Milton Friedman
Economist and Nobel laureate
Born 1912 • Passed away 2006
Argued that the money supply is central to inflation and championed a limited role for government in markets.
Biography
Milton Friedman, born in Brooklyn in 1912 to immigrant parents, became one of the most influential economists of the twentieth century and one of the most argued with. He took a degree at Rutgers in 1932, a master's at the University of Chicago in 1933 and a doctorate at Columbia in 1946, worked on statistics for the government during the war, and then taught at the University of Chicago from 1946 until 1977, where he was central to what became known as the Chicago school.
His technical work came first. A Theory of the Consumption Function, published in 1957, introduced the permanent income hypothesis: people base their spending on what they expect to earn over the long run rather than on this month's pay, which is why a one-off windfall or a temporary tax cut changes behaviour far less than a permanent change in income does. It reshaped how economists model household spending and it undercut a central assumption of the policy thinking of the time.
A Monetary History of the United States, written with Anna Schwartz and published in 1963, is the work he is most cited for. Its central and most contested chapter argues that the Great Depression was made far worse by the Federal Reserve, which allowed the money supply to contract sharply while banks failed, turning a serious downturn into a catastrophe. From that came monetarism: the position that sustained inflation is driven by money growing faster than output, and that because monetary policy works with long and variable lags, a central bank following a simple rule will do less damage than one reacting to events.
He also wrote for the public, in Capitalism and Freedom in 1962 and Free to Choose in 1980 with his wife Rose Friedman, and became a familiar figure on television. He received the Nobel Memorial Prize in Economic Sciences in 1976, and his arguments were closely associated with policy shifts in several countries during the following decade. He passed away in 2006.
Career timeline
- 1912Born in Brooklyn, New York.
- 1932Graduates from Rutgers University, followed by a master's at Chicago the next year.
- 1946Completes a doctorate at Columbia University and joins the University of Chicago faculty.
- 1957Publishes A Theory of the Consumption Function, introducing the permanent income hypothesis.
- 1962Publishes Capitalism and Freedom.
- 1963Publishes A Monetary History of the United States with Anna Schwartz.
- 1968Argues that there is no lasting trade-off between inflation and unemployment, before the 1970s appeared to confirm it.
- 1976Receives the Nobel Memorial Prize in Economic Sciences.
- 1980Publishes Free to Choose with Rose Friedman, alongside a television series.
- 2006Passes away in San Francisco.
Economic approach
He judged a theory by whether its predictions survive contact with data, not by whether its assumptions look realistic. That methodological position, argued explicitly in his early work, is why so much of his output is empirical history rather than pure theory, and it is also why his opponents attacked the data in A Monetary History rather than the reasoning built on it. A model, in his account, is a machine for producing testable predictions and nothing more.
The core substantive claim is that money matters more than the policy debates of his early career assumed. If the quantity of money grows persistently faster than the output of goods, prices rise; if it contracts sharply, the damage is severe and self-reinforcing. Both halves of that were unfashionable when he made them, and the second is the argument at the centre of his account of the Depression.
From this follows his preference for rules over discretion. Monetary policy affects the economy with lags that are both long and inconsistent, so a central bank responding to today's data is acting on a situation that will have changed by the time the effect arrives, and can easily amplify a cycle it meant to smooth. His proposed answer was a simple rule for steady money growth. Central banks did not adopt it, but the underlying argument, that predictable policy beats clever policy, moved the profession a long way.
Key ideas
Tap any idea to expand a plain-English explanation, why it matters, and where to learn more.
Inflation and the money supply
The monetarist position that sustained inflation comes from the quantity of money growing faster than the economy's output of goods and services.
It reframed inflation from a problem caused by unions, companies or oil prices into one connected to a variable that central banks actually control.
A one-off jump in the price of an imported good raises prices once, while money growing persistently faster than output raises them continuously.
Long and variable lags
The observation that a change in monetary policy affects the economy only after a delay, and that the delay is not the same each time.
It means a central bank reacting to current data is acting on conditions that will have moved by the time its action lands, which can worsen a cycle.
A rate rise intended to cool an overheating economy can arrive after the slowdown has already begun on its own.
The permanent income hypothesis
The finding that people spend according to what they expect to earn over the long run rather than according to their income this month.
It explains why temporary windfalls change behaviour much less than lasting changes in income, and it applies directly to household planning.
A one-off bonus is largely saved or used to pay down debt, while a permanent raise of the same annual value changes how someone lives.
Rules beat discretion
The argument that policy following a simple published rule produces better outcomes than policy adjusted case by case, because the lags make good timing impossible.
It applies well beyond central banking: a decision rule set in advance removes the moment of judgment where things usually go wrong.
An investor who contributes a set amount every month has made the decision once, rather than making it again during every frightening week.
The Depression as a policy failure
The argument, with Anna Schwartz, that the Federal Reserve turned a bad downturn into a catastrophe by letting the money supply contract as banks failed.
It changed what central banks believe their job is during a crisis, and it is visible in how they responded in 2008 and afterwards.
A wave of bank failures shrinks the money supply directly, and a central bank that does not offset it allows the contraction to feed itself.
Major contributions
- Introduced the permanent income hypothesis, which changed how economists model household spending.
- Wrote, with Anna Schwartz, the monetary history that reframed the Great Depression as a failure of central banking rather than an inevitability.
- Argued before the 1970s that there is no lasting trade-off between inflation and unemployment, a prediction that period appeared to bear out.
- Made the case for rules over discretion in monetary policy, which shaped the move toward transparent, predictable central banking.
- Brought economic argument to a general audience through books and television at a scale no academic economist had managed before.
Major successes
- Received the Nobel Memorial Prize in Economic Sciences in 1976 for his work on consumption, monetary history and stabilisation policy.
- Published A Monetary History of the United States with Anna Schwartz in 1963, still among the most cited works in economics.
- Predicted in 1968 that inflation and unemployment could rise together, before the following decade appeared to confirm it.
- Taught at the University of Chicago for three decades and helped build one of the most influential economics departments in the world.
- Reached a mass audience with Free to Choose in 1980 and its accompanying television series, an unusual crossover for an academic.
Important books
- A Theory of the Consumption Function1957
The technical work introducing the permanent income hypothesis. Dry, and the foundation of a great deal of later work on household spending.
- Capitalism and Freedom1962
His argument for a limited economic role for government, written for a general audience. The book that made him a public figure as well as an academic.
- A Monetary History of the United States1963
Written with Anna Schwartz. Nearly a century of monetary data, and the chapter on the Depression that reset what central banks think their job is.
- Free to Choose1980
Written with Rose Friedman alongside a television series. The most accessible statement of his position, and the most openly political of his books.
Influence on investors
Modern central banking is built on arguments he won. Inflation targeting, published policy frameworks, transparency about intentions and the conviction that a central bank must not let the money supply collapse in a crisis all descend from his work, and the response to the 2008 financial crisis is a fairly direct application of the Depression chapter in A Monetary History.
For ordinary savers his most useful idea is the least famous one. The permanent income hypothesis explains why a windfall should be treated differently from a raise, and the preference for rules over discretion is the same reasoning that makes an automatic monthly contribution work better than a decision taken fresh each month during a falling market.
Criticisms and debates
A balanced view includes the main criticisms and open debates, presented neutrally.
- Monetary targeting failed the practical test. Several central banks adopted money supply targets around 1980, found that the relationship between the money aggregates and nominal income had become unstable, and abandoned the targets within a few years.
- The account of the Great Depression in A Monetary History remains disputed. Other economists give much more weight to collapsing demand, the gold standard and the international transmission of the shock than to the money supply alone.
- Critics argue his methodological position, that unrealistic assumptions are acceptable if the predictions hold, licenses models that fit the past without describing any actual mechanism.
- His public advocacy tied his economics tightly to a political programme, and the popular versions of his arguments claim more than the research supports. Supporters and opponents alike often treat the two as one thing.
- The k-percent rule for steady money growth was never adopted by any major central bank, and the instability of money velocity is the main reason. The broader case for predictable policy survived; the specific proposal did not.
Lessons for investors
Plain-English takeaways. Context for learning, not advice to buy or sell anything.
- 1Sustained inflation is connected to how fast money grows relative to what an economy produces.
- 2Actions taken in response to today's news arrive late, which is an argument for rules decided in advance.
- 3A one-off windfall and a permanent raise should not change your spending in the same way.
- 4A prediction that held up before the event is worth more than an explanation constructed afterwards.
Notable quotes
“Inflation is always and everywhere a monetary phenomenon.”
Context: The summary of monetarism: sustained inflation comes from money growing faster than output. Economists have argued over the claim ever since.
“There is no such thing as a free lunch.”
“Nothing is so permanent as a temporary government program.”
Context: A line from a decades-long argument about the growth of government. It is a political claim about policy, not guidance for a household.
Frequently asked questions
Who was Milton Friedman?
Milton Friedman was an American economist, born in 1912, who taught at the University of Chicago and received the Nobel Memorial Prize in 1976. He is best known for monetarism, the permanent income hypothesis and A Monetary History of the United States. He passed away in 2006.
What is monetarism?
The position that the quantity of money in an economy is the main driver of sustained inflation, and that because monetary policy acts with long and unpredictable delays, a central bank following a simple rule will do less harm than one reacting to events.
What did he mean by long and variable lags?
That a change in monetary policy takes time to affect the economy, and the amount of time differs from one occasion to the next. A central bank acting on today's data is therefore treating a situation that will have changed before the effect arrives.
What is the permanent income hypothesis?
The finding that people spend based on the income they expect over the long run rather than what they happen to receive this month. It is why a one-off windfall is mostly saved while a permanent raise changes how someone lives.
What did Friedman say caused the Great Depression?
He argued with Anna Schwartz that the Federal Reserve turned a serious downturn into a catastrophe by allowing the money supply to contract sharply as banks failed. The claim reshaped central banking and is still disputed by other economists.
Did monetarism work in practice?
The broad insight about money and inflation was absorbed into mainstream economics, but the specific policy did not survive. Central banks that adopted money supply targets around 1980 abandoned them within a few years when the link to nominal income proved unstable.
What can a saver take from Friedman?
Two things: treat a windfall differently from a raise, because only one of them should change how you live, and set decision rules in advance, because policy made in the moment tends to arrive late and make matters worse.
Related quotes
Other people in the library writing on the same themes.
“It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest.”
Adam Smith“The long run is a misleading guide to current affairs. In the long run we are all dead.”
John Maynard Keynes“The curious task of economics is to demonstrate to men how little they really know about what they imagine they can design.”
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