A colleague of mine is looking for a clarifying answer regarding SP data
coding:
During a stated preferences survey, different possibilities of responses
are offered to respondents with regard to the characteristics of a new
mode (i.e. a new light rail).
Hereafter some possibilities offered :
"I will :
[1] Certainly choose my current mode
[2] Probably choose my current mode
[3] Probably choose the new mode (as described in the survey)
[4] Certainly choose the new mode (idem)
[5] I don't know"
Question :
Are there (from state-of-practice or state-of-the-art) weights usually applied
to these responses, from [1] to [5] (e.g. if x% of people respond "I will
certainly choose the new mode" what is the weight to use in the model
for "Yes" : 100% of these responses, 90%, 80% ?). Which arguments can
be used to choose one kind of weighting rather than another one.
Thank you for your help.
---------------
Charles RAUX,
Laboratoire d'Economie des Transports
CNRS-Université Lumière Lyon 2-ENTPE
email : [log in to unmask]
http://www.ish-lyon.cnrs.fr/let
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