In economics, a free market is a system in which the prices for goods and services are self-regulated by buyers and sellers negotiating in an open market. In a free market, the laws and forces of supply and demand are free from any intervention by a government or other authority, and from all forms of economic privilege, monopolies and artificial scarcities. Proponents of the concept of free market contrast it with a regulated market in which a government intervenes in supply and demand through various methods such as tariffs used to restrict trade and to protect the local economy. In an idealized free-market economy, prices for goods and services are set freely by the forces of supply and demand and are allowed to reach their point of equilibrium without intervention by government policy.