The Arrow index of a fuzzy choice function C is a measure of the degree to which C satisfies the Fuzzy Arrow Axiom, a fuzzy version of the classical Arrow Axiom. The main result of this paper shows that A(C) characterizes the degree to which C is full rational. We also obtain a method for...

This paper defines a well-behaved fuzzy order and finds a simple functional representation for the fuzzy preferences. It includes the existing utility theory for exact preferences (no fuzziness) as a special case. It is a simple and intuitive extension of the utility theory under uncertainty,...

The present study investigates how the framing of information on the environmental impact of vehicles affects consumers' preferences for identical improvements in car quality. In online choice experiments, the effects of two metrics (fuel consumption vs. CO2 emissions) and three scales of one...

In stated choice (SC) data inconsistent and lexicographic choice behavior is often observed. It is sometimes recommended to remove data with these characteristics from the analysis. In this paper we reconsider this recommendation. In our data many respondents have inconsistent choice patterns,...

Designing efficient environmental policies requires knowledge about households’ preference parameters for their intertemporal decisions. By conducting an original Internet-based survey using Japanese participants (n=2,906) and a follow-up survey (n=1,407), we examine how people evaluate...

How does a choice experiment (CE) model derived under standard preference axioms perform for respondents with incomplete preferences? Using simulated data, we show how such miss-specification results in unnecessary noise and bias in welfare estimates, and can be avoided. -- Choice experiment ;...