A conditionally heteroskedastic model with time-varying coefficients for daily gas spot prices
This paper examines the relationship between gas spot prices at the Zeebrugge market, one-month ahead Brent prices and temperatures over the period 2000–2005. A cointegration analysis is carried out and it is discovered that a cointegration relationship exists between the three series. To take into account the influence of temperature on the gas volatility, a GARCH(1,1) model with temperature-dependent coefficients is considered. Stability and estimation properties are discussed. An empirical finding is the existence of distinct volatility regimes for the volatility of gas prices, depending on the temperature level.
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- Panagiotidis, Theodore & Rutledge, Emilie, 2007. "Oil and gas markets in the UK: Evidence from a cointegrating approach," Energy Economics, Elsevier, vol. 29(2), pages 329-347, March.
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- Christian Francq & Antony Gautier, 2004. "Large sample properties of parameter least squares estimates for time-varying arma models," Journal of Time Series Analysis, Wiley Blackwell, vol. 25(5), pages 765-783, 09.
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