effeihgcov: Auxiliary function for the log-likelihood estimation of IHG models with covariates
Description
Compute the opposite of the log-likelihood function for an IHG model with covariates
for the preference parameter.
Usage
effeihgcov(nu, ordinal, U, m)
Arguments
nu
Vector of the starting values for the parameters to be estimated, with length equal to
NCOL(U)+1 to account for an intercept term (first entry of $nu$)
ordinal
Vector of ordinal responses
U
Matrix of the explanatory variables for the preference parameter $\theta$
m
Number of ordinal categories
Details
It is called as an argument for "optim" within IHG function (with covariates)
as the function to minimize.