Technical Appendix to Air Demand in a Dynamic Competitive Context with the Automobile (2019) / Chapter Skim
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Pages 41-48
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From page 42... ...
42 Trip Quotas Each respondent was required to describe a recent medium- or long-distance trip by airplane or car to act as a reference trip for the SP experiments. To collect enough sample from multiple reference trip types, the research team set quotas for each combination of trip distance, trip purpose, and mode.
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44 FIGURE 6-2: SCREENSHOT OF LONG-DISTANCE TRIPS QUESTION FOR CHICAGO-AREA ORIGINS Following this section of the survey, respondents were assigned a trip distance, purpose, and mode where they had entered at least one round trip and asked to provide further details about their most recent trip in this category. Trip details included origin and destination, party size, trip duration, trip costs, and specific questions relating to air trips or car trips.
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45 FIGURE 6-3: SCREENSHOT OF AN EXAMPLE SP EXPERIMENT Respondents were then put through a battery of approximately 50 attitudinal questions in eight sets to understand general attitudes toward the various aspects of medium- and long-distance air and automobile travel. Respondents were asked to what extent they agreed or disagreed with each statement on a seven-point scale (Figure 6-4)
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46 FIGURE 6-4: SCREENSHOT OF ONE SET OF ATTITUDINAL QUESTIONS SURVEY ADMINISTRATION Pretest On February 17, 2017, the survey was pretested with a group of 100 respondents. RSG analyzed the pretest data and ran preliminary SP models to ensure everything was working as planned.
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47 6(C) FINAL DATASET The field effort resulted in a total of 4,223 valid responses, exceeding the goal of 4,000.
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48 or-over age category and another 21% between 55 and 64. The sample is 53% female (Table 6-6)
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