7.4. Travel Example
Now let’s look at a more complicated application of the conditional logit model. In a survey of transportation usage between three Australian cities, 210 people were asked which of four options they used on their most recent trip: air, train, bus, or car (Hensher and Bradley 1993). They were also asked about certain characteristics of all four travel options, regardless of whether they used them. As in the previous example, a separate observation is constructed for each option for each person, giving a total of 840 observations. The variables are:
| ID | A unique identifier for each person |
| MODE | 1=air, 2=train, 3=bus, 4=car |
| CHOICE | 1=chose that mode, 0=didn’t choose |
| TIME | Terminal waiting time |
| COST | Total cost for all stages |
| TIME | Total time ... |
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