gecubpqs function

Main function for CUB models with covariates for all the components

Function to estimate and validate a CUB model for given ordinal responses, with covariates for explaining all the components and the shelter effect.

gecubpqs(ordinal,Y,W,X,shelter,theta0,maxiter,toler)

Arguments

• ordinal: Vector of ordinal responses
• Y: Matrix of selected covariates for explaining the uncertainty component, not including intercept
• W: Matrix of selected covariates for explaining the feeling component, not including intercept
• X: Matrix of selected covariates for explaining the shelter effect, not including intercept
• shelter: Category corresponding to the shelter choice
• theta0: Starting values for parameters explaining the shelter effect
• maxiter: Maximum number of iterations allowed for running the optimization algorithm
• toler: Fixed error tolerance for final estimates

Returns

An object of the class "CUB"

References

Piccolo D. and D'Elia A. (2008), A new approach for modelling consumers' preferences, Food Quality and Preference, 18 , 247--259

Iannario M. and Piccolo D. (2010), A new statistical model for the analysis of customer satisfaction, #' Quality Technology and Quantity management, 7 (2) 149--168

Iannario M. and Piccolo D. (2012), CUB models: Statistical methods and empirical evidence, in: Kenett R. S. and Salini S. (eds.), Modern Analysis of Customer Surveys: with applications using R, J. Wiley and Sons, Chichester, 231--258.