X*n	is a vector of latent variables;
Xn	is a vector of explanatory variables;
δm	is a vector of constants;
γ	is a matrix of unknown parameters;
σn	is a vector of error terms;
Un	is a vector of utilities;
αi	is the alternative-specific constant;
βn	is a vector of parameters;
Γ	is a matrix of unknown parameters;
εn	is a vector of error terms;
In	is a vector of indicators of latent variables;
an	is a vector of constants;
λn	is a matrix of unknown parameters; and
υn	is a vector of error terms.