Geographical indications (GIs) provide a strong differentiation tool for firms. Whether this statement is confirmed at aggregate level in terms of market independence of different GIs is not tested yet. The purpose of this paper is to provide demand estimates and elasticities (own‐price and substitution) in order to test this hypothesis and verify the differentiation effect of GIs at aggregate level.
The analysis consists of the application of a quadratic almost ideal demand on a four equation system. Estimates are obtained through an iterated version of a generalized method of moments, which corrects for endogeneity determined by expenditure and prices in case of promotional activities.
Estimates prove the existence of a differentiation effect of GIs in terms of magnitude of elasticities and substitution effects. GIs corresponding to higher quality generate lower price sensitiveness and product substitution, contrarily to wine without GI. Controlled origin denomination (DOC) wine demand results are price sensitive and they substitute for wines of different GI. Controlled and guaranteed origin denomination (DOCG) is the most profitable GI. In fact, because of its inelastic demand, DOCG price could be potentially increased, to a certain extent, without having significant effects on volumes consumed.
Foreign wine should also be included in the demand system in order to understand the whole Italian wine market. Data concern retail level demand. The whole market, including hotels, restaurants and catering, should be included to offer a wider set of implications.
Marketers and producers could use the information provided by the estimates in order to forecast Italian wine demand. Elasticities and substitution effect provide them with a precise measure of consumers' price sensitiveness, which would be beneficial for their pricing strategies.
The paper provides, for the first time, estimates of a demand system relative to GI differentiated Italian wine.
Stasi, A., Nardone, G., Viscecchia, R. and Seccia, A. (2011), "Italian wine demand and differentiation effect of geographical indications", International Journal of Wine Business Research, Vol. 23 No. 1, pp. 49-61. https://doi.org/10.1108/17511061111121407Download as .RIS
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