Using Stata 15.1, I was wondering how I test for equality of the coefficients for the marginal effects.

Example below.


use http://www.stata-press.com/data/r13/sysdsn1
mlogit insure age i.male i.nonwhite i.site
test [Indemnity]age = [Prepaid]age

margins, dydx(*) predict(outcome(Indemnity))
margins, dydx(*) predict(outcome(Prepaid))
How do I perform the equivalent test test [Indemnity]age = [Prepaid]age?