Governments have displayed serious deficiencies in their ability to handle stabilization policy. Political leaders often lack economic information and understanding, and their economic advisers find it difficult to explain the economic situation to them and to apprise them of the relevant tools. There are also a variety of political inhibitions against taking action. One consequence is that what is designed to be a countercyclical policy becomes a procyclical one; instead of stabilizing the economy it tends to destabilize it. The postwar experience in Britain is held by some to demonstrate the deficiencies of government in handling monetary and fiscal policy. In time of boom the government often followed an expansionary course; when a balance-of-payments crisis developed it then took restrictive action—too late—and pushed the economy into deeper recession than would otherwise have occurred. On the basis of this experience, some economists have argued that a policy that did not attempt to counter the short-run swings in the economy would have been more successful in achieving stabilization. They maintain that the authorities should concentrate on letting the volume of money and credit increase steadily at a rate dictated by the long-term growth trend of the economy. Those who hold this view believe that capitalist economies are inherently stable, that crises are usually the result of bad policies on the part of the public authorities. Most economists do not share their optimism as to the stability of the economy if left alone; they continue to believe that governments must seek better tools for the purpose of short-run stabilization.

The application of full-employment policies after World War II was made more difficult by the fact that the postwar situation was radically different from that of the 1930s, when much of the policy thinking had been done. Most governments and their advisers expected a depression after the war, but it never materialized. One explanation is that the reallocation of resources from military to civilian uses proceeded more smoothly than expected. Another explanation is that the consumers spent a larger part of their disposable income than they had been observed to do in the 1930s, upsetting some of the statistical projections based on empirical data from those years. A third explanation, which applies perhaps to the years after 1948, was the Cold War between the United States and the Soviet Union, which raised defense spending in many countries.

The period of the late 1940s and early 1950s proved to be characterized by tendencies to inflation rather than to unemployment. Governments were slow to realize this and to shift their emphasis from employment-creating policies to anti-inflationary policies. The fact that governments had accepted, to a large extent, the belief that monetary policy was not very important made it difficult for them to combat the tendencies to inflation. In most countries a passive, even expansionary, monetary policy was in effect; interest rates were kept down and the supply of money was allowed to grow faster than would have been consistent with stable prices. Inflationary tendencies were further stimulated by the Korean War and the great increases in raw material prices that accompanied it.

During the 1950s several important developments influenced the attitudes of governments toward stabilization policy. Most of the economic controls engendered by the war were removed, particularly in international trade and finance. The western European countries were in a period of rapid economic growth. With the removal of direct controls on prices, imports, and building investment, governments began to develop and refine the tools of monetary and fiscal policy. In most countries the passive attitude toward monetary policy disappeared during the early 1950s; there was increased interest in more flexible monetary management. Interest also grew in developing a systematic fiscal policy that would offset the cyclical swings in production and employment. The most energetic attempts to devise a countercyclical fiscal policy were made in Britain and Sweden. Other European countries and the United States placed more reliance on monetary policy.

In the United States, a contributing factor in the revival of monetary policy was a theoretical reformulation that took place among monetary and banking experts. This was the so-called availability theory of credit; it held that monetary policy had its effect on spending not only directly through interest rates but also by restricting the general availability of credit and liquid funds. It was argued that even rather small changes in the rate of interest for government securities could have a considerable impact on the supply of private credit; if the supply diminished, this would induce banks and other financial institutions to stiffen their credit standards and ration credit to their customers; this in turn, it was argued, would tend to curb investment and thus have a braking effect on the economy. Similar ideas were at work in other countries, but with more emphasis on limiting the availability of credit through credit rationing, loan ceilings, control of private bond issues, regulation of installment credit for the purchase of durable consumer goods, and so on.

Serious attempts have been made to put a countercyclical monetary policy into practice in most advanced industrialized countries since the middle of the 1950s. In some, such as the United States, the emphasis has been, as suggested above, on changes in the interest rate and in the supply of money and credit; in others, such as France, Italy, and Japan, the emphasis has been on the rationing of credit by the central bank.

Fiscal policy has found less use than monetary policy in efforts to control cyclical fluctuations in the economy. It has been most favoured in Britain, the Scandinavian countries, and the Netherlands. There are specific situations in which fiscal measures have been used to stimulate the economy in other countries, as in Belgium and West Germany during the recessions of 1958 and 1962. Another example is the postponement of certain military expenditures in the United States as an anti-inflationary measure during the boom of the mid-1950s, and, most notably, the tax cuts passed by Congress in 1964 and 1981 as a stimulus to economic expansion. Several countries have taken restrictive fiscal actions to overcome balance-of-payments crises, including France and Finland on various occasions. During the later 20th century there was an increasing tendency to employ fiscal policies in the short run, partly in order to assist monetary policy in solving cyclical problems.