherwise
dummy variable, =1 if have medicaid, =0 otherwise