Correlaciones en series temporales de precios de pollo, soja y maíz

Autores/as

DOI:

https://doi.org/10.33448/rsd-v10i4.14019

Palabras clave:

Commodities; Detrended Cross Correlation Analysis; Detrended Cross Correlation Coefficient; Crisis alimentaria.

Resumen

La evolución del mercado agrícola brasileño ha cambiado el proceso de producción, exportación y consumo de productos alimenticios. Con esto, se han desarrollado nuevos estudios sobre la relación entre el mercado de alimentos y otros mercados, buscando explicar el vínculo entre los precios de commodities agrícolas y no agrícolas. Con el objetivo de contribuir a este estudio, fueron investigadas aquí las correlaciones intrínsecas de largo plazo entre los mercados de alimentos brasileños, utilizando técnicas de Econofísica. Así, se analizaron las series diarias de precios y retorno de precios de la carne de pollo, soja y maíz registradas entre 02/02/2004 y 16/06/2017 por el Centro de Estudos Avançados em Economia Aplicada / Escola Superior de Agricultura Luiz de Queiroz / Universidade de São Paulo - CEPEA/ESALQ/USP. Las correlaciones se analizaron utilizando los métodos Detrended Fluctuation Analysis (DFA) y Detrended Cross Correlation Analysis (DCCA), para calcular el Detrended Cross Correlation Coefficient (DCCA Coefficient), que sirve para cuantificar las correlaciones cruzadas a largo plazo entre series temporales no estacionarias. Los resultados apuntan a la ausencia de correlaciones cruzadas para escalas temporales de hasta 30 días y, para escalas mayores, indican correlaciones más fuertes entre los precios de pollo y maíz que entre los precios de pollo y de soja. Después de la crisis alimentaria de 2008, entretanto, las correlaciones entre las series diarias de retorno de precios del pollo y del maíz disminuyeron, mientras que, entre las de pollo y soja, aumentaron en las escalas menores y disminuyeron en las escalas mayores.

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Publicado

06/04/2021

Cómo citar

PESSOA, R. V. S.; BARRETO, I. D. de C.; ARAÚJO, L. da S.; MOREIRA, G. R.; STOSIC, T.; STOSIC, B. Correlaciones en series temporales de precios de pollo, soja y maíz. Research, Society and Development, [S. l.], v. 10, n. 4, p. e20610414019, 2021. DOI: 10.33448/rsd-v10i4.14019. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/14019. Acesso em: 23 nov. 2024.

Número

Sección

Ciencias Exactas y de la Tierra