Physics – Physics and Society
Scientific paper
2006-09-08
Journal of Statistical Mechanics: Theory and Experiment (2006) P11011
Physics
Physics and Society
16 pages, 7 figures
Scientific paper
10.1088/1742-5468/2006/11/P11011
The electricity market is a very peculiar market due to the large variety of phenomena that can affect the spot price. However, this market still shows many typical features of other speculative (commodity) markets like, for instance, data clustering and mean reversion. We apply the diffusion entropy analysis (DEA) to the Nordic spot electricity market (Nord Pool). We study the waiting time statistics between consecutive spot price spikes and find it to show anomalous scaling characterized by a decaying power-law. The exponent observed in data follows a quite robust relationship with the one implied by the DEA analysis. We also in terms of the DEA revisit topics like clustering, mean-reversion and periodicities. We finally propose a GARCH inspired model but for the price itself. Models in the context of stochastic volatility processes appear under this scope to have a feasible description.
Masoliver Jaume
Montero Miquel
Palatella Luigi
Perelló Josep
Simonsen Ingve
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