The Long View: Claudia Sahm - Thinking Through Scenarios in a Whiplash Economy

Key Concepts

• Sahm Rule: An economic indicator that signals the start of a recession when the three-month moving average of the national unemployment rate rises by 0.5 percentage points or more relative to its low over the previous 12 months.
• Supply Shocks: Economic events (e.g., pandemics, wars, tariffs) that disrupt the production or supply of goods, often simultaneously pushing up inflation and suppressing growth.
• Whiplash Economy: A term describing the current economic environment characterized by a rapid succession of large, unpredictable supply shocks.
• Automatic Stabilizers: Economic policies (like unemployment insurance or progressive taxation) that automatically adjust to support the economy during downturns without requiring new legislative action.
• General Purpose Technology (GPT): A transformative technology (like AI) that has the potential to significantly boost productivity and growth across the entire economy over the long term.
• Break-even Job Growth: The number of new jobs required each month to keep the unemployment rate constant, currently estimated to be near zero due to demographic shifts and labor supply changes.

1. The "Whiplash Economy" and Supply Shocks

Claudia Sahm characterizes the post-pandemic U.S. economy as a "whiplash economy" defined by a series of supply shocks rather than traditional demand-side fluctuations.

• Nature of Shocks: Unlike typical recessions driven by demand collapses, recent shocks—including supply chain disruptions, the war in Ukraine, Middle East conflicts, and tariff volatility—have created "stagflationary" pressure (rising prices and slowing growth).
• Fed’s Response: The Federal Reserve is currently in "risk-management mode." Rather than relying on a single base-case forecast, the Fed is performing scenario analysis to avoid worst-case outcomes, leading to a cautious, data-dependent "holding pattern."

2. The Sahm Rule: Utility and Limitations

Developed by Sahm for a 2019 Brookings Institution volume, the rule was designed as a simple, automatic trigger for stimulus payments.

• Mechanism: It uses the unemployment rate because it is a reliable, high-frequency indicator of household distress.
• 2024 Anomaly: The rule triggered in 2024 despite the economy not being in a recession. Sahm explains this was due to a surge in labor supply (immigration) rather than a collapse in demand. She notes that labor supply is the "Achilles' heel" of the rule, emphasizing that indicators must be interpreted within the context of current structural shifts.

3. The Role of AI in Macroeconomics

Sahm views AI as a potential "positive supply shock" that could increase productivity and lower inflation over the long term.

• Short-term Risks: The transition period involves significant capital expenditure and energy costs, which may create inflationary pressure in the near term.
• Labor Market: While AI will likely destroy specific job roles, Sahm argues it will also create new ones, consistent with historical technological shifts. She cautions against the Fed "getting ahead of the data" by cutting rates prematurely based on the promise of AI-driven disinflation.

4. Statistical Integrity and Agency Funding

Sahm expresses concern regarding the health of U.S. statistical agencies (e.g., the Bureau of Labor Statistics).

• The Problem: Decades of underfunding have led to reduced survey participation and geographic coverage, making economic data "noisier" and harder to interpret.
• Political Risk: While she has seen no evidence of "doctoring" numbers, she notes that the firing of the BLS commissioner and the "DOGE" (Department of Government Efficiency) efforts create an environment of neglect that threatens the quality of data that the world relies upon.

5. Cultural Critique of Economics

In her 2020 post, "Economics is a Disgrace," Sahm criticized the field for being hyper-competitive and exclusionary.

• Key Argument: The lack of representation (gender, race, and socioeconomic background) limits the diversity of thought in policy-making.
• Impact: She argues that the culture is detrimental to the next generation of economists and hinders the development of innovative policy solutions.

Synthesis and Conclusion

The primary takeaway is that the U.S. economy is undergoing a fundamental "rewiring" due to demographic shifts, aging populations, and a series of unprecedented supply shocks. For investors and policymakers, this means that historical rules of thumb (like the Sahm Rule or yield curve inversions) are less reliable than in the past. Sahm advocates for a "show me the data" approach, emphasizing that the Fed must remain patient and avoid premature policy pivots. Furthermore, she stresses that the integrity of the U.S. economy depends on reinvesting in statistical agencies to ensure that decision-makers have accurate, high-quality data to navigate an increasingly complex global landscape.