Predictions after mlogit

[Steven Spivack]

The margins command calculates predicted probabilities for each covariate across groups (outcome). For example, if you estimate a multinomial model with 3 choices the sum of the predicted probabilities for each covariate will equal one across outcome groups. This is equivalent to running crosstabs with the row option. However, is there an equivalent in margins of running crosstabs with the column option? In other words, is there an option for margins that calculates predicted probabilities that sum to one for each covariate within, as opposed to across, groups.

[FernandoRios]

Hi Steven
I think there is no command that does what you ask because it is not theoretically possible.
Perhaps you have something else in mind? could you come up with a working example on how would such type of marginal effect be estimated?

[Steven Spivack]

That was my fear. I did not think it was possible either but a collaborator is requesting this and I wanted to make sure before letting them know.