Hello,

I am performing an rank-ordered logit analysis using the rologit Stata command. In post-estimation I am calculating two things: predict double value, xb; and, predict double sigma, stdp. I understand how stata calculates xb (predicted value of option j to individual i). But I do not understand how Stata calculates the stdp value. Can someone help me figure that out? (I would like some equation such as epsilon_ji= ?)

Best,
Bernardo de Moura