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- W2039409870 abstract "We investigate the extremal clustering behaviour of stationary time series that possess two regimes, where the switch is governed by a hidden two-state Markov chain. We also suppose that the process is conditionally Markovian in each latent regime. We prove under general assumptions that above high thresholds these models behave approximately as a random walk in one (called dominant) regime and as a stationary autoregression in the other (dominated) regime. Based on this observation, we propose an estimation and simulation scheme to analyse the extremal dependence structure of such models, taking into account only observations above high thresholds. The properties of the estimation method are also investigated. Finally, as an application, we fit a model to high-level exceedances of water discharge data, simulate extremal events from the fitted model, and show that the (model-based) flood peak, flood duration and flood volume distributions match their observed counterparts." @default.
- W2039409870 created "2016-06-24" @default.
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- W2039409870 date "2009-06-01" @default.
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- W2039409870 title "Modelling extremes of time-dependent data by Markov-switching structures" @default.
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- W2039409870 doi "https://doi.org/10.1016/j.jspi.2008.08.022" @default.
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