effecush function

Auxiliary function for the log-likelihood estimation of CUSH models with covariates

Compute the opposite of the loglikelihood function for CUSH models with covariates to explain the shelter effect.

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.