Milton Friedman in the context of "Monetary policy"

Full employment is an economic situation in which there is no cyclical or deficient-demand unemployment. Full employment does not entail the disappearance of all unemployment, as other kinds of unemployment, namely structural and frictional, may remain. Full employment does not entail 100% employment-to-population ratio. For instance, workers who are "between jobs" for short periods of time as they search for better employment are not counted against full employment, as such unemployment is frictional rather than cyclical. An economy with full employment might also have unemployment or underemployment where part-time workers cannot find jobs appropriate to their skill level, as such unemployment is considered structural rather than cyclical. Full employment marks the point past which expansionary fiscal and/or monetary policy cannot reduce unemployment any further without causing inflation.

Some economists define full employment somewhat differently, as the unemployment rate at which inflation does not continuously increase. Advocacy of avoiding accelerating inflation is based on a theory centered on the concept of the Non-Accelerating Inflation Rate of Unemployment (NAIRU) and those who hold it usually mean NAIRU when speaking of full employment. The NAIRU has also been described by Milton Friedman, among others, as the "natural" rate of unemployment. Such views tend to emphasize sustainability, noting that a government cannot sustain unemployment rates below the NAIRU forever: inflation will continue to grow so long as unemployment lies below the NAIRU.

The non-accelerating inflation rate of unemployment (NAIRU) is a theoretical level of unemployment below which inflation would be expected to rise. It was first introduced as the NIRU (non-inflationary rate of unemployment) by Franco Modigliani and Lucas Papademos in 1975, as an improvement over the "natural rate of unemployment" concept, which was proposed earlier by Milton Friedman.

In the United States, estimates of the NAIRU ranged between 5 and 6% in the late 20th and early 21st centuries, but have fallen to below 4% since the recovery from the 2008 financial crisis. Monetary policy conducted under the assumption of a NAIRU typically involves allowing just enough unemployment in the economy to prevent inflation rising above a given target figure. Prices are allowed to increase gradually and some unemployment is tolerated.

The natural rate of unemployment is the name that was given to a key concept in the study of economic activity. Milton Friedman and Edmund Phelps, tackling this 'human' problem in the 1960s, both received the Nobel Memorial Prize in Economic Sciences for their work, and the development of the concept is cited as a main motivation behind the prize. A simplistic summary of the concept is: 'The natural rate of unemployment, when an economy is in a steady state of "full employment", is the proportion of the workforce who are unemployed'. Put another way, this concept clarifies that the economic term "full employment" does not mean "zero unemployment". It represents the hypothetical unemployment rate consistent with aggregate production being at the "long-run" level. This level is consistent with aggregate production in the absence of various temporary frictions such as incomplete price adjustment in labor and goods markets. The natural rate of unemployment therefore corresponds to the unemployment rate prevailing under a classical view of determination of activity.

The natural unemployment rate is mainly determined by the economy's supply side, and hence production possibilities and economic institutions. If these institutional features involve permanent mismatches in the labor market or real wage rigidities, the natural rate of unemployment may feature involuntary unemployment. The natural rate of unemployment is a combination of frictional and structural unemployment that persists in an efficient, expanding economy when labor and resource markets are in equilibrium.

The Chicago school of economics is a neoclassical school of economic thought associated with the work of the faculty at the University of Chicago, some of whom have constructed and popularized its principles. Milton Friedman and George Stigler are considered the leading scholars of the Chicago school.

Chicago macroeconomic theory rejected Keynesianism in favor of monetarism until the mid-1970s, when it turned to new classical macroeconomics heavily based on the concept of rational expectations. The freshwater–saltwater distinction is largely antiquated today, as the two traditions have heavily incorporated ideas from each other. Specifically, new Keynesian economics was developed as a response to new classical economics, electing to incorporate the insight of rational expectations without giving up the traditional Keynesian focus on imperfect competition and sticky wages.

The Phillips curve is a representation of the relationship between unemployment and inflation in the macroeconomy, where a tradeoff between low unemployment and price stability exists. Identified by economist Bill Phillips, the curve shows a relationship between lowering unemployment with increasing wages in an economy. While Phillips did not directly link employment and inflation, this was a trivial deduction from his statistical findings. Classical economists Paul Samuelson and Robert Solow made the connection explicit, followed by the theoretical arguments developed by Milton Friedman and Edmund Phelps.

While there is a short-run tradeoff between unemployment and inflation, it has not been observed in the long run. In 1967 and 1968, Friedman and Phelps asserted that the Phillips curve was only applicable in the short run and that, in the long run, inflationary policies would not decrease unemployment. Friedman correctly predicted the stagflation of the 1970s.

The Chicago Boys were a group of Chilean economists who rose to prominence in the 1970s and 1980s. Most were educated at the University of Chicago Department of Economics under influential figures like Milton Friedman, Arnold Harberger, and Larry Sjaastad, or at its academic partner, the Pontificia Universidad Católica de Chile. After returning to Latin America, they assumed key roles as economic advisors in several South American governments, most notably the military dictatorship of Chile (1973–1990), where many attained the highest economic offices. Their free-market policies later influenced conservative governments abroad, including those of Ronald Reagan in the United States and Margaret Thatcher in the United Kingdom.

The commercial state concept (and its important variant, commercial society) is sometimes associated with Adam Ferguson's concept of civil society and refers to a government or political state devoted primarily to the promotion and advancement of commercial interests. Ferguson, Adam Smith and other representatives of the Scottish Enlightenment (and who referred to themselves as the literati) were more likely to use the term commercial society. The underlying idea of the commercial state can also be linked to the American School of Economics (and in particular to the legacy of the political and economic approach of Alexander Hamilton). In its modern manifestation, national, state and local governments which pursue business and commercial development and other forms of economic and industrial development through tax policies and forms of positive incentives and inducements may properly be termed commercial states. Practical commercial state activities include governmental economic development efforts including encouraging plant relocations, tax rebates, zoning easements and assorted other incentives and concessions.

Several lines of thought and action (e.g. Mercantilism) run from ancient Greek and Roman philosophy through Ferguson and Adam Smith. They can be traced through the Federalist party of Alexander Hamilton and more recently Austrian economists such as Ludwig von Mises, Frederick Hayek. An essentially commercial view of the state has continued down to modern theorists including Milton Friedman and Murray Rothbard, who argue not only for a limited role for government, but also that that residual role is heavily commercial. The modern U.S. Republican Party and Democratic Party in the U.S. both include significant factions of commercial state adherents, although commercial state rhetoric is usually much more evident in the former. (See, for example, discussions of Reaganomics in Ronald Reagan and the U.S. Republican Party.)

Positive non-interventionism (Chinese: 積極不干預) was the economic policy of Hong Kong; this policy can be traced back to the time when Hong Kong was under British rule. It was first officially implemented in 1971 by Financial Secretary of Hong Kong John Cowperthwaite, influenced by Arthur Grenfell Clarke and Geoffrey Follows which believed that the economy was doing well in the absence of government intervention but that it was important to create the regulatory and physical infrastructure to facilitate market-based decision making. The policy was continued by subsequent Financial Secretaries, including Sir Philip Haddon-Cave. Economist Milton Friedman has cited it as a fairly comprehensive implementation of laissez-faire policy. While other describe it as an variant of corporatism or even as a mixed economic system.

Irving Fisher (February 27, 1867 – April 29, 1947) was an American economist, statistician, inventor, eugenicist and progressive social campaigner. He was one of the earliest American neoclassical economists, though his later work on debt deflation has been embraced by the post-Keynesian school. Joseph Schumpeter described him as "the greatest economist the United States has ever produced", an assessment later repeated by James Tobin and Milton Friedman.

Fisher made important contributions to utility theory and general equilibrium. He was also a pioneer in the rigorous study of intertemporal choice in markets, which led him to develop a theory of capital and interest rates. His research on the quantity theory of money inaugurated the school of macroeconomic thought known as "monetarism". Fisher was also a pioneer of econometrics, including the development of index numbers. Some concepts named after him include the Fisher equation, the Fisher hypothesis, the international Fisher effect, the Fisher separation theorem and Fisher market.