Chapter 16 
Performing Choice Modeling
Using the Choice Platform
The Choice platform is designed for use in market research experiments, where the ultimate goal is to discover the preference structure of consumers. Then, this information is used to design products or services that have the attributes most desired by consumers.
Features provided in the Choice platform include:
• ability to use information about consumer traits as well as product attributes.
• integration of data from one, two, or three sources.
• ability to use the integrated profiler to understand, visualize, and optimize the response (utility) surface.
• provides subject-level scores for segmenting or clustering your data.
• uses a special default bias-corrected maximum likelihood estimator described by Firth (1993). This method has been shown to produce better estimates and tests than MLEs without bias correction. In addition, bias-corrected MLEs ameliorate separation problems that tend to occur in logistic-type models. Refer to Heinze and Schemper (2002) for a discussion of the separation problem in logistic regression.
The Choice platform is not appropriate to use for fitting models that involve:
• ranking or scoring.
• nested hierarchical choices. (PROC MDC in SAS/ETS can be used for such analysis.)
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