The
market is normally
self-regulated. It suffers from one-time failures when economic agents engage in anti-competitive behavior, mainly the abuse of dominant positions in the ordinary markets, or the
abuse of markets in the financial markets, sanctioned
ex post by the authorities in individual decisions. But some
sectors suffer from structural failures, which prevent them, even without malicious intent of agents, from reaching this mechanism of adjustment of supply and demand. The existence of an economically natural monopoly, for example a
transport network, constitutes a structural failure. Another agent will not duplicate once the first network has been built, which prevents
competition. An a-competitive regulation, either by nationalization, by a state control or by a control by a regulatory authority, is needed to ensure everyone's
access to an
essential facility. Also constitutes a market failure
asymmetry of information, theorized through the
notion of agency that hinders the availability and circulation of exhaustive and reliable
information on markets, especially financial markets. This market failure carries with it a systemic risk, against which regulation is definitely built and entrusted to financial regulators and
central banks. In these cases, the implementation of regulations is a reaction of the
State not so much by political rejection of the Market, but because the competitive economy is unfit to function. This has nothing to do with the hypothesis that the State is distancing itself from the Market, not because it is structurally flawed in relation to its own model, but because politics wants to impose higher values, expressed By the
public service, whose market does not always satisfy the missions.