/usr/share/gretl/scripts/misc/oprobit.inp is in gretl-common 1.9.6-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | # Use Ray Fair's extra-marital affairs data, as reproduced
# by William Greene
open greene22_2
# display the definitions of the variables
labels
# The variable 'Z8' is the self-rating of marriage:
# we subtract one to give a base of zero, mark the resulting
# variable as discrete, examine its frequency distribution,
# then relate it to gender (Z1) and age in years (Z2)
genr rat = Z8 - 1
discrete rat
freq rat
# ordered probit
probit rat 0 Z1 Z2
probit rat 0 Z1 Z2 --robust
# ordered logit
logit rat 0 Z1 Z2
logit rat 0 Z1 Z2 --robust
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