Inflation is a phenomenon that occurs when the value of a given unit of currency becomes debased in some way, and prices then rise to offset the currency’s loss in value. The standard definition of inflation is given in terms of rising prices rather than falling currency value, but that’s misleading. The value of goods and service don’t increase so much as the currency’s value relative to those goods and services decreases, so inflation is more of a monetary phenomenon than a market-price phenomenon.
The more the currency loses value, the higher prices denominated in that currency rise. The classical example of hyperinflation is the 1921-1924 hyperinflation in Weimar-era Germany, though in modern times Zimbabwe’s currency has undergone the same radical devaluation.
What causes a currency to become devalued? There are many causes. With specie currency like gold and silver coins, debasement is usually physical — in former times coins were “shaved” or “clipped” or adulterated with baser metals. The clippings could then be melted down and recast into new coins, but the clipped coin could still be passed off at full value (until the merchants got wise and started weighing and/or assaying the coins). This is why coins began to have milled edges — it made the practice of clipping easier to spot. A variant of the “shaving” debasement strategy is one carried out by the treasury or mint itself: reducing the amount of gold or silver in a coin, but leaving the face-value of the coin the same. This happened often to the Roman denarii — as the Imperial stocks of silver bullion waned, each coin was reduced in weight but mandated to retain the same value. (In modern fiat-money times, coins are generally manufactured out of base metals like nickel, tin, and zinc, but even so, the value of the metal is sometimes still higher than the face-value of the coin.)
In a fiat money regime, debasement is usually the result of creating too much currency for the economy to absorb. If the money supply exceeds some thresh-hold (it’s very complicated to figure out exactly what that thresh-hold is), you have more units of currency chasing the same amount of goods and services — which means that the real unit value of the currency will drop and prices will go up.
Another way a fiat currency can become debased is to arbitrarily re-value your currency relative to the market, or relative to other currencies. If an issuing authority declares the value of a quatloo to be three quatloos to a dollar, even if the market is trading at five quatloos to a dollar, the currency will be debased because it’s not actually worth what the issuing authority says it is. Prices go up, and the government usually responds by implementing price-controls, and in turn the goods and services simply become unobtainable at any price because producers won’t continue to produce at a loss.
No good or service has an absolute value. The value of a good or service is what someone is willing to pay for it. Currency is a specialized good, and is subject to the same law. If the stock of currency grows faster than the value represented by that currency in the wider economy, the currency is in an inflationary state.
Monty, “Inflation, Deflation, and Monetary Policy”, Ace of Spades HQ, 2014-07-11.
May 18, 2015
QotD: Inflation
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