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Combining discrete and continuous mixing approaches to accommodate heterogeneity in price sensitivities in environmental choice analysis AgEcon
Campbell, Danny; Doherty, Edel; Hynes, Stephen; van Rensburg, Tom M..
Data from a discrete choice experiment aimed at eliciting the demand for recreational walking trails on farmland in the Republic of Ireland is used to explore the consequences of misspecifying the cost coefficient. To enable straightforward calculation of WTP from the distributions of the non-price coefficients, the price coefficient is typically held constant in mixed logit models. This implies that all respondents are equally price sensitive. In this paper we test the validity of this assumption. Our approach is based on a comparison and combination of discrete and continuous mixing approaches (i.e., a mixture of distributions) to uncover the unobserved heterogeneity in price sensitivities. Results from the analysis highlight that model fit and...
Tipo: Conference Paper or Presentation Palavras-chave: Discrete choice experiments; Discrete mixtures; Continuous mixtures; Mixtures of distributions; Price sensitivities; Farmland recreation; Willing to pay space; Environmental Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/91723
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The effect of using labelled alternatives in stated choice experiments: an exploration focusing on farmland walking trails in Ireland AgEcon
Doherty, Edel; Campbell, Danny; Hynes, Stephen; van Rensburg, Tom M..
Discrete choice experiment data aimed at eliciting the demand for recreational walking trails on farmland in Ireland is used to explore whether some respondents reach their choices solely on the basis of the alternative’s label. To investigate this type of processing strategy, the paper exploits a discrete mixtures approach which encompasses random parameters for the attributes. We find evidence that respondents employ different processing strategies for different alternatives and differences in processing emerge between rural and urban based respondents. Results highlight that model fit and policy conclusions are sensitive to assumptions related to processing strategies among respondents
Tipo: Conference Paper or Presentation Palavras-chave: Discrete choice experiments; Processing strategies; Discrete mixtures; Rural and urban comparison; Outdoor recreation; Welfare estimates; Land Economics/Use.
Ano: 2011 URL: http://purl.umn.edu/108792
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Demand for improved food safety and quality: a cross-regional comparison AgEcon
Doherty, Edel; Campbell, Danny.
This paper explores the demand for improved safety and quality for meat products among consumers in two regions using a discrete choice experiment methodology. The study takes account of preferences from consumers across Great Britain and the Republic of Ireland. The features explored in the choice experiment include food safety, traceability, animal health and welfare, region of origin and price. The results suggest a large difference between willingness to pay and implicit ranking of attributes across regions. Meat products that come from ‘Ireland’ are most highly demanded among the features for Irish consumers, whereas consumers based in Great Britain value enhanced testing and animal health and welfare standards highest. Furthermore, a high correlation...
Tipo: Conference Paper or Presentation Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2011 URL: http://purl.umn.edu/108791
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Choosing ‘buy none’ in food choice analysis: the role of utility balance AgEcon
Campbell, Danny; Doherty, Edel; Gibson, Vikki.
Stated choice analysis is now a widely used and accepted methodology for exploring food choice. In stated choice experiments respondents are asked to make a choice between two or more alternatives, one of which typically takes the form of a ‘buy none’ option. It is widely recognised that respondents often perceive this option differently from the other alternatives and various reasons for this have been offered. Nevertheless, the role that utility balance among the experimentally designed options plays on the propensity of respondent’s choosing ‘buy none’ has largely been overlooked. Using a non-linear representation of utility we show that the ‘buy none’ choices are sensitive to utility balance. We further show how accommodating this provides an...
Tipo: Conference Paper or Presentation Palavras-chave: Discrete choice experiments; Utility balance; Status-quo bias; Food choice; Consumer/Household Economics.
Ano: 2011 URL: http://purl.umn.edu/108951
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