simple_partworth_utility: Multinomial logit partworth utilities

In Iannacks/SP.Survey: SP survey

Multinomial logit partworth utilities

Description

It provides partworth utilities obtained from a simple multinomial logit model based on a Stated preference survey

Usage

partworth_utility_basic(coefficients, data, nalts, optout, attribute_type)

Arguments

coefficients	A numeric vector containing multinomial logit coefficients
data	The SP dataset obtained from a SP Survey containing attributes, alternatives and responses columns. Otherwise you can insert the dataset file path
nalts	The number of alternatives per choice set in the experimental design matrix without considering the optout option if presents.
optout	A logical vector that assumes the value TRUE if the optout option is present, FALSE otherwise.In this case the optout option can be considered a no choice option as well as a status quo option (with always the same attributes levels)
attribute_type	A character vector indicating if each attribute must be considered quantitative ("C") or qualitative ("NC")

Details

It provides partworth utilities obtained from a simple multinomial logit model based on a SP survey. In particular,it takes as input the coefficients of the multinomial logit model of the function SP_mlogit_basic.In the dataset, attributes columns must stay before the other columns.Furthermore, alternatives column must be called "alt" while responses "resp".

Author(s)

Gabriele Iannaccone

References

Federov, V.V. (1972). Theory of optimal experiments. Academic Press, New York.

Wheeler, R.E. (2004). AlgDesign. The R project for statistical computing. (http://www.r-project.org).

Croissant, Y. (2012). Estimation of multinomial logit models in R: The mlogit Packages. R package version 0.2-2. URL: http://cran. r-project. org/web/packages/mlogit/vignettes/mlogit. pdf.

See Also

optFederov, optBlock, dcm.design.cand, mlogit

Examples

 #multinomial logit coefficients estimation
 z<-SP_mlogit_basic(dataset=retailers_freight,attribute_type = c("NC","C","C"))
#partworth utilities
partworth_utility_basic(coefficients=z$coefficients,data=data,nalts=2,optout=TRUE,attribute_type=c("NC","C","C"))

Iannacks/SP.Survey documentation built on May 18, 2023, 11:23 a.m.