I am really new to Stata, so that my question might be trivial
I am using package cmp to estimate a bivariate model that goes as follows:
cmp(d_ln_jobs = d_layer) (d_layer = d_tariff), vce(robust) ind($cmp_cont $cmp_probit) nolr quietly difficult
d_layer is an ordered variable that assumes -4, -3, ... 4.
How could I obtain the marginal effect of d_tariff on both dependent variables, evaluated at d_tariff's median?
Here is what I've tried:
margins, dydx(d_tariff) at((median)) force
I don't think this is correct since, as an output, the entry related to dy/dx says 0, and at the header of the output it shows:
"Expression: linear prediction, predict()"
Does this last part mean that it would show predicted probabilities rather than marginal effects? Besides, shouldn't I get a value different from 0? In my mind, d_tariff would change d_layer, which would change d_ln_jobs? Why don't I get two values, one showing the marginal effect on d_layer and the other on d_ln_jobs?
