This paper proposes a model
to assess the role of demand elasticity in mitigating the effects of
supply side strategic bidding behaviour in a spot electricity market.
We model the supply side within a Conjectural Supply Function (CSF)
framework, which allows incorporating exogenous changes in demand
elasticity and different levels of competition in a given market. The
impacts of demand responsiveness on the market performances are
studied resorting to a set of
proposed indexes that are applied to a model of the Italian market.