FUNCTIONAL FORMS OF THE UTILITY INTEGRATION RULE IN TRADE-OFF ANALYSIS

This paper investigates the sesitivity of the N.Y. State Department of Transportation's trade-off model (an attitude scaling procuedure) to the utility integration rule incorporated in the model. Three utility integration rules are tested: a multiplicative model, an additive model, and an exponential additive model. The sensitivity of the procedure is evaluated at two points: first using the utilities estimated by the different forms, then by means of a market simulation. Utilities were estimated for the multiplicative and additive models only. Systematic differences were found but they are very small. The market simulation was done using all three models in conjunction with either a voting share or a Luce preference share model. Expectedly, no differences were found under the voting share model, while again systematic though small differences were found under the preference share model. Overall, there are no significant empirical differences between the results arrived at under the three utility integration rules. Nevertheless, the exponential additive model is the preferred model, in the context of this procedure, because it requires only interval-scale data. /Author/

  • Supplemental Notes:
    • This report was prepared in part with the financial assistance of the U.S. Department of Transportation.
  • Corporate Authors:

    New York State Department of Transportation

    Planning Division, State Campus, Building 4
    Albany, NY  USA  12232
  • Authors:
    • Koeppel, KWP
  • Publication Date: 1977-8

Media Info

  • Features: References; Tables;
  • Pagination: 69 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00172866
  • Record Type: Publication
  • Report/Paper Numbers: Research Rpt. 122
  • Files: TRIS, STATEDOT
  • Created Date: Apr 12 1981 12:00AM