But understanding the labor market — and the process by which workers and jobs come together and separate — is critical to devising an effective monetary policy. The financial crisis has led to continuing high unemployment. The Fed has to properly assess the nature of that unemployment to be able to lower it as much as possible while avoiding inflation. If much of the unemployment is related to the business cycle — caused by a lack of adequate demand — the Fed can act to reduce it without touching off inflation. If instead the unemployment is primarily structural — caused by mismatches between the skills that companies need and the skills that workers have — aggressive Fed action to reduce it could be misguided.

In my Nobel acceptance speech in December, I discussed in detail the patterns of hiring in the American economy, and concluded that structural unemployment and issues of mismatch were not important in the slow recovery we have been experiencing, and thus not a reason to stop an accommodative monetary policy — a policy of keeping short-term interest rates exceptionally low and buying Treasury securities to keep long-term rates down. Analysis of the labor market is in fact central to monetary policy.

Senator Shelby also questioned my qualifications, asking: “Does Dr. Diamond have any experience in crisis management? No.” In addition to setting monetary policy in light of a proper understanding of unemployment, the Fed is responsible for avoiding banking crises, not just trying to mop up afterward.

Among the issues being debated now is how much we should increase capital requirements for banks. Selecting the proper size of the increase requires a balance between reducing the risk of a future crisis and ensuring the effective functioning of financial firms in ordinary times. My experience analyzing the properties of capital markets and how economic risks are and should be shared is directly relevant for designing policies to reduce the risk of future banking crises.

Instead of going to the Fed, however, I will go about my congenial professional existence as a professor at M.I.T., where I have taught and researched since 1966, and I will take advantage of some of the many opportunities that come to a Nobel laureate. So don’t worry about me.