Realism and Adaptation in Designing Hypothetical travel Choice Concepts
For external validity, SP experiments need to present choices that are realistic for the respondents. The use of portable computers in interviewing has many advantages.
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Alternative Demand Models and their Elasticity Estimates
- T.H. Oum
- May 1989
- Vol. 23
- No. 2
- Page 163
Alternative Demand Models and their Elasticity Estimates
- T.H. Oum
- May 1989
- Vol. 23
- No. 2
- Page 163
Choice of functional form for the demand (forecasting) model is very important for empirical research. Of the five models examined, the translog demand system with theoretical constraints imposed upon the parameters performs the best. But further investigation is needed.
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