In economics, the mechanism that uses changing prices to coordinate buyers’ demand with sellers’ supply is the price mechanism.
Prices communicate information and create incentives. When a product becomes scarce, its price may rise, encouraging consumers to buy less or seek alternatives while encouraging producers to supply more. When unsold stocks accumulate, lower prices can attract buyers and discourage further production. Through these signals, decentralized decisions can influence resource allocation without a central planner directing every transaction.
The idea is associated with classical and neoclassical economics, although real markets rarely operate without frictions. Taxes, subsidies, regulations, imperfect information, market power, and externalities can all prevent prices from reflecting social costs and benefits accurately.
The price mechanism is not the same as the profit motive. Profit can motivate firms, while the price mechanism describes the broader information-and-incentive process through which prices coordinate market participants.