Milton Friedman (July 31, 1912 – November 16, 2006) was an American economist, statistician, academic, and author who taught at the University of Chicago for more than three decades. He was a recipient of the Nobel Memorial Prize in Economic Sciences.

Among scholars, he is best known for his theoretical and empirical research, especially consumption analysis, monetary history and theory, and for his demonstration of the complexity of stabilization policy. He was an economic advisor to U.S. President Ronald Reagan. Over time, many governments practiced his restatement of a political philosophy that extolled the virtues of a free market economic system with little intervention by government. As a leader of the Chicago school of economics, based at the University of Chicago, he had great influence in determining the research agenda of the entire profession. Milton Friedman's works, which include many monographs, books, scholarly articles, papers, magazine columns, television programs, videos, and lectures, cover a broad range of topics of microeconomics, macroeconomics, economic history, and public policy issues. The Economist described him as "the most influential economist of the second half of the 20th century…possibly of all of it."

Friedman was originally a Keynesian, a supporter of the New Deal and an advocate of government intervention in the economy. However, his 1950s reinterpretation of the Keynesian consumption function challenged the standard Keynesian model of that time. At the University of Chicago, Friedman became the main advocate opposing activist Keynesian government policies. During the 1960s he promoted an alternative macroeconomic policy known as "monetarism". He theorized there existed a "natural rate of unemployment," and argued that governments could not change this natural rate. He argued that the Phillips Curve was not stable, and predicted that then - existing Keynesian policies would cause high inflation and minimal growth (later termed stagflation). Friedman's claim that monetary policy could have prevented the Great Depression was an attempt to refute the analysis of Keynes, who argued that monetary policy is ineffective during depression conditions, and that large scale deficit spending by the government is needed to decrease mass unemployment. Though opposed to the existence of the Federal Reserve, Friedman argued that, given that it does exist, a steady, small expansion of the money supply was the only wise policy, and he warned against efforts by a treasury or central bank to do otherwise.

Influenced by his close friend George Stigler, Friedman opposed government regulation of many types. He once stated that his role in eliminating U.S. conscription was his proudest accomplishment, and his support for school choice led him to found The Friedman Foundation for Educational Choice. Friedman's political philosophy, which he considered classically liberal and libertarian, emphasized the advantages of free market economics and the disadvantages of government intervention and regulation, strongly influencing the opinions of American conservatives and libertarians. In his 1962 book Capitalism and Freedom, Friedman advocated policies such as a volunteer military, freely floating exchange rates, abolition of medical licenses, a negative income tax, and education vouchers. His books and essays were well read and were even circulated illegally in Communist countries.

Most economists during the 1960s rejected Friedman's economic views, but since then they have had an increasing international influence (especially in the United States and United Kingdom). Some of his laissez - faire ideas concerning monetary policy, taxation, privatization and deregulation were used by governments, especially during the 1980s. His monetary theory has had a large influence on economists such as Ben Bernanke and the Federal Reserve's response to the financial crisis of 2007 – 2010.

Friedman was born in Brooklyn, New York, to recent Jewish immigrants Jenő Friedman and Sára Landau from Beregszász in Hungary (now Berehove, part of Ukraine), both of whom worked as dry goods merchants. Shortly after Milton's birth, the family relocated to Rahway, New Jersey. A talented student, Friedman graduated from Rahway High School in 1928, just before his 16th birthday.

Friedman graduated from Rutgers University in New Jersey, where he specialized in mathematics and initially intended to become an actuary. During his time at Rutgers, Friedman became influenced by two economics professors, Arthur F. Burns and Homer Jones, who convinced him that modern economics could help end the Great Depression. Friedman did graduate work at the University of Chicago, earning an M.A. in 1933. He was strongly influenced by Jacob Viner, Frank Knight, and Henry Simons. It was at Chicago that Friedman met his future wife, economist Rose Director. During 1933 – 34 he had a fellowship at Columbia University, where he studied statistics with renowned statistician and economist Harold Hotelling. He was back in Chicago for 1934 – 35, spending the year working as a research assistant for Henry Schultz, who was then working on Theory and Measurement of Demand. That year, Friedman formed what would prove to be lifelong friendships with George Stigler and W. Allen Wallis.

Friedman was initially unable to find academic employment, so during 1935, he followed his friend W. Allen Wallis to Washington, where Franklin D. Roosevelt's New Deal was "a lifesaver" for many young economists. At this stage, Friedman said that he and his wife "regarded the job creation programs such as the WPA, CCC, and PWA appropriate responses to the critical situation," but not "the price - and wage - fixing measures of the National Recovery Administration and the Agricultural Adjustment Administration." Foreshadowing his later ideas, he believed price controls interfered with an essential signaling mechanism to help resources be used where they were most valued. Indeed, Friedman later concluded that all government intervention associated with the New Deal was "the wrong cure for the wrong disease," arguing that the money supply should simply have been expanded, instead of contracted. In the publication Monetary History of the United States by Friedman and Anna Schwartz, they argue that the Great Depression was caused by monetary contraction, which was the consequence of poor policymaking by the Federal reserve and the continuous crises of the banking system.

During 1935, he began work for the National Resources Committee, which was then working on a large consumer budget survey. Ideas from this project later became a part of his Theory of the Consumption Function. Friedman began employment with the National Bureau of Economic Research during autumn 1937 to assist Simon Kuznets in his work on professional income. This work resulted in their jointly authored publication Incomes from Independent Professional Practice, which introduced the concepts of permanent and transitory income, a major component of the Permanent Income Hypothesis that Friedman worked out in greater detail in the 1950s. The book hypothesizes that professional licensing artificially restricts the supply of services and raises prices.

During 1940, Friedman was appointed an assistant professor teaching Economics at the University of Wisconsin – Madison, but encountered antisemitism in the Economics department and decided to return to government service. Friedman spent 1941 – 43 working on wartime tax policy for the Federal Government, as an advisor to senior officials of the United States Department of the Treasury. As a Treasury spokesman during 1942 he advocated a Keynesian policy of taxation, and during this time he helped to invent the payroll withholding tax system. He later said in an interview, "I have no apologies for it, but I really wish we hadn't found it necessary and I wish there were some way of abolishing withholding now." As Friedman grew older he reversed himself; during 2006 he observed, "You know, it's a mystery as to why people think Roosevelt's policies pulled us out of the Depression. The problem was that you had unemployed machines and unemployed people. How do you get them together by forming industrial cartels and keeping prices and wages up?"

During 1943, Friedman joined the Division of War Research at Columbia University (headed by W. Allen Wallis and Harold Hotelling), where he spent the rest of the war years working as a mathematical statistician, focusing on problems of weapons design, military tactics, and metallurgical experiments. Then during 1945, Friedman submitted Incomes from Independent Professional Practice (co-authored with Kuznets and completed during 1940) to Columbia as his doctoral dissertation. The university awarded him a Ph.D. during 1946. Friedman spent the 1945 – 46 academic year teaching at the University of Minnesota (where his friend George Stigler was employed). On February 12, 1945, his son, David D. Friedman was born.

During 1946, Friedman accepted an offer to teach economic theory at the University of Chicago (a position opened by departure of his former professor Jacob Viner to Princeton University). Friedman would work for the University of Chicago for the next 30 years. There he helped build an intellectual community that produced a number of Nobel Prize winners, known collectively as the Chicago School of Economics.

At that time, Arthur Burns, who was then the head of the National Bureau of Economic Research, asked Friedman to rejoin the Bureau's staff. He accepted the invitation, and assumed responsibility for the Bureau's inquiry into the role of money in the business cycle. As a result, he initiated the "Workshop in Money and Banking" (the "Chicago Workshop"), which promoted a revival of monetary studies. During the latter half of the 1940s, Friedman began a collaboration with Anna Schwartz, an economic historian at the Bureau, that would ultimately result in the 1963 publication of a book co-authored by Friedman and Schwartz, A Monetary History of the United States, 1867 – 1960.

Friedman spent the 1954 – 55 academic year as a Fulbright Visiting Fellow at Gonville and Caius College, Cambridge. At the time, the Cambridge economics faculty was divided into a Keynesian majority (including Joan Robinson and Richard Kahn) and an anti - Keynesian minority (headed by Dennis Robertson). Friedman speculates that he was invited to the fellowship because his views were unacceptable to both of the Cambridge factions. Later his weekly columns for Newsweek magazine (1966 – 84) were well read and increasingly influential among political and business people.

Friedman was an economic adviser to Republican presidential candidate Barry Goldwater during 1964, who lost to Lyndon Johnson.

In 1976 Friedman won the Nobel Memorial Prize in Economics "for his achievements in the fields of consumption analysis, monetary history and theory and for his demonstration of the complexity of stabilization policy." During the banquet speech he made a reference to “the Prize in Economic Sciences in Memory of Alfred Nobel”. In that he was the first recipient to do so, and it wasn’t until 2006 that a recipient of the prize called it by its proper name. During 1977, at age 65, Friedman retired from the University of Chicago after teaching there for 30 years. He and his wife moved to San Francisco. From 1977 on, he was affiliated with the Hoover Institution at Stanford University. During the same year, Friedman was approached by the Free To Choose Network and asked to create a television program presenting his economic and social philosophy. The Friedmans worked on this project for the next three years, and during 1980, the ten - part series, titled Free to Choose, was broadcast by the Public Broadcasting Service (PBS). The companion book to the series (co-authored by Milton and his wife, Rose Friedman), also titled Free To Choose, was the bestselling nonfiction book of 1980 and has since been translated into 14 foreign languages.

Friedman served as an unofficial adviser to Ronald Reagan during his 1980 presidential campaign, and then served on the President's Economic Policy Advisory Board for the rest of the Reagan Administration. During 1988, he received the National Medal of Science and Reagan honored him with the Presidential Medal of Freedom. Milton Friedman is known now as one of the most influential economists of the 20th century. Throughout the 1980s and 1990s, Friedman continued to write editorials and appear on television. He made several visits to Eastern Europe and to China, where he also advised governments.

Friedman was best known for reviving interest in the money supply as a determinant of the nominal value of output, that is, the quantity theory of money. Monetarism is the set of views associated with modern quantity theory. Its origins can be traced back to the 16th century School of Salamanca or even further but Friedman's contribution is largely responsible for its modern popularization. He co-authored, with Anna Schwartz, A Monetary History of the United States (1963), which was an examination of the role of the money supply and economic activity in U.S. history. A striking conclusion of their research was one regarding the role of money supply fluctuations as contributing to economic fluctuations. Several regression studies with David Meiselman during the 1960s suggested the primacy of the money supply over investment and government spending in determining consumption and output. These challenged a prevailing but largely untested view on their relative importance. Friedman's empirical research and some theory supported the conclusion that the short - run effect of a change of the money supply was primarily on output but that the longer - run effect was primarily on the price level.

Friedman was the main proponent of the monetarist school of economics. He maintained that there is a close and stable association between price inflation and the money supply, mainly that price inflation should be regulated with monetary deflation and price deflation with monetary inflation. He famously quipped that price deflation can be fought by "dropping money out of a helicopter." Friedman's arguments were designed to counter popular claims that price inflation at the time was the result of increases in the price of oil, or increases in wages: as he wrote,

Inflation is always and everywhere a monetary phenomenon.

—Milton Friedman, Wincott Memorial Lecture, London, September 16, 1970

Friedman rejected the use of fiscal policy as a tool of demand management; and he held that the government's role in the guidance of the economy should be restricted severely. Friedman wrote extensively on the Great Depression, which he termed the Great Contraction, arguing that it had been caused by an ordinary financial shock whose duration and seriousness were greatly increased by the subsequent contraction of the money supply caused by the misguided policies of the directors of the Federal Reserve.

The Fed was largely responsible for converting what might have been a garden - variety recession, although perhaps a fairly severe one, into a major catastrophe. Instead of using its powers to offset the depression, it presided over a decline in the quantity of money by one - third from 1929 to 1933 ... Far from the depression being a failure of the free enterprise system, it was a tragic failure of government.

—Milton Friedman, Two Lucky People, 233

Friedman also argued for the cessation of government intervention in currency markets, thereby spawning an enormous literature on the subject, as well as promoting the practice of freely floating exchange rates. His close friend George Stigler explained, "As is customary in science, he did not win a full victory, in part because research was directed along different lines by the theory of rational expectations, a newer approach developed by Robert Lucas, also at the University of Chicago."

Friedman was also known for his work on the consumption function, the permanent income hypothesis (1957), which Friedman himself referred to as his best scientific work. This work contended that rational consumers would spend a proportional amount of what they perceived to be their permanent income. Windfall gains would mostly be saved. Tax reductions likewise, as rational consumers would predict that taxes would have to increase later to balance public finances. Other important contributions include his critique of the Phillips curve and the concept of the natural rate of unemployment (1968). This critique associated his name, together with that of Edmund Phelps, with the insight that a government that brings about greater inflation cannot permanently reduce unemployment by doing so. Unemployment may be temporarily lower, if the inflation is a surprise, but in the long run unemployment will be determined by the frictions and imperfections of the labor market.

Friedman's essay "The Methodology of Positive Economics" (1953) provided the epistemological pattern for his own subsequent research and to a degree that of the Chicago School of Economics. There he argued that economics as science should be free of value judgments for it to be objective. Moreover, a useful economic theory should be judged not by its descriptive realism but by its simplicity and fruitfulness as an engine of prediction.

One of his most famous contributions to statistics is sequential sampling. "Friedman did statistical work at the Division of War Research at Columbia. He and his colleagues came up with a sampling technique, known as sequential sampling, which became, in the words of The New Palgrave Dictionary of Economics, 'the standard analysis of quality control inspection.' The dictionary adds: 'Like many of Friedman’s contributions, in retrospect it seems remarkably simple and obvious to apply basic economic ideas to quality control; that however is a measure of his genius.'"

Friedman was an important member of the team during World War II that developed a new proximity fuse for anti - aircraft projectiles, which prevented shells from exploding unless they were near the object they are meant to destroy.

He was critical of the Federal Reserve's influence on the economics profession. In a 1993 letter to University of Texas economics professor and former House Banking Committee investigator Robert Auerbach, Friedman wrote:

I cannot disagree with you that having something like 500 economists is extremely unhealthy. As you say, it is not conducive to independent, objective research. You and I know there has been censorship of the material published. Equally important, the location of the economists in the Federal Reserve has had a significant influence on the kind of research they do, biasing that research toward noncontroversial technical papers on method as opposed to substantive papers on policy and results.

In his 1955 article "The Role of Government in Education" Friedman proposed supplementing publicly operated schools with privately run but publicly funded schools through a system of school vouchers. Reforms similar to those proposed in the article were implemented in, for example, Chile in 1981 and Sweden in 1992. In 1996 Friedman, together with his wife, founded the The Foundation for Educational Choice to advocate school choice and vouchers. Friedman also supported libertarian policies such as legalization of drugs and prostitution. Milton Friedman was a major proponent of a volunteer military, stating that the draft was "inconsistent with a free society." In Capitalism and Freedom, he argued that conscription is inequitable and arbitrary, preventing young men to shape their lives as they see fit. During the Nixon administration he headed the committee to research a conversion to paid / volunteer armed force. He would later state that his role in eliminating the conscription in the United States was his proudest accomplishment. Friedman did, however, believe a nation could compel military training as a reserve in case of war time.

He served as a member of President Reagan's Economic Policy Advisory Board during 1981. During 1988, he received the Presidential Medal of Freedom and the National Medal of Science. He said that he was a libertarian philosophically, but a member of the U.S. Republican Party for the sake of "expediency" ("I am a libertarian with a small 'l' and a Republican with a capital 'R.' And I am a Republican with a capital 'R' on grounds of expediency, not on principle.") But, he said, "I think the term classical liberal is also equally applicable. I don't really care very much what I'm called. I'm much more interested in having people thinking about the ideas, rather than the person."

Friedman was supportive of the state provision of some public goods that private businesses are not considered as being able to provide. However, he argued that many of the services performed by government could be performed better by the private sector. Above all, if some public goods are provided by the state, he believed that they should not be a legal monopoly where private competition is prohibited. For, example, in response to the United States Post Office's legal monopoly of mail, he said

There is no way to justify our present public monopoly of the post office. It may be argued that the carrying of mail is a technical monopoly and that a government monopoly is the least of evils. Along these lines, one could perhaps justify a government post office, but not the present law, which makes it illegal for anybody else to carry the mail. If the delivery of mail is a technical monopoly, no one else will be able to succeed in competition with the government. If it is not, there is no reason why the government should be engaged in it. The only way to find out is to leave other people free to enter.

—Milton Friedman, Friedman, Milton & Rose D. Capitalism and Freedom, University of Chicago Press, 1982, 29

Friedman made newspaper headlines by proposing a negative income tax to replace the existing welfare system, and then opposing a bill to implement it because the bill merely proposed to supplement the existing system rather than replace it.

During 2005, Friedman and more than 500 other economists advocated discussions regarding the economic benefits of the legalization of marijuana.

Michael Walker of the Fraser Institute and Friedman hosted a series of conferences from 1986 to 1994. The goal was to create a clear definition of economic freedom and a method for measuring it. Eventually this resulted in the first report on worldwide economic freedom, Economic Freedom in the World. This annual report has since provided data for numerous peer - reviewed studies and has influenced policy in several nations.

Along with sixteen other distinguished economists he opposed the Copyright Term Extension Act and filed an amicus brief in Eldred v. Ashcroft. He supported the inclusion of the word "no-brainer" in the brief.

Friedman argued for stronger basic legal (constitutional) protection of economic rights and freedoms in order to further promote industrial - commercial growth and prosperity and buttress democracy and freedom and the rule of law generally in society.

Friedman allowed the Cato Institute to use his name for its biannual Milton Friedman Prize for Advancing Liberty beginning in 2001. A Friedman Prize was given to the late British economist Peter Bauer during 2002, Peruvian economist Hernando de Soto during 2004, Mart Laar, former Estonian Prime Minister during 2006 and a young Venezuelan student Yon Goicoechea during 2008. His wife Rose, sister of Aaron Director, with whom he initiated the Friedman Foundation for Educational Choice, served on the international selection committee. Friedman was also a recipient of the Nobel Memorial Prize in Economic Sciences.

Milton Friedman influenced the thinking of Alan Walters and Patrick Minford, two of Margaret Thatcher's main macroeconomic advisers.

During the financial crisis of 2007 – 2010, several Keynesian economists such as James Galbraith and Joseph Stiglitz blamed the free market philosophy of Friedman and the Chicago school for the economic turmoil. In response to these criticisms, University of Chicago Magazine noted that Chicago's Rajan, Thaler, and Vishney warned the US government that regulations are needed and, “The Chicago School never said we wanted blind deregulation ... We should really ask who were the people in 2000 who decided markets don’t need regulating. Those were not Chicago economists. Some of them were Clinton officials, and some of them are now advising Obama” and noted other examples to claim that their economists are often mischaracterized regarding their views on deregulation.

After Friedman's death, Keynesian Nobel laureate Paul Krugman, while regarding Friedman as a "great economist and a great man," criticized him during 2007 by writing that "he slipped all too easily into claiming both that markets always work and that only markets work. It's extremely hard to find cases in which Friedman acknowledged the possibility that markets could go wrong, or that government intervention could serve a useful purpose." National Bureau of Economic Research economist and Friedman's long time colleague and co-author Anna Schwartz, and Edward Nelson of the Centre for Economic Policy Research responded that Krugman "doubletalks throughout his essay," and asked "How can he say Friedman was a great economist and a great man, if he believes Friedman to have been intellectually dishonest?"

During 1971, libertarian economist Murray Rothbard criticized Friedman's efforts to make the government more efficient as detrimental to individual liberty. He concluded that "And so, as we examine Milton Friedman’s credentials to be the leader of free - market economics, we arrive at the chilling conclusion that it is difficult to consider him a free - market economist at all." Friedman's position on governmental control of money changed since 1971 when this criticism was made. In a 1995 interview in Reason magazine he said the "difference between me and people like Murray Rothbard is that, though I want to know what my ideal is, I think I also have to be willing to discuss changes that are less than ideal so long as they point me in that direction." He said he actually would "like to abolish the Fed," and points out that when he has written about the Fed it is simply his recommendations of how it should be run given that it exists.

Klein's critique of Friedman is disputed by economists, including Tyler Cowen and Don Boudreaux. Johan Norberg, a senior fellow at the libertarian think tank Cato Institute, accused Klein of distorting quotations from Friedman's writings and of "link[ing] him to Augusto Pinochet's brutal military dictatorship in Chile in the 1970s."

According to a 2007 article in Commentary magazine, his "parents were moderately observant [Jews], but Friedman, after an intense burst of childhood piety, rejected religion altogether."

Friedman wrote extensively of his life and experiences, especially in 1998 in his memoirs with his wife Rose, titled Two Lucky People. He died of heart failure at the age of 94 years in San Francisco on November 16, 2006. He was survived by his wife (who died on August 18, 2009) and their two children, David, who is a philosopher and anarcho - capitalist economist, and Janet. David's son, Patri Friedman, is the executive director of the Seasteading Institute.