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Econometric ridge regression models of risk-sensitive sunflower yield / Modelos economométricos de regressão de rendimento de girassol sensível ao risco
Slozhenkina, M. I; Gorlov, I. F; Kholodov, O. A; Kholodova, M. A; Shakhbazova, O. P; Mosolova, D. A; Knyazhechenko, O. A.
  • Slozhenkina, M. I; Volga Region Research Institute of Manufacture and Processing of Meat-and-Milk Production. Volgograd. RU
  • Gorlov, I. F; Volga Region Research Institute of Manufacture and Processing of Meat-and-Milk Production. Volgograd. RU
  • Kholodov, O. A; Rostov State University of Economics. Rostov-on-Don. RU
  • Kholodova, M. A; Federal Rostov Agrarian Scientific Center. Rostov-on-Don. RU
  • Shakhbazova, O. P; Don State Agrarian University. Rostov-on-Don. RU
  • Mosolova, D. A; Volga Region Research Institute of Manufacture and Processing of Meat-and-Milk Production. Volgograd. RU
  • Knyazhechenko, O. A; Volga Region Research Institute of Manufacture and Processing of Meat-and-Milk Production. Volgograd. RU
Arq. bras. med. vet. zootec. (Online) ; 73(5): 1159-1170, Sept.-Oct. 2021. tab, ilus
Article in English | LILACS, VETINDEX | ID: biblio-1345261
ABSTRACT
The article considers econometric ridge regression models of the risk-sensitive sunflower yield on the example of an export-oriented agricultural crop. In particular, we have proved that despite the functional mulcollinearity of the predictors in the sunflower yield model with respect to risk caused by the algorithm peculiarities of the hierarchy analysis methods, the ridge regression procedure makes it possible to obtain its complete specification and provide biased but stable estimates of the forecast parameters in the case of uncertain input variables. It has been substantiated that the rational value of the displacement parameters is expedient to be established using a graphical interpretation of the ridge wake as the border of fast and slow fluctuations in the estimates of the ridge regression coefficients. Econometric models were calculated using SPSS Statistics, Mathcad and FAR-AREA 4.0 software. The empirical basis for forecast calculations was the assessment of trends in sunflower production in all categories of farms in the Rostov region of Russia for the period of 2008-2018. The calculation results of econometric models made it possible to develop three author's scenarios for the sunflower production in the region, namely, inertial, moderate, and optimistic ones that consider the export-oriented strategy of the agro-industrial complex.(AU)
RESUMO
O artigo considera modelos econométricos de regressão de rendimento de girassol sensível ao risco sobre o exemplo de uma cultura agrícola orientada para a exportação. Em particular, provamos que apesar da multicolinearidade funcional dos preditores no modelo de rendimento de girassol com relação ao risco causado pelas peculiaridades dos algoritmos dos métodos de análise hierárquica, o procedimento de regressão de cristas permite obter sua especificação completa e fornecer estimativas tendenciosas, mas estáveis dos parâmetros de previsão no caso de variáveis de entrada incertas. Foi comprovado que o valor racional dos parâmetros de deslocamento é conveniente de ser estabelecido usando uma interpretação gráfica da esteira da crista como fronteira das flutuações rápidas e lentas nas estimativas dos coeficientes de regressão da crista. Os modelos econométricos foram calculados usando o software SPSS Statistics, Mathcad e FAR-AREA 4.0. A base empírica para os cálculos de previsão foi a avaliação das tendências da produção de girassol em todas as categorias de fazendas na região de Rostov na Rússia para o período de 2008-2018. Os resultados dos cálculos dos modelos econométricos permitiram desenvolver três cenários de autor para a produção de girassol na região, a saber, os cenários inercial, moderado e otimista que consideram a estratégia orientada à exportação do complexo agroindustrial.(AU)
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Models, Econometric / Crops, Agricultural / Crop Production / Forecasting / Helianthus Type of study: Diagnostic study / Etiology study / Health economic evaluation / Prognostic study / Risk factors Language: English Journal: Arq. bras. med. vet. zootec. (Online) Year: 2021 Type: Article Institution/Affiliation country: Don State Agrarian University/RU / Federal Rostov Agrarian Scientific Center/RU / Rostov State University of Economics/RU / Volga Region Research Institute of Manufacture and Processing of Meat-and-Milk Production/RU

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Full text: Available Index: LILACS (Americas) Main subject: Models, Econometric / Crops, Agricultural / Crop Production / Forecasting / Helianthus Type of study: Diagnostic study / Etiology study / Health economic evaluation / Prognostic study / Risk factors Language: English Journal: Arq. bras. med. vet. zootec. (Online) Year: 2021 Type: Article Institution/Affiliation country: Don State Agrarian University/RU / Federal Rostov Agrarian Scientific Center/RU / Rostov State University of Economics/RU / Volga Region Research Institute of Manufacture and Processing of Meat-and-Milk Production/RU