Inferred vs Stated Attribute Non-Attendance in Choice Experiments: A Study of Doctors' Prescription Behaviour

Arne Risa Hole, Julie Riise Kolstad, Dorte Gyrd-Hansen

Abstract

It is increasingly recognised that respondents to choice experiments
employ heuristics such as attribute non-attendance (ANA) to simplify
the choice tasks. This paper develops an econometric model which
incorporates preference heterogeneity among respondents with different
attribute processing strategies and allows the ANA probabilities
to depend on the respondents' stated non-attendance. We fi…nd evidence
that stated ANA is a useful indicator of the prevalence of nonattendance in
the data. Contrary to previous papers in the literature we …find that willingness
to pay estimates derived from models which account for ANA are similar to
the standard logit estimates.