The 2026 Sveriges Riksbank Prize in
Economic Sciences in Memory of Alfred Nobel was jointly awarded to American
economists Robert E. Hall, professor of economics and senior fellow at the Hoover Institution,
emeritus, and Michael Woodford, professor of political economy at Columbia
University, “for [their] microeconomic
foundations of macroeconomic stabilization”. Their “new macroeconomic models” –
two complementary bodies of work developed independently by these two that
together provided microeconomic foundations of the New Keynesian framework –
are known to “have significantly improved our ability to implement effective
stabilization policy”. The Chair of the Committee for the Prize in Economic
Sciences further observed that “with them, we are better equipped to deal with
shocks in the economy, such as energy
crises or sudden changes in how much households consume".
To better
appreciate the significance of these laureates’ work, let us travel back to the
1970s, a time when the oil shocks of 1973 led to stagflation— simultaneous high
inflation and high unemployment— challenging central banks of the US, UK, and
other developed nations. In an attempt to curb rising unemployment, the Fed,
operating under a traditional Keynesian framework, initially underreacted to
the inflationary threat by keeping monetary policy too accommodative—an attempt
to manage aggregate demand to curb rising unemployment—but this made inflation
harder to control. This led workers to demand higher wages to keep up with
rising costs. In turn, this led businesses to raise prices to cover higher
wages, ultimately creating a wage-price spiral. The result was deeply embedded
inflation which lasted longer—till Volker’s aggressive interest rate hikes in
the late 70s and early 80s.
It is during
this crisis that Dr Robert Hall revolutionized our understanding of how the economy
functions by publishing his seminal paper in 1978 titled “Stochastic Implications of the Life
Cycle–Permanent Income Hypothesis: Theory and Evidence,” examining consumer
behavior and studying how people decide how much to spend. Hall argued that
people make spending decisions based on their expectations of future income.
They change their spending when new information or unexpected shocks alter
those expectations. Since new information cannot be predicted, changes in
consumer spending cannot be reliably predicted either; thus he introduced the
“random walk” hypothesis of consumption. Contrary to older consumption
theories, Hall posited that consumption is independent of past income patterns
and should exhibit a martingale property, that is, that changes in consumption
are unpredictable and only respond to unexpected changes in future income. By
shifting the focus to micro-level, forward looking expectations, Dr Hall
presented the missing foundation for central banks to navigate shocks, anchor
inflation and implement effective macroeconomic stabilization policies. Simply
put, he made ‘expectations’
and ‘information’ central to the
understanding of how the economy functions.
Using Hall’s forward-looking consumer theory, Dr Woodford built a new
monetary policy framework, which he explained in detail in his 2003 book Interest and Prices: Foundations of a Theory
of Monetary Policy. He integrated
Hall’s rational expectations framework into a microeconomic analysis of how
firms adjust prices. It rests on four core pillars: one, microeconomic
‘sticky prices’ and menu costs: he argued that businesses do not continuously
or instantly change prices when broader demand or production costs change, for
such changes lead to microeconomic frictions such as physical costs, structural
adjustments, and managing buyer relationships. As prices are thus
microeconomically sticky, when aggregate demand falls, businesses will first
cut output and reduce hiring workers before lowering their prices. Two,
forward-looking price setting: Paralleling Hall’s consumer logic, Woodford
asserted that businesses do not just take cognizance of today’s raw material
costs or immediate demand when pricing the goods, but rather determine prices
based on rational expectations of future economic conditions. Three, the new
Keynesian Phillips Curve: this mathematically synthesized curve based on
microeconomic pricing behaviors states that today’s inflation is a direct
function of expected future inflation and real marginal costs; and four,
strategic complementarity and relative prices: Woodford emphasizes that pricing
decisions are highly interdependent; for instance, if a firm increases its price
while its competitors do not, it loses its market share.
Thus, by integrating Hall’s forward-looking consumer theory, Woodford
proposed the New Keynesian stabilization framework, which asserts that a
central bank’s most potent weapon is not the physical money supply that it
prints, but its ability to manage public expectations. Indeed, as households
and price-setting businesses are always looking ahead while making decisions,
‘forward guidance’ has become a structural policy tool for central banks to
influence public spending, borrowing, and pricing decisions of businesses
today. He has also shown in his book how the tools of the New Keynesian
framework can be used to design an optimal inflation-targeting regime—one that
balances stabilzation goals with the pursuit of price stability that rests on
an explicit welfare analysis.
By reconstructing traditional Keynesian frameworks to reflect the
realities of forward-looking human behavior, Hall and Woodford rewrote the
macroeconomic stabilization toolkit, which central banks and governments are now
adopting to anchor inflation, tame business cycles, and successfully navigate
global economic shocks with transparency and credibility. Thus came into
existence the broader New Keynesian Dynamic Stochastic General Equilibrium
(DSGE model) as the modern benchmark framework for central banks to bridge the
gap between microeconomic behaviour and macroeconomic policy.
That said, the New Keynesian stabilization framework has its own
limitations: while highly effective at smoothing normal, demand-driven business
cycles, it is not that effective at addressing structural turbulence from pandemics,
wars and supply chain disruptions driven by geopolitical tensions.
**
