Dear Professionals,

I am working on developing transport mode choice models, I used Multinomial Logit Model, and the factors that I used were travel time (TT) and travel cost (TC). The software gives me a base outcome! I want to know the values of the coefficients of the base outcome (I don not want a reference outcome), can you help me?
I know for categorical variables, the base outcome is used, but my variables are continuous variable.

Many papers used RStudio and the results were not with base outcome. It gives the coefficients based on the following functions:
Alt (1) = C + B * TT + B * TC
Alt (2) = C + B * TT + B * TC
Alt (3) = B * TT + B * TC

I want to use Stata to find the coefficients based on the previous functions, please advice me?.
Note, I use Stata 16

I appreciate your help
Jamil