Due to the oligopoly structure of the electricity markets and to the constraints imposed by the transmission network, the producers may exert market power by strategically bidding higher than their marginal costs. This brings market performance far from the perfect competition equilibrium, with higher market clearing price and extra surpluses obtained by the producers. Demand elasticity can significantly affect the market performance contributing to mitigate the strategic bidding behavior of the producers. Compared to other commodity markets, demand elasticity in the electricity markets is low, but even a small increase can result in appreciable improvement of the market performance. The network constraints of the power system play a specific role in determining the oligopoly equilibrium of the gaming behavior of the electricity producers. The model of supply function equilibrium is first applied to a simple three-bus test system for a conceptual analysis and then to a standard IEEE 30-bus test system. The effects of an increase of demand elasticity are assessed, resorting to a set of proper quantitative indexes

The emergence of peer-to-peer platforms, known as the sharing economy, has empowered people to market their own products and services. However, there are information asymmetries that make it difficult to evaluate the reputation of the seller a priori. This article examines how sellers have to enhance their personal reputation to optimize revenues. The study proposes a revenue model where, given a frontier that depends on the shared assets, the maximization of revenues depends on reputational factors of the person and of the product. An empirical validation of the framework has been conducted in the context of Airbnb, a popular sharing economy travel platform. The sample comprises 981 establishments across five European cities. The findings suggest the crucial importance of personal reputation along with some distinctive reputational attributes of the product itself. These results emphasize the role of trust and personal branding strategies in peer-to-peer platforms.