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Published in: Empirical Economics 1/2014

01-08-2014

Consumers’ preferences for a local food product: a real choice experiment

Author: Azucena Gracia

Published in: Empirical Economics | Issue 1/2014

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Abstract

This paper analyses consumers’ preferences for a local food in Spain and assesses their willingness to pay (WTP) using a real choice experiment to mitigate possible hypothetical bias. In particular, preferences for fresh lamb meat were investigated and two attributes evaluated, “locally grown” and the type of lamb meat. Data came from an experiment conducted in Spain during 2009. An error component random Parameter model with correlated errors was used to estimate the effect of the attributes on consumers’ utility and derive their WTP. Results suggest that consumers positively value both attributes and are willing to pay a premium of 9 % price increase for the “locally grown” lamb meat (“Ojinegra from Teruel”) and 13 % price increase for the “Ternasco” lamb meat. If we assume a market where only “Ternasco” lamb meat without indication of the local origin is sold, and then a new “Ternasco” lamb is introduced in the market with the “Ojinegra from Teruel” label, this new local lamb meat would capture 18 % of the market if the package is assumed to be sold at 3.5 \(\hbox {C}\!\!\!\!\!=\) and a 10 % market share if the package is assumed to be sold at 4 \(\hbox {C}\!\!\!\!\!=\).

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Appendix
Available only for authorised users
Footnotes
1
According to the European Committee of the Regions (1996), the concept of “local food” has been used to define natural goods or services produced or provided by different enterprises in rural areas with an established socio-economic identity. “Local food” clearly refers to a geographic production area that is circumscribed by boundaries and in close proximity to the consumer (Hand and Martinez 2010).
 
2
Although those consumers’ perceptions cannot be true and even be against some basic economic principles (see Lusk and Norwood 2011 for a discussion).
 
3
“Black eyes” because the animals have black colour around their eyes.
 
4
Other breeds could not be adapted in this area due to the difficult climatic and geographic conditions. The “Ojinegra from Teruel” breed has a high capacity to run on top of mountains in semi-extensive farms, maximizing the use of the natural resources of the area. In addition, “Ojinegra from Teruel” sheep are not fed with supplements. Moreover, “Ojinegra from Teruel” is a breed included in the Official Catalogue of Livestock Breeds in Spain and the regional government is promoting the expansion of this breed to improve the rural development of this area and keep its population.
 
5
Zaragoza is the largest town in the Aragon region located at around 140 km from the producing area.
 
6
As Lusk et al. (2008) point out, most applications of incentive compatible preference methods have involved experimental auctions, with more than 100 academic studies. However, up to date such auction methods have not gained the widespread popularity among marketing academics and professionals as has the different conjoint analysis.
 
7
They used a within subject non-hypothetical choice experiment.
 
8
The field work and the data recording were done by a private marketing research company. Researchers developed a protocol with the experiment instructions for the interviewers who were personally instructed by the researchers on how to conduct the experiment.
 
9
We questioned whether interviewees always, almost always, occasionally, hardly ever and never buy the food for the household. Consumers who indicated never were not selected.
 
10
The percentage of participants who choose the non-buy option is small and lies between 2 % for the choice set 3 and 21 % for the choice set 4.
 
11
Socioeconomic and demographic interaction terms were assumed to be fixed in the estimation.
 
12
Estimation for this model is available upon request.
 
13
Off-diagonal elements of the matrix represent the amount of cross-parameter correlations previously confounded with the standard deviation parameters of the model (Hensher et al. 2005).
 
14
The same applies for the OJITER variable. If we estimate the model defined by \(U_{njt} =\mathrm{{ASC}}+\beta _1 \mathrm{{PRICE}}_{njt} +\beta _2 \mathrm{{TERNASCO}}_{njt} +\beta _3 \mathrm{{OJITER}}_{njt} +\varepsilon _{njt} \), the amount of variance directly attributable to the OJITER variable is 0.036 and not 0.28. The difference value is the cross-product correlation with the TERNASCO random parameter estimate. The diagonal Cholesky element for the variable OJITER (0.036) is not statistically different from zero, this implies that the variable OJITER is not heterogeneous around the mean of the estimated parameter. In other words, there is evidence that consumers’ preferences for the “locally grown” label (OJITER) are indeed homogenous after allowing cross-correlation across attribute parameters.
 
15
The unconditional probability is given by \(P_n (\theta )=\int {S_n (\beta _n )f(\beta _{n{}} {}} \vert \theta )~\mathrm{{d}}\beta _n.\)
 
16
Nowadays all the lamb meat is sold without this label and as mentioned in the text, 84 % of slaughtered lambs in Aragon correspond to “Ternasco”, then, our assumption is close to the current market situation. The value of the final lamb meat production in Aragon in 2009 accounts for 86.9 millions Euros.
 
17
As the “Ojinegra from Teruel” producers.
 
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Metadata
Title
Consumers’ preferences for a local food product: a real choice experiment
Author
Azucena Gracia
Publication date
01-08-2014
Publisher
Springer Berlin Heidelberg
Published in
Empirical Economics / Issue 1/2014
Print ISSN: 0377-7332
Electronic ISSN: 1435-8921
DOI
https://doi.org/10.1007/s00181-013-0738-x

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