Logarithm (usually the natural logarithm) of its value. Logarithmic transformationâconversion of a variable to the That can be varied independently of the values of other Independent variableâterm in a model that can take values Some external factor or attribute of the process being mod-Įled that is believed to influence or has been shown to in-įluence the outcome of the process being modeled. Vailing conditions under which the choice was made.ĭummy variableâvariable that can only take the value zeroĮnplanementsânumber of passengers boarding aircraft at anĮxplanatory variableâindependent variable describing The characteristics of that individual or group and the pre. Made by an individual (or group of individuals) in terms of Specific mode in a mode choice model (or indeed a vari-Īble in any model) that can assume any appropriate value.ĭependent variableâterm in a model the values for whichĪre predicted by the model based on the values of the in-ĭeplanementsânumber of passengers getting off aircraft atĭisaggregate choice modelâmodel explaining the choice (typically a nested choice model) that represents the com-īined effect of several discrete sub-choices.Ĭontinuous variableâvariable in the utility function for a Interact with the independent variables to predict the valueĬomposite alternativeâan alternative in a choice model Sion maker or a measure of the situation faced by that de-Ĭision maker that influences the decision that is made.Ĭoefficientâterms in a model that assume fixed values and That reflects the attributes of the mode that are not accountedįor by the other variables in the utility function.Ĭausal variableâfactor that is believed to influence the out-Ĭome of some process, such as a characteristic of a deci. Utility function for a specific mode in a mode choice model Ployees, or others from an airport to their home or otherĪlternative-specific constant (ASC)âconstant term in the Ployees, or others to an airport from their home or otherĪirport egress tripâtravel by air passengers, airport em. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.Īir partyâgroup of air passengers traveling together.Īirport access tripâtravel by air passengers, airport em. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book.
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