The liberalization of the electricity market, already affirmed in many European and worldwide countries, has originated many technical debates over the definition of the market model that can be considered as optimal for electricity. The required simplicity and transparency of market rules often contrast with the intrinsic complexity of the electrical system, due to physical and security requirements. For these reasons, issues related to the mechanism for bid selection in the energy market are one of the most debated during the phase of market rules definition. In this paper, we present an analysis of the possible quantitative impact of complex bids in the Italian electricity day-ahead market, in order to evaluate benefits and drawbacks.
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