What gives a dollar bill its value? - Doug Levinson

3,664,044 views ・ 2014-06-23

TED-Ed


Please double-click on the English subtitles below to play the video.

00:06
If you tried to pay for something with a piece of paper,
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you might run into some trouble.
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Unless, of course, the piece of paper was a hundred dollar bill.
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But what is it that makes that bill so much more interesting and valuable
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than other pieces of paper?
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After all, there's not much you can do with it.
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You can't eat it.
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You can't build things with it.
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And burning it is actually illegal.
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So what's the big deal?
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Of course, you probably know the answer.
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A hundred dollar bill is printed by the government
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and designated as official currency,
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while other pieces of paper are not.
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But that's just what makes them legal.
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What makes a hundred dollar bill valuable, on the other hand,
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is how many or few of them are around.
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Throughout history, most currency, including the US dollar,
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was linked to valuable commodities
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and the amount of it in circulation
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depended on a government's gold or silver reserves.
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But after the US abolished this system in 1971,
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the dollar became what is known as fiat money,
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meaning not linked to any external resource
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but relying instead solely on government policy
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to decide how much currency to print.
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Which branch of our government sets this policy?
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The Executive, the Legislative, or the Judicial?
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The surprising answer is: none of the above!
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In fact, monetary policy is set by an independent Federal Reserve System,
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or the Fed,
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made up of 12 regional banks in major cities around the country.
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Its board of governors,
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which is appointed by the president and confirmed by the Senate,
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reports to Congress,
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and all the Fed's profit goes into the US Treasury.
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But to keep the Fed from being influenced
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by the day-to-day vicissitudes of politics,
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it is not under the direct control of any branch of government.
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Why doesn't the Fed just decide to print infinite hundred dollar bills
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to make everyone happy and rich?
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Well, because then the bills wouldn't be worth anything.
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Think about the purpose of currency,
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which is to be exchanged for goods and services.
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If the total amount of currency in circulation
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increases faster than the total value of goods and services in the economy,
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then each individual piece will be able
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to buy a smaller portion of those things than before.
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This is called inflation.
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On the other hand,
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if the money supply remains the same,
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while more goods and services are produced,
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each dollar's value would increase
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in a process known as deflation.
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So which is worse?
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Too much inflation
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means that the money in your wallet today will be worth less tomorrow,
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making you want to spend it right away.
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While this would stimulate business, it would also encourage overconsumption,
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or hoarding commodities, like food and fuel,
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raising their prices
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and leading to consumer shortages and even more inflation.
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But deflation would make people want to hold onto their money,
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and a decrease in consumer spending
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would reduce business profits,
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leading to more unemployment and a further decrease in spending,
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causing the economy to keep shrinking.
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So most economists believe that while too much of either is dangerous,
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a small, consistent amount of inflation is necessary to encourage economic growth.
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The Fed uses vast amounts of economic data
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to determine how much currency should be in circulation,
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including previous rates of inflation,
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international trends, and the unemployment rate.
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Like in the story of Goldilocks,
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they need to get the numbers just right
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in order to stimulate growth and keep people employed,
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without letting inflation reach disruptive levels.
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The Fed not only determines
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how much that paper in your wallet is worth
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but also your chances of getting or keeping the job
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where you earn it.
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