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• W4220854126 abstract "We propose to generalize the Wishart state-space model for realized covariance matrices of asset returns in order to capture complex measurement error structures induced by modern robust and data efficient realized covariance estimators and heterogeneous liquidity across assets. Our model assumes that the latent covariance matrix of the assets is observed through their realized covariance matrix with a Riesz measurement density, which generalizes the Wishart to monotone missing data. The Riesz alleviates the Wishart-implied attenuation of measurement errors and translates into a convenient likelihood factorization which facilitates inference using simple Bayesian MCMC procedures. The state-space approach allows for a flexible description of the covariance dynamics implied by the data and an empirical application shows that the model performs very well in- and out-of-sample." @default.
• W4220854126 created "2022-04-03" @default.
• W4220854126 creator A5003718928 @default.
• W4220854126 creator A5055963478 @default.
• W4220854126 date "2023-07-01" @default.
• W4220854126 modified "2023-09-26" @default.
• W4220854126 title "Modeling realized covariance measures with heterogeneous liquidity: A generalized matrix-variate Wishart state-space model" @default.
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• W4220854126 doi "https://doi.org/10.1016/j.jeconom.2022.01.007" @default.
• W4220854126 hasPublicationYear "2023" @default.
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