Transmission and influence of volume of public stocks on the price of rice in Brazil/Transmissao e a influencia do volume dos estoques publicos sobre o preco do arroz no Brasil

This study examined the mechanism of prices from major rice producing states in Brazil (Rio Grande do Sul, Mato Grosso and Santa Catarina), as endogenous variables, and volume of public stocks in Brazil, as exogenous variables for the period July 2004 until December 2010. The analysis includes the u...

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Veröffentlicht in:Ciência rural 2013-03, Vol.43 (3), p.559
Hauptverfasser: dos Santos, Elisandra, Wolff, Laion, Souzan, Adriano Mendonca
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Wolff, Laion
Souzan, Adriano Mendonca
description This study examined the mechanism of prices from major rice producing states in Brazil (Rio Grande do Sul, Mato Grosso and Santa Catarina), as endogenous variables, and volume of public stocks in Brazil, as exogenous variables for the period July 2004 until December 2010. The analysis includes the use of VAR-VEC methodology to identify the number of lags used and check for co-integration among variables through the test of Johansen Co-integration. We tested the existence of causality between variables by the method of Granger causality. We applied the variance decomposition of forecast error and impulse-response function with Cholesky decomposition to analyze the relationship between prices and volume of the states in public stocks. With the proposed methodology, one can observe that the price of rice in the state of Rio Grande do Sul to the price in the state of Santa Catarina and the volume stored in stockpiles and is influenced by the price of rice in the state of Mato Grosso. Key words: price of rice, stocks public autoregressive models with error correction, Granger causality. Este trabalho analisou o mecanismo de transmissao dos precos dos principais estados produtores de arroz no Brasil (Rio Grande do Sul, Mato Grosso e Santa Catarina), como variaveis endogenas, e volume dos estoques publicos no Brasil, como variavel exogena, para o periodo de julho de 2004 ate dezembro de 2010. A analise compreende o uso da metodologia VAR-VEC para identificar o numero de defasagens utilizadas e verificar se existem co-integracoes entre as variaveis, por meio do Teste de Co-integracao de Johansen. Testou-se a existencia de causalidade entre as series pelo metodo de causalidade de Granger. Aplicou-se a decomposicao da variancia do erro de previsao e a funcao impulso-resposta com decomposicao de Cholesky para analisar a relacao entre os precos dos estados e volume em estoques publicos. Com a aplicacao da metodologia proposta, pode-se observar que o preco do arroz no estado do Rio Grande do Sul influencia no preco no estado de Santa Catarina e no volume armazenado em estoques publicos e e influenciado pelo preco do arroz no estado do Mato Grosso. Palavras-chave: transmissao de precos, estoque publico, modelos de co-integracao de Johansen, modelos autorregressivos com correcao de erros, causalidade de Granger.
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The analysis includes the use of VAR-VEC methodology to identify the number of lags used and check for co-integration among variables through the test of Johansen Co-integration. We tested the existence of causality between variables by the method of Granger causality. We applied the variance decomposition of forecast error and impulse-response function with Cholesky decomposition to analyze the relationship between prices and volume of the states in public stocks. With the proposed methodology, one can observe that the price of rice in the state of Rio Grande do Sul to the price in the state of Santa Catarina and the volume stored in stockpiles and is influenced by the price of rice in the state of Mato Grosso. Key words: price of rice, stocks public autoregressive models with error correction, Granger causality. Este trabalho analisou o mecanismo de transmissao dos precos dos principais estados produtores de arroz no Brasil (Rio Grande do Sul, Mato Grosso e Santa Catarina), como variaveis endogenas, e volume dos estoques publicos no Brasil, como variavel exogena, para o periodo de julho de 2004 ate dezembro de 2010. A analise compreende o uso da metodologia VAR-VEC para identificar o numero de defasagens utilizadas e verificar se existem co-integracoes entre as variaveis, por meio do Teste de Co-integracao de Johansen. Testou-se a existencia de causalidade entre as series pelo metodo de causalidade de Granger. Aplicou-se a decomposicao da variancia do erro de previsao e a funcao impulso-resposta com decomposicao de Cholesky para analisar a relacao entre os precos dos estados e volume em estoques publicos. Com a aplicacao da metodologia proposta, pode-se observar que o preco do arroz no estado do Rio Grande do Sul influencia no preco no estado de Santa Catarina e no volume armazenado em estoques publicos e e influenciado pelo preco do arroz no estado do Mato Grosso. 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Este trabalho analisou o mecanismo de transmissao dos precos dos principais estados produtores de arroz no Brasil (Rio Grande do Sul, Mato Grosso e Santa Catarina), como variaveis endogenas, e volume dos estoques publicos no Brasil, como variavel exogena, para o periodo de julho de 2004 ate dezembro de 2010. A analise compreende o uso da metodologia VAR-VEC para identificar o numero de defasagens utilizadas e verificar se existem co-integracoes entre as variaveis, por meio do Teste de Co-integracao de Johansen. Testou-se a existencia de causalidade entre as series pelo metodo de causalidade de Granger. Aplicou-se a decomposicao da variancia do erro de previsao e a funcao impulso-resposta com decomposicao de Cholesky para analisar a relacao entre os precos dos estados e volume em estoques publicos. 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Value-added resellers
title Transmission and influence of volume of public stocks on the price of rice in Brazil/Transmissao e a influencia do volume dos estoques publicos sobre o preco do arroz no Brasil
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