Interdependência dos preços do milho no sul brasileiro

This article aims to verify the relationship between the prices of the maize in the states of Parana, Rio Grande do Sul and Santa Catarina in order to test the validity of the Law of One Price at those markets over the October, 2002 to March, 2009 period. Monthly data were extracted from the Center of Advanced Studies for Applied Economy (CEPEA) of ESALQ / USP. The employed methods understand the tests for unitary root and Johansen´s co-integration, impulse-response function, decomposition of the variance of the forecasting error and estimate of the vector error correction model (VEC). The results showed that the Law of One Price was not perfectly verified for the regional maize markets analyzed, when restrictions were imposed in the coefficient of relationship of long period.