Autoregressive Dynamics
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Determinants and spatial dependence of innovation in Brazilian regions: evidence from a Spatial Tobit Model
Resumo Este artigo busca analisar os determinantes da inovação, os padrões espaciais e a dependência espacial da inovação nas microrregiões brasileiras. Em concreto, ele avalia como o P&D das empresas locais, a pesquisa acadêmica regional, o nível de aglomeração e a especialização ou diversificação industrial da localidade afetam a inovação
Nova econ.. Publicado em: 10/10/2019
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2. Dinâmica e Transição da Incerteza no Brasil: uma investigação de autorregressão quantílica
Resumo Recentemente, o número de estudos sobre incerteza na economia tem aumentado, em parte, devido às novas técnicas que permitem a construção de proxies adequadas para a incerteza, fundamentalmente não observável, com destaque à técnica de webscrapping, que permite extrair informações online e atualizadas, e que tem sido frequentemente utilizad
Estud. Econ.. Publicado em: 10/07/2019
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3. Estimação e previsão da estrutura a termo das taxas de juros usando técnicas de inteligência computacional / Term structure of interest rate modeling and forecasting using computational intelligence techniques
This work proposes the term structure of interest rates modeling and forecasting using computational intelligence techniques, based on data from the US and Brazilian fixed income markets. The yield curve modeling includes the use of some evolutionary computation methods like Genetic Algorithms, Differential Evolution and Evolution Strategies in comparison wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2012
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4. Liberalização da conta de capital e fluxos de portfólio para o Brasil
The present work seeks to investigate the dynamics of capital account liberalization and its impact on short run capital flows to Brazil in the period of 1995-2002, considering different segments such as the monetary, derivative and equity markets. This task is pursued by developing a comparative study of financial flows and examining how it is affected by t
Publicado em: 25/06/2010
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5. Avaliação de controle neural a um processo de quatro tanques acoplados
The main goal of this doctorate thesis is the evaluation of neural control on a four interconnected tanks process, in laboratory environment, where the controlled variable is the water level height of the fourth tank. The dynamics of this process is non linear, as the outflow from the tanks depends on the square root of corresponding water height. This type
Publicado em: 2009
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6. Transmission of prices and volatility in the marketing of pork / Transmissão de preços e da volatilidade na comercialização da carne suína
The pork chain, despite showing significant technical improvement and competitiveness, is still one of the most volatile sectors of Brazilian agribusiness, and marketing and price fluctuation is one of the main barriers for its development. Accordingly, the present study aimed to analyze the price ratios and volatility among production agents and major meat
Publicado em: 2009
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7. Utilização de medidas de previsibilidade em sinais de voz para discriminação de patologias de laringe / Application of predictability measures to voice signals for larynx pathology differentiation
This thesis presents initial studies of the application of predictability measures to voice signal analysis. Its aim is to develop methods that are capable of differentiating healthy and pathological signals, also amongst pathologies. In order to do that, we perform an attempt to measure the uncertainty and predictability variations of the signals from the a
Publicado em: 2009
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8. Effects of transaction costs on the spatial integration of the internal market for frozen whole chicken / Efeitos de custos de transação sobre a integração espacial de mercados regionais de carne de frango no Brasil
Non-negligible transaction costs restrict the transmission of price shock between markets spatially separated, reducing the possibilities that the markets may become economically integrated. The aim of this work was to analyze the effects of transaction costs on the spatial integration of the internal market for frozen whole chicken, from January 1998 to Jun
Publicado em: 2008
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9. Dinâmica econômica das flutuações na produção de cana-de-açúcar / Economic dynamics from fluctuations in the Brazilian sugar cane production
Since the mid 70s, the Brazilian sugar and ethanol markets have passed through noteworthy changes, leading the country back to the position of number one sugar cane producer in the world. The objective of this thesis is to evaluate the whole of shocks in supply (measured by area and yield unexpected variations), in demand (measured by domestic income and exp
Publicado em: 2008
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10. EMPIRICAL ANALYSIS OF THE QUANTILE AUTOREGRESSION MODELS / ANÁLISE EMPÍRICA DOS MODELOS DE AUTO-REGRESSÃO QUANTÍLICA
Autoregressive models (AR(p)) for time series assume that the series dynamics has a linear dependence on past observations up to a lag p, plus an independent and identically distributed (i.i.d.) random error. Quantile autoregressive models (QAR(p)) generalize the AR(p) by allowing different autoregressive coefficients for different quantiles of the condition
Publicado em: 2007
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11. "Dinâmicas autoregressivas em econofísica" / "Autoregressive dynamics in Econophysics"
Neste trabalho, fazemos uma breve introdução à Econofísica e às grandezas estatísticas relevantes para o estudo de um ativo financeiro. Estas grandezas são estudadas detalhadamente para o índice NYSE Composto. Determinamos o tempo de autocorrelação e o espectro de potência, cujos resultados indicam a presença de uma correlação de curto alcance.
Publicado em: 2007
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12. Effectiveness analysis of statics and dynamics hedge strategies for Brazilian arabian coffee market / Análise da efetividade das estratégias estáticas e dinâmicas de hedge para o mercado brasileiro de café arábica
This work was the purpose of analyzing the hedge strategies effectiveness, in terms of risks reduction to the arabian coffee market, with the futures markets use. It was observed, a priori, that arabian coffee is among the most risky products of the Brazilian agribusiness. Moreover, it was detected low use of futures mechanism not only for this product, but
Publicado em: 2007