
60 Ordered Regression Models
There are several results that are consistent across the three models. The coefcients
for age and age-squared are signicant in each model. We will focus on these nonlinear
patterns in more detail in Figure3.1. Education and log income have signicant, positive
effects on health and the coefcients are constrained to remain constant across levels of
health. Using the logit link, we see that a standard deviation increase in education is asso-
ciated with a decrease in the odds of poorer health by a factor of 0.73 or 27%.
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Similarly, a
standard deviation increase in the log of family income is associated with a decr ...