The Economics Nobel Behind Every Fed Rate Decision

The next time the Federal Reserve moves its policy rate, one input in the decision will come from a model built on the work of two Americans who won the economics Nobel on October 12, 2026. That is not a guess about the Fed. It is close to what the Royal Swedish Academy of Sciences wrote when it gave the prize to Robert E. Hall of Stanford and Michael Woodford of Columbia, "for microeconomic foundations of macroeconomic stabilisation."

The phrase sounds like it was designed to end conversations. The idea behind it is simple, and it explains why central bankers now spend so much time talking.

The problem the 1970s exposed

Stabilisation policy is the job of evening out booms and busts: cut interest rates or widen the budget deficit in a recession, do the opposite when the economy overheats. The approach goes back almost a century to John Maynard Keynes. For decades it ran on statistical relationships between big aggregates, such as the Phillips curve linking low unemployment to higher inflation, or the assumption that consumption simply tracks disposable income.

Then came the oil crises of the 1970s. Inflation rose while unemployment rose too, and the link between income and spending looked far less reliable than the models assumed. In the Academy's own summary, policy delivered too much stimulus at the wrong time, and the West lived through a decade of low growth, high unemployment and high inflation. Many economists concluded that stabilisation policy did more harm than good.

The critique that gained ground, associated with Robert Lucas, the 1995 laureate, was that the old models treated those aggregate relationships as fixed. They are not fixed. They are the sum of millions of decisions by households and firms, and those decisions change when people expect policy to change.

Hall's trick: stop trying to predict spending

Theory already said that households spend based on what they expect to earn in the future, not just on this month's paycheck. The trouble was that nobody can observe expectations. Researchers kept hunting for indicators that would forecast consumption, and kept failing.

Hall flipped the question. If spending reflects everything a household expects, then spending itself is the best gauge of those expectations, and it should only change when genuinely new information arrives. New information is by definition unpredictable. So, if the theory is right, changes in consumption should be impossible to forecast. Hall tested that in a 1978 article and found that no variable did much to predict them.

The benchmark turned out to be as useful as the result. Any predictable change in spending had to come from people the theory did not fit, such as households that cannot borrow or have no savings. In a 1982 paper with Fredric Mishkin, Hall used household microdata and found that around 80% of households behaved in line with the theory, while the rest lived hand to mouth. That split between forward looking households and paycheck to paycheck households is now built into the models central banks use.

Hall's insight: if you could predict a change in spending, it would not be news. And only news moves spending.

Woodford's model: interest rates and expectations

Woodford pulled the pieces together. His 2003 book laid out a complete New Keynesian model in three equations, which the Academy calls the prototype for all the models that followed. It is meant to work as a laboratory: what happens to output and inflation if the rate is cut, and by how much should it rise to stabilise prices?

Three ideas in it matter for anyone with a mortgage or a savings account. First, consumption depends on the interest rate relative to a neutral rate that neither stimulates nor slows spending, a concept Woodford took from the Swedish economist Knut Wicksell. Central banks steer the economy through rates, not through the quantity of money. Second, firms cannot reset prices constantly, so prices are sticky, and when a firm does change a price it looks ahead to what it expects competitors and costs to do. Third, inflation responds to the output gap, Woodford's measure of how far the economy runs above or below its efficient level.

Put those together and communication becomes a policy tool. If firms set prices based on where they expect rates to go, a central bank that is credible and transparent about its plans can move the economy before it moves a single rate. That is the theoretical root of forward guidance, press conferences and published projections.

The 1970s, solved differently

The model also changes the answer to a supply shock, such as an energy price spike that lowers how much the economy can produce. If demand stays put while potential output falls, the output gap turns positive even though nobody is spending more. Woodford's framework then recommends cooling the economy, for example with higher rates, to keep inflation from running away. The Academy credits that insight with helping policymakers respond to recent supply shocks more effectively than in the 1970s, and notes that the pandemic and the recent energy crises did not leave the same long scars on growth and inflation.

Why this prize matters outside economics departments

The 12 million Swedish kronor will be split equally between the two laureates. The bigger payout went out decades ago, to anyone who did not live through a repeat of the 1970s. The models are not neutral oracles. They are only as good as their assumptions about how people form expectations, and those assumptions get tested hardest exactly when the world changes fastest. A model that tells central banks to talk more works only as long as people keep believing what central banks say. That credibility, more than any equation, is the real asset Hall and Woodford helped create, and it is the one that can be spent down fastest.