An estate agent will know about the quirks of their local housing market, the individual shop manager has the most detailed knowledge of how to motivate their difficult staff members, and a specific consumer knows that she prefers one cookie over another, even if she cannot explain why. This practical, on-the-ground information simply can\u2019t be collated by government. A central authority will therefore only ever have access to a tiny fraction of the knowledge that goes into making economic decisions. This \u201cknowledge problem\u201d means that central planning tends to inefficiency and, so, relative poverty.<\/p>\n

Fortunately, a market economy is able to harness that knowledge without requiring a central authority to try collating uncollectable information. That\u2019s because every time someone makes a decision based upon their preferences\u2014whether buying eggs or hiring staff\u2014it feeds into market prices. Prices, according to Hayek, thus act as signals that reflect all knowledge, including the dispersed, tacit knowledge held by individuals.<\/p>\n

Furthermore, when circumstances change, new local knowledge can quickly be communicated and transmitted through market prices without the rest of us needing to know all the underlying details. Egg prices might rise due to a localized bird flu, but more distant consumers and other producers need not follow the epidemiology of the disease in deciding how to react. Consumers adjust to the higher egg price from this supply-shock in stores by buying fewer, while other producers have more of an incentive to increase their own supply. That process helps supply and demand equilibrate. Dynamic market prices thus allow us to coordinate millions of individual decisions relatively efficiently, alleviating the \u201cknowledge problem\u201d without central direction.<\/p>\n

Hayek recognized that market prices are thus crucial to both our economic resilience and ongoing prosperity. He writes:<\/p>\n

The whole acts as one market, not because any of its members survey the whole field, but because their limited individual fields of vision sufficiently overlap so that through many intermediaries the relevant information is communicated to all. The mere fact that there is one price for any commodity\u2014or rather that local prices are connected in a manner determined by the cost of transport, etc.\u2014brings about the solution which (it is just conceptually possible) might have been arrived at by one single mind possessing all the information which is in fact dispersed among all the people involved in the process.<\/p>\n

\u2026.<\/p>\n

The marvel is that in a case like that of a scarcity of one raw material, without an order being issued, without more than perhaps a handful of people knowing the cause, tens of thousands of people whose identity could not be ascertained by months of investigation, are made to use the material or its products more sparingly; that is, they move in the right direction.<\/p>\n

Few governments these days attempt to engage in direct central planning, of course. Nevertheless, although Hayek\u2019s essay wasn\u2019t a direct policy document, its insights about the \u201cknowledge problem\u201d provide at least three valuable lessons for modern governments:<\/p>\n

Support decentralized systems:<\/strong> Governments should prioritize policies that allow individuals and businesses to act on their local knowledge. This ensures greater adaptability and experimentation, leading to efficient outcomes without top-down interference.
\nIndustrial policies require other rationales:\u00a0<\/strong>Given the \u201cknowledge problem\u201d and how central planning harms efficiency, industrial or spatial planning or favoritism must be justified by other aims, like national security or a direct effort to redistribute activity.
\nAvoid price controls:<\/strong> Market prices serve as vital signals for coordinating economic activity. By manipulating prices\u2014through controls or regulations\u2014governments distort these signals, undermining the effective communication of dispersed knowledge.<\/p>\n

In short, Hayek\u2019s insights showed us that economic freedom under the law and a system of market prices are essential prerequisites for prosperity.<\/p>\n