Deflation: Making Sure "It" Doesn't Happen Here
Since World War II, inflation--the apparently inexorable rise in the prices of goods and services--has been the bane of central bankers. Economists of various stripes have argued that inflation is the inevitable result of (pick your favorite) the abandonment of metallic monetary standards, a lack of fiscal discipline, shocks to the price of oil and other commodities, struggles over the distribution of income, excessive money creation, self-confirming inflation expectations, an "inflation bias" in the policies of central banks, and still others. Despite widespread "inflation pessimism," however, during the 1980s and 1990s most industrial-country central banks were able to cage, if not entirely tame, the inflation dragon. Although a number of factors converged to make this happy outcome possible, an essential element was the heightened understanding by central bankers and, equally as important, by political leaders and the public at large of the very high costs of allowing the economy to stray too far from price stability...
As I have mentioned, some observers have concluded that when the central bank's policy rate falls to zero--its practical minimum--monetary policy loses its ability to further stimulate aggregate demand and the economy. At a broad conceptual level, and in my view in practice as well, this conclusion is clearly mistaken. Indeed, under a fiat (that is, paper) money system, a government (in practice, the central bank in cooperation with other agencies) should always be able to generate increased nominal spending and inflation, even when the short-term nominal interest rate is at zero.
The conclusion that deflation is always reversible under a fiat money system follows from basic economic reasoning. A little parable may prove useful: Today an ounce of gold sells for $300, more or less. Now suppose that a modern alchemist solves his subject's oldest problem by finding a way to produce unlimited amounts of new gold at essentially no cost. Moreover, his invention is widely publicized and scientifically verified, and he announces his intention to begin massive production of gold within days. What would happen to the price of gold? Presumably, the potentially unlimited supply of cheap gold would cause the market price of gold to plummet. Indeed, if the market for gold is to any degree efficient, the price of gold would collapse immediately after the announcement of the invention, before the alchemist had produced and marketed a single ounce of yellow metal.
What has this got to do with monetary policy? Like gold, U.S. dollars have value only to the extent that they are strictly limited in supply. But the U.S. government has a technology, called a printing press (or, today, its electronic equivalent), that allows it to produce as many U.S. dollars as it wishes at essentially no cost. By increasing the number of U.S. dollars in circulation, or even by credibly threatening to do so, the U.S. government can also reduce the value of a dollar in terms of goods and services, which is equivalent to raising the prices in dollars of those goods and services. We conclude that, under a paper-money system, a determined government can always generate higher spending and hence positive inflation...