Monetarism: An Interpretation and an Assessment
4 02 2008Laidler, David. “Monetarism: An Interpretation and an Assessment,” Economic Journal, 1981.
Laidler begins by defining four key characteristics of monetarism: 1) it employs the quantity theory to macroeconomic analysis in two senses– Friedman’s theory of the demand for money and the traditional theory of money supply and price level; 2) it rules out any long-run trade-off between price level and real income, using the expectations augmented Phillips Curve; 3) it presents a monetary approach to balance of payments and exchange rate theory; and 4) it discourages activist stabilization policy and price controls, while favoring monetary policy aimed at long term price stability.
The Quantity Theory of Money
Often viewed a “development” of Keynes’s capital theoretic approach to monetary theory, Friedman’s theory of the demand for money highlighted some key differences between the two schools of thought. While Keynes had treated money as simply a financial asset, Friedman conceptualized money as a durable good to which the permanent income hypothesis of consumption could be applied. He also recognized inflation as a distinct rate of return on money and proposed a well-determined functional relationship between expected inflation and the demand for money– a relationship which Keynes had denied. Finally, perhaps the most widely debated element of Friedman’s argument was his assertion that the demand for money and the velocity of money were relatively stable. This assertion is one of the differentiating arguments separating monetarists from classical and neoclassical economists. Though debate continues, empirical evidence has shown that demand for money function has shifted as institutional frameworks have evolved.
Another factor that distinguishes monetarists from their classical predecessors is their strong emphasis on the role of the quantity of money in determining prices. Employing quantity theory, monetarists have more clearly declared the money supply to be the main cause of income fluctuations, partly due to their strong belief in a stable velocity of money. Classical economists had often questioned the constancy of this variable.
With respect to the IS-LM model, there are two ways this model can demonstrate monetarist results. In the underemployment form, if the demand for money is insensitive to interest rates then the quantity of money is the key determinant of real income. In the full employment form, the quantity of money must be the key determinant of money wages because the economy is at maximum output and the velocity of money is held constant.
The Expectations Augmented Phillips Curve
Monetarists have long doubted the trade-off between inflation and unemployment, believing instead in the stability of the private sector which tends to operate near full employment. For a while the Phillips Curve was seen as providing an alternative explanation of inflation, but in actuality, the expectations-augmented Phillips Curve was declared the missing equation in the monetarist model.
In the early 1970s, two extreme views of this expectations-augmented curve existed. At one extreme, it was believed that monetary policies only impacted real income and prices were determined by external factors. At the other extreme, most monetarists believed that inflation was low in a depressed economy and high in an expanded one. However, this trade-off between inflation and deviations of output from that of full employment were only temporary and vanished in the long-run. Keynesians criticized the equation for failing to explicitly define other factors that impact inflation, all of which were represented by the variable v.
Since then, there has been general agreement that no significant trade-off exists between output and inflation in the long-run. However, how long it takes for an economy to converge at long-run equilibrium is still highly disputed. In addition, greater consensus has been reached on the importance of external factors on inflation in the short-run, while Keynesians now recognize long-run inflation as a monetary phenomenon. However, debate continues over the theoretical basis for the Phillips Curve.
Phelps presented one theoretical approach, defining the expectations augmented Phillips Curve as an aggregate supply curve. To say this implies that the voluntary choices of individuals determine fluctuations in output and employment in response to prices. As we all know, choices are based on inaccurate expectations, indicating that unemployment is caused by incomplete information. Thus, the way that expectations are formed play an important role in economic well-being. If we apply the “rational expectations” hypothesis to supplement the aggregate supply curve interpretation, a person will obtain information until the marginal cost of doing so equals the marginal benefit. Over time, expectations will not be wrong systematically, thus causing their distribution to reflect the correct expectations model.
The Monetary Approach to Balance of Payment and Exchange Rate Analysis
Until 1971, the world operated on a fixed exchange rate regime against the U.S. dollar. The monetary approach to the balance of payments suggest two reasons why an inverse relationship existed between inflation and unemployment in Britain. Firstly, as long as fixed exchange rates were maintained, prices of tradeable goods sold domestically were determined by world markets, thus the long run behavior of prices depended on that of world prices. When this gets incorporated into inflation expectations, if world prices are stable, so will expectations. Secondly, high levels of demand are associated with high rates of domestic credit expansion, which generate balance of payments problems. If exchange rates were allowed to float, the country’s balance of payments deficit would likely be replaced with inflationary pressure. This second point became less valid after most of the world switched to floating exchange rates after 1971. However even before the switch to floating exchange rates, monetarists agreed that flexible exchange rate regimes were a pre-requisite for achieving monetarist goals of price stability.
Policy Issues
Just like the monetarists of the 1950s, contemporary monetarists seek monetary policy that adheres to some simple rule under which monetary aggregates do not react to short-run fluctuations. They also feel that fiscal policy should focus on resource allocation and distribution of income rather than on activist stabilization. Many argue that it is one thing to say that policy can systematically influence output and employment in the short-run, but it is another to say that policymakers know how to use their tools to do this. While we can always count on markets to clear and expectations to be rational, we cannot count on our own knowledge of the economy to make safe stabilization policy.
Monetarists also fervently oppose wage and price controls which have failed to be an effective alternative to monetary policy in curbing inflation. In an open economy, such controls cannot have a long term impact on the price level under either fixed or floating exchange rates. Under fixed exchange rates, prices cannot be controlled by domestic policy, while under floating rates, exchange rates and world prices cannot be regulated separately.
Questions
What are the determinants of the velocity of money? (The article mentioned inflation as one, but what are the others?)
Can someone explain how the Phillips Curve can act as an aggregate supply function?
The article implied that one big difference between monetarists and the classicals was the belief that the velocity of money was constant. Aren’t their viewpoints the same? Or did the classicals believe that velocity is constant, while monetarists believe that it is stable? If so, what exactly is the difference between “constant” and “stable”? (I know this is kind of a weird question, but it confused me a ton!)
Categories : e488-monetarism





