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• W791640261 abstract "A two-stage model for estimating value-at-risk based on grey system and extreme value theory is proposed. Firstly, in order to capture the dependencies, seasonalities and volatility-clustering, an GM(1,2) model is used to filter electricity price series. In this way, an approximately independently and identically distributed residual series with better statistical properties is acquired. Then peaks over threshold is adopted to explicitly model the tails of the residuals of GM(1,2) model, and accurate estimates of electricity market value-at-risk can be produced. For conquering the difficulty lacking for sample data over threshold, Bayesian estimation based on Markov Chain Monte Carlo simulation is used to estimate the parameters of peaks over threshold model. The empirical analysis shows that the proposed model can be rapidly reflect the most recent and relevant changes of electricity prices and can produce accurate forecasts of value-at-risk at all confidence levels, and the computational cost is far less than the existing two-stage value-at-risk estimating models, further improving the ability of risk management for electricity market participants." @default.
• W791640261 created "2016-06-24" @default.
• W791640261 creator A5019041035 @default.
• W791640261 date "2014-11-01" @default.
• W791640261 modified "2023-09-23" @default.
• W791640261 title "Bayesian Estimation of Value-at-risk Based on Gray Peaks over Threshold" @default.
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• W791640261 hasPublicationYear "2014" @default.
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