effecush: Auxiliary function for the log-likelihood estimation of CUSH models with covariates
Description
Compute the opposite of the loglikelihood function for CUSH models
with covariates to explain the shelter effect.
Usage
effecush(paravec, esternocush, shelter, m)
Arguments
paravec
Vector of the initial parameters estimates
esternocush
Matrix binding together the vector of ordinal data and the matrix XX of explanatory
variables whose first column is a column of ones needed to consider an intercept term
shelter
Category corresponding to the shelter choice
m
Number of ordinal categories
Details
It is called as an argument for "optim" within CUSH function (when no covariate is included)
as the function to minimize.