A calibrated choice experiment method

Author:

Chenarides Lauren1,Grebitus Carola1,Lusk Jayson L2ORCID,Printezis Iryna3

Affiliation:

1. Morrison School of Agribusiness, Arizona State University, Mesa, AZ, USA

2. Department of Agricultural Economics, Purdue University, West Lafayette, IN, USA

3. Department of Supply Chain Management, Arizona State University, Mesa, AZ, USA

Abstract

Abstract Although choice experiments (CEs) have emerged as the most popular stated preference method in applied economics, the method is not free from biases related to order and presentation effects. This paper introduces a new preference elicitation method referred to as a calibrated CE (CCE), and we explore the ability of the new method to alleviate starting-point bias. The new approach utilises the distribution of preferences from a prior CE to provide real-time feedback to respondents about our best guess of their willingness-to-pay (WTP) for food attributes and allows respondents to adjust and calibrate their values. The analysis utilises data collected in 2017 in two US cities, Phoenix and Detroit, on consumer preferences for local and organic tomatoes sold through supermarkets, urban farms and farmers’ markets to establish a prior preference distribution. We re-conducted the survey in May 2020 and implemented the CCE. Conventional analysis of the 2020 CE data shows that WTP is strongly influenced by a starting point: the higher the initial price respondents encountered, the higher the absolute value of their WTP. Despite this bias, we show that when respondents have the opportunity to update their WTP when presented with the best guess, the resulting calibrated WTP is much less influenced by the random starting point.

Publisher

Oxford University Press (OUP)

Subject

Economics and Econometrics,Agricultural and Biological Sciences (miscellaneous)

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