Resumo

CIH DZUL, Imelda Rosana et al. Price transmission asymmetry in the west Mexican tomatoe market. Estud. soc [online]. 2013, vol.21, n.42, pp.113-132. ISSN 0188-4557.

The concept of price transmission was used to evaluate the vertical integration mechanism of agricultural market and its possible implications for the distribution of marketing margins among vertical market participants. The aim of this study is to quantify and characterize the vertical transmission of tomato prices in the market of Guadalajara, Jalisco, Mexico. To achieve this objective, an economic model of price transmission was used. It was estimated by ordinary least squares, because ADF test on price series reject the null hypothesis of non-stationarity. It was found that the price transmission between wholesale and consumer is asymmetric, which means that when the price that consumer pays increases, it proportionally increases more than when it decreases, in response to an increase or decrease of the same magnitude of wholesale price. The causality test showed that there is a bidirectional relationship from consumer to wholesale and a unidirectional consumer-producer and producer- wholesale relationship.

Palavras-chave : price asymmetry; co-integration; tomato; price transmission.

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