<title>Abstract</title> This paper serves as background information for the TRB workshop on stated preference modelling. The main argument of the paper is that the development of stated preference and choice models has witnessed increased complexity, which in turn has led to higher respondent burden. The paper...

<title>Abstract</title> This paper argues that certain choice problems in transportation research can be best conceptualized as problems of portfolio choice. It discusses how portfolio choice problems can be studied using discrete choice experiments, stated choice (conjoint) methods. Issues in the construction...