  We propose a model for the description and the forecast of the gross prices
of electricity in the liberalized Italian energy market via an additive
two-factor model driven by both a Hawkes and a fractional Brownian processes.
We discuss the seasonality, the identification of spikes and the estimates of
the Hurst coefficient. After the calibration and the validation of the model,
we discuss its forecasting performance via a class of adequate evaluation
metrics.

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