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Modelling the volatility of commodities prices using a stochastic volatility model with random level shifts
(Pontificia Universidad Católica del Perú. Departamento de Economía, 2016-03)
We use the approach of Qu and Perron (2013) for the modeling and inference of volatility of a set
of commodity prices in the presence of level shifts of unknown timing, magnitude and frequency.
The model has two features: ...