2026 Nobelist legacy for central banks

In an analytical report, the Financial Times has examined the role of Michael Woodford, winner of the 2026 Nobel Prize in Economics, in the evolution of macroeconomic theories and monetary policy and has shown why the validity of the central bank's promises about future policies is as important as the current interest rate decisions. The post Legacy Nobelist 2026 for Central Banks appeared first on Safir Arjan.

According to Ambassador Arjan, Michael Woodford has received the 2026 Nobel Prize in Economics jointly with Robert Hall, a prominent economist in the field of macroeconomics.

Woodford's achievements are related to examining the implications of new macroeconomic theories for monetary policy makers; Theories that try to explain the mechanism of economic performance based on the behavior and decisions of firms, labor and consumers.

This approach was previously developed with the research of Nobel laureates in economics, including Robert Lucas, Edward Prescott, Finn Kidland, and Thomas Sargent. هدف این اقتصاددانان، ساخت مدل‌های اقتصاد کلان بر پایه مبانی خرد اقتصادی بود؛ This means that the activities, decisions and limitations faced by individuals and companies are explicitly included in the models.

According to them, otherwise, the policy recommendations obtained from the macroeconomic models could be faced with "Lucas criticism". According to this criticism, the relationships between macroeconomic variables such as consumption, income and inflation may change if the behavior of monetary or financial policymakers changes, and as a result, the policy designed based on past relationships will no longer be effective.

In these models, individuals and firms were usually assumed to be rational, have the necessary information about the functioning of the economy, and make decisions that maximize their interests. Although these assumptions do not correspond well with human behavior in the real world, in the author's view, such macro-scale simplifications have been useful for the development of economic models.

چسبندگی قیمت‌ها و نقش سیاست‌گذاری اقتصادی

مشارکت‌های اولیه وودفورد با هدف واقع‌بینانه‌تر کردن این مدل‌ها صورت گرفت. One of his most important reforms was introducing the concept of "price stickiness"; That is, the assumption that prices and wages do not immediately and completely react to economic changes.

This assumption was consistent with the results of surveys examining how and when prices change. More importantly, price stickiness had the consequence that economic booms or busts could be partly caused by inappropriate monetary or fiscal policies.

Based on this, monetary and financial policies can affect economic fluctuations and reduce their intensity and instability; A view that has long been supported by a section of economists, especially the followers of the ideas of John Maynard Keynes.

The next step was to examine the implications of these macroeconomic models for central bank policymaking. Until then, in the researches of central banks, it was usually assumed that the interest rate should be determined in such a way that the deviation of inflation from the target and the deviation of production from its long-term trend are reduced as much as possible.

Researchers such as Dale Henderson, Warren McKibben and John Taylor, known for the Taylor rule, had shown that interest rates should change by a certain amount in response to these deviations.

However, Woodford and other researchers, by revising this approach and inspired by the older works of Frank Ramsey, one of Keynes's contemporary economists, raised a different question: if the policymaker is to make a decision that is favorable to the people in the economic model, what policy should he choose?

The result of these investigations, of course, relying on a set of strong assumptions, was that the interest rate should be set in such a way that the deviation of inflation from the target and the deviation of production from its trend are minimized; The same goals that governments and central banks have been pursuing for a long time.

In his comprehensive book Interest and Prices, published in 2003, Woodford compiled these findings and extended the basic model in several ways. He explored what would happen if wages were as sticky as prices, or if prices and wages adjusted based on the current rate of inflation. Also, the slow reaction of consumption and investment to economic changes, which was also observed in real data, was considered in this framework.

These reforms made the models somewhat closer to reality, but according to the author, despite assumptions such as the sameness of consumers and companies and the rationality and optimality of all their decisions, the level of realism of these models was still limited.

The title of Woodford's book is reminiscent of Nat Wicksell's original work in 1898 and possibly a reference to Don Patinkin's 1956 book Money, Interest and Prices. Removing the word "money" from the title of Woodford's book refers to one of the features of his model; The assumption that to understand the effects of the central bank's policy, it is enough to know the interest rate set by it.

When the interest rate reaches zero

This issue became more important after the financial crisis of 2008; When central banks cut their policy rates to near zero and were faced with the question of what else to do after interest rates reached this level.

Some central banks, including the Bank of England, despite using the works of Woodford and other economists, believed that if it is no longer possible to reduce the interest rate, increasing the monetary base of the central bank could be the next solution.

However, the results of economic models and Japan's experience in trying to stimulate the economy, after the interest rate reached zero more than a decade ago, showed that a further increase in the money supply would not necessarily have an economic effect.

In contrast, in a 2003 study, Woodford and Gotti Eggertson argued that central banks should lower expectations about future interest rates to stimulate the economy.

Because long-term interest rates, including corporate financing rates and long-term mortgage rates, depend on market expectations of future central bank rates, policymakers can help stimulate the economy even when current interest rates are at zero.

In other words, if the central bank can convince the market that future interest rates will remain low for a longer period of time than previously expected, financing conditions in the economy can be eased; Even if the current interest rate is no longer possible to decrease.

the credibility of the central bank's promises; The determining ring of monetary policy

However, there is one basic condition for the success of this policy: the market must trust the central bank's commitment to keep interest rates low in the future.

The main difficulty is that when interest rate expectations fall, the economy is stimulated, and fears of a recession and a general drop in price levels subside, the central bank may no longer have the incentive to stick to its previous promise.

For example, the members of the central bank's decision-making committee may change, or policymakers may no longer feel obligated to fulfill previous promises. They may even assume that they will never face the same situation again, and as a result, breaking a previous commitment will not cost them much.

If market participants assume from the beginning that the central bank will not stick to its promise in the future, why should they lower their interest rate expectations?

The distinction between the two approaches of "discretion" and "commitment" is an important part of Woodford's achievements in the field of monetary policy. In the discretionary approach, the policy maker makes a decision at any point in time based on the conditions of that time; But in the commitment-based approach, the decision-maker must pursue a policy that is consistent with the stated goals, not only today, but also in the future.

This issue became one of the important issues of monetary policy after the global financial crisis. Woodford's research showed that the problem of adhering to commitments exists even in central banks with independence and a clear legal mandate; Therefore, the independence of the central bank and setting clear goals for it are not enough to solve this problem.

The governments that designed the inflation targeting framework, and the central banks that implement it, often assume that as long as governments don't push monetary policy to win elections, the commitment problem is solved.

However, Woodford has explained in detail in his works that even in such circumstances, the issue of adhering to future obligations does not disappear; A topic that, according to the author, has sometimes been misunderstood or uncomfortable for some central bankers.

A lasting effect on central banks' policies

Woodford's influence on macroeconomics and central banking has been significant. Some central banks have applied his advice more broadly, while others have taken a more limited view of these teachings. Not all central banks have agreed with his views or fully understood them; However, his ideas have found an important place in monetary policy discussions.

The main achievement of this approach is that monetary policy cannot be limited to today's central bank's decision on interest rates. Expectations of economic actors from future decisions and their trust in policy makers' commitments also play a fundamental role in determining the effects of monetary policy.

From this point of view, the central bank's ability to manage expectations and maintain the credibility of announced policies can affect economic conditions even when conventional monetary policy tools have reached their limits.