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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An?lise econ?mica em sistema de confinamento, forma??o de pre?os da arroba do boi e suas vari?veis de influ?ncia

Pereira, K?rito Augusto 05 May 2017 (has links)
Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-01-05T22:37:51Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) karito_augusto_pereira.pdf: 1249521 bytes, checksum: cdda0a4a0744b3f144e3b2940cf79ec5 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-01-19T17:01:13Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) karito_augusto_pereira.pdf: 1249521 bytes, checksum: cdda0a4a0744b3f144e3b2940cf79ec5 (MD5) / Made available in DSpace on 2018-01-19T17:01:13Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) karito_augusto_pereira.pdf: 1249521 bytes, checksum: cdda0a4a0744b3f144e3b2940cf79ec5 (MD5) Previous issue date: 2017 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Objetivou-se estudar o resultado econ?mico na opera??o de confinamento de bovinos de tr?s grupos gen?ticos (Nelore, Anelorado e Mesti?o Leiteiro) em fun??o do ?gio no pre?o de compra do boi a ser confinado. Bem como, avaliar a forma??o do pre?o da arroba do boi terminado e as vari?veis que ? influenciam. Para o estudo do resultado econ?mico em fun??o dos diferentes grupos gen?ticos e do sobrepre?o na compra da arroba do boi magro, utilizou-se dados de 57.589 animais divididos em 709 lotes oriundos dos ciclos de opera??o de mar?o de 2014 a dezembro de 2016. Os lotes foram considerados repeti??es e a margem bruta por animal foi considerada como o resultado econ?mico. Os dados de cada lote, ?gio (rela??o entre o pre?o de compra e o pre?o venda da arroba ? PC@/PV@) e, margem bruta (MB = REC ? COE) foram submetidos ? an?lise de regress?o e assim obteve-se os modelos matem?ticos para cada grupo gen?tico. Ap?s a elabora??o de testes de signific?ncia a 5%, adotou-se modelos lineares simples para todos os grupos em estudo. Para verificar a igualdade ou n?o dos tr?s modelos de regress?o gerados utilizou-se o teste de identidade de modelos. Constatou-se que o custo da arroba produzida a partir de animais Nelore durante o confinamento foi menor do que de animais Anelorados e Mesti?os Leiteiros. Tamb?m, verificou-se, que n?o se deve agrupar dados de animais Nelore e Mesti?os Leiteiros num mesmo modelo para estimar margem bruta em fun??o do pre?o de ?gio de compra e, que independente do grupo gen?tico, o ?gio na compra do boi magro deve ser uma vari?vel alvo, sendo que animais mais eficientes acomodam um maior sobrepre?o da arroba comprada. Para o estudo sobre forma??o do pre?o da arroba do boi terminado, os dados das vari?veis (pre?o do boi, bezerro, frango, su?no, milho e soja) foram advindos de cota??es mensais extra?das de uma amostra n?o probabil?stica e intencional de mar?o de 2006 a dezembro de 2016, do indicador ESALQ/BM&FBOVESPA, deflacionadas. Efetuou-se an?lises de normalidade, heterocedasticidade e estacionariedade. Utilizou-se um modelo da classe ARIMA na forma??o do pre?o da arroba do boi gordo. As vari?veis foram analisadas a partir da regress?o linear m?ltipla, al?m do teste de correla??o. Os resultados obtidos, mostraram que, desde o in?cio de per?odo em an?lise, o pre?o nominal e real apresentaram tend?ncia a crescimento ao longo dos anos at? a data base. Ressaltando a n?o normalidade dos erros dos res?duos. Assim como a presen?a de estacion?riedade das series em an?lise. O pre?o da arroba do boi gordo se apresentou sens?vel principalmente ao pre?o defasado, ilustrando que, o pre?o no per?odo anterior ao atual exerce influ?ncia decisiva na forma??o dos pre?os. Assim como as vari?veis pre?os do bezerro e do milho, tiverem influ?ncia na forma??o do pre?o da arroba do boi, estas n?o foram superiores ao pre?o defasado da pr?pria arroba. Fato ? que, ao longo do per?odo analisado a carne bovina tornou-se mais cara para o consumidor final, devido ao aumento generalizado dos pre?os (infla??o). / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The objective of this study was to study the economic result in the confinement of cattle from three genetic groups (Nelore, Anelorado and Mesti?o Leiteiro) as a function of the goodwill in the purchase price of the ox to be confined. As well as, to evaluate the formation of the price of the finished ox arroba and the variables that influence it. For the study of the economic result according to the different genetic groups and the overprice in the purchase of the arroba of the lean bovine, data of 57,589 animals divided in 709 lots were obtained from the operating cycles from March 2014 to December 2016. The lots Were considered repetitions and the gross margin per animal was considered as the economic result. The data of each batch of goodwill (relation between the purchase price and the sale price of the PC @ / PV @) and gross margin (MB = REC - COE) were submitted to the regression analysis and thus obtained from the mathematical models For each genetic group. After the development of 5% significance tests, simple linear models were adopted for all groups under study. To verify the equality of the three regression models generated, the model identity test was used. It was found that the cost of the arroba produced from Nellore animals during confinement was lower than that of Anelorados and Mesti?os Leiteiros animals, that Nelore and Mesti?os Leiteiros data should not be grouped together in the same model to estimate gross margin as a function of Price of goodwill and that, independent of the genetic group, goodwill on the purchase of lean cattle should be a target variable, with more efficient animals accommodating a higher price of purchased arroba. For the study on the formation of the price of the finished beef arroba, the variables data (price of beef, calf, chicken, pork, corn and soy) were derived from monthly quotations extracted from a non-probabilistic and intentional sample from March 2006 to December, 2016, of the ESALQ / BM & FBOVESPA indicator, deflated. Analyzes of normality, heteroskedasticity and stationarity were carried out. A model of the ARIMA class was used in the formation of the arroba arroba price. The variables were analyzed from the multiple linear regression, in addition to the correlation test. The results obtained showed that since the beginning of the period under analysis, the nominal and real prices showed a tendency to growth over the years up to the base date. Emphasizing the non-normality of waste errors. As well as the presence of stationary of the series under analysis. The price of beef cattle beef was mainly sensitive to the lagged price, showing that the price in the period prior to the present exerts a decisive influence on the price formation. Just as the variable prices of the calf and corn had an influence on the formation of the arroba arroba price, these were not higher than the price of the arroba itself. The fact is that, over the period analyzed, beef became more expensive for the final consumer due to the generalized increase in prices (inflation).

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