Economy
The Last Mile Problem: Why Final Inflation Targets Are So Hard to Reach
The final stretch of disinflation has historically proven the most challenging, particularly after the pandemic cycle's unique economic disruptions.
Central banks worldwide have faced a persistent challenge: achieving the final mile of disinflation. While initial progress toward price stability often comes relatively quickly, the last stage of bringing inflation down to target has historically proven stubbornly difficult. This phenomenon is particularly pronounced in the current economic cycle, which has been shaped by the unique disruptions of the pandemic. The final stretch of disinflation presents a complex puzzle for policymakers, as traditional economic models often struggle to capture the nuances of this late-stage transition.
The pattern is consistent enough across countries and eras to be considered structural rather than incidental. Inflation falls rapidly from its peak, slows as it approaches the target range, and then hovers—teasingly close yet persistently above—as the remaining drivers prove resistant to both time and policy. The economics of the last mile are different from the economics of the first mile, and treating them as the same journey is where both markets and policymakers tend to err.
Understanding why the last mile is hard is more than an academic exercise: it determines how long restrictive policy must remain in place, how much labor-market pain the final stretch requires, and how markets should price the endgame. It also explains the current moment's central tension—declaring victory too early risks entrenchment, while holding out for perfection risks needless damage.
Key Takeaways
- Disinflation reliably decelerates near the target: early progress comes quickly from reversing shocks, while the final increments depend on slower-moving wage and service-price dynamics.
- The pandemic cycle left legacy pressures—in services, housing measurement, and labor markets—that resist standard policy remedies.
- Labor market tightness and service-sector inflation are the defining features of the last mile, as goods prices normalize long before wages do.
- The policy trade-off sharpens near the target: overshooting causes avoidable damage, while premature easing risks unanchoring expectations.
Historical Patterns of Disinflation
Historically, disinflation processes follow a pattern in which initial reductions in inflation rates come more readily than the final steps to target levels. The early stages often benefit from rapid policy responses, anchored inflation expectations, and the removal of obvious supply constraints. However, as economies approach their inflation targets, progress tends to slow dramatically. This last-mile problem has been observed across multiple decades and different economic environments, suggesting it is a structural feature of the disinflation process rather than a temporary one.
The mechanics are well understood by economists. The first tranche of disinflation reverses the transitory: supply shocks fade, commodity prices normalize, and interest-sensitive demand retreats. But the remaining inflation is embedded in slower-moving components—wages contracted for years ahead, leases that reset gradually, and service prices set in consolidated local markets—that respond to policy only through cumulative restraint and time.
History's starkest lesson concerns the cost of stopping early. Episodes in which central banks relaxed before inflation was fully contained saw progress stall and expectations drift, requiring renewed tightening later at higher cumulative cost. Conversely, sustained restraint achieved durable price stability but often at the cost of recession. The record offers no free lunch—only choices about which risk to carry.
The Pandemic's Unique Impact
The pandemic cycle has introduced new complexities to the disinflation journey. The initial shock was unlike anything seen in recent history—unprecedented supply chain disruptions, massive fiscal stimulus, and rapid shifts in consumer behavior all at once. These factors altered traditional economic relationships, making it harder for central banks to rely on historical precedents. The aftermath has left a legacy of persistent price pressures in certain sectors, which resist typical policy remedies.
Several pandemic-era distortions remain visible. Demand composition shifted durably, complicating capacity planning. Labor force participation recovered unevenly, leaving some sectors structurally short of workers even as aggregate employment improved. And elevated fiscal deficits sustaining demand have arguably weakened the transmission of monetary restraint compared with past cycles.
Analysts also point to a subtler legacy: firms that learned during the supply-crisis years that consumers would accept rapid price increases have, in some sectors, been slower to unwind them. Competition eventually disciplines this behavior, but far more slowly than the original increases went up.
Sticky Dynamics: Labor, Services, Expectations
Several factors contribute to the stickiness of inflation in its final stages. Labor markets often remain tight even as overall inflation cools, with workers maintaining bargaining power. Service sector inflation tends to be more persistent than goods inflation, as it is less affected by global supply chains and more influenced by domestic wage dynamics. Additionally, inflation expectations can become unanchored if the disinflation process takes too long, creating a self-reinforcing cycle that makes further progress more difficult.
The expectations mechanism deserves emphasis because it is the channel through which the last mile becomes self-fulfilling. If households and firms believe inflation will remain above target, they set wages and prices accordingly—and it does. Central bank credibility, the accumulated belief that policymakers will do what is necessary, is the counterweight. The current cycle has tested that credibility more than any since the inflation-targeting era began, and policymakers have repeatedly emphasized that preserving it takes precedence over short-term growth considerations.
Policy Challenges in the Final Stretch
Central banks face delicate balancing acts when approaching their targets. Aggressive tightening to achieve final goals risks overshooting into unnecessary economic damage, while maintaining accommodative policy too long risks entrenching inflation. The communication challenge is particularly acute, as markets and the public must interpret signals about when the job is done enough versus when further action is needed—and that uncertainty can itself contribute to volatility.
The toolkit has also evolved. Alongside interest rates, central banks have leaned on balance-sheet policy and forward guidance, and several have initiated formal reviews of their frameworks—a recognition that the pandemic cycle revealed gaps in the pre-existing orthodoxy. The emerging consensus emphasizes flexibility: policy restrictive enough to finish the job, responsive to genuine downside risks, and clear about the conditions for each adjustment.
The Path Forward Into 2027
Navigating the last mile requires careful calibration and clear communication. Central banks may need to accept a slower pace of disinflation in certain sectors while focusing on broader price stability, with enhanced data analysis and framework flexibility compensating for traditional models' reduced reliability. The goal is not just reaching the numerical target but ensuring price stability that is sustainable and broadly based.
Markets should pay close attention to labor market indicators, particularly wage growth in service sectors, and to the behavior of inflation expectations for signs of either convergence or trouble. Global supply chains and commodity prices provide the external context that can accelerate or reverse domestic progress. And fiscal policy, long the junior partner in the inflation narrative, may matter more in this cycle's endgame than in any recent one: government demand that stays strong keeps the last mile long, whatever central banks do.
The honest conclusion is that the last mile cannot be rushed. It can be managed—with credibility, patience, and calibrated policy—but the components that make it slow are precisely the components that central banks influence least directly. The path to price stability is rarely straight, and the last mile is often the most challenging part of the journey.
FAQ
Why is the last mile of disinflation so hard?
Because the easier gains come from reversing transitory shocks, while the final increments depend on wages, leases, and service prices—slow-moving components that respond to policy only with time. Whatever inflation remains at the last mile is, by definition, the inflation that resists standard remedies.
What makes this cycle's last mile different?
The pandemic's unique disruptions—shifted demand patterns, uneven labor recovery, elevated fiscal deficits, and changed firm pricing behavior—altered relationships that models rely on, leaving central banks with less reliable precedent for the endgame.
What happens if a central bank stops too early?
Inflation can plateau above target, and expectations may drift upward, potentially requiring renewed tightening later at higher cumulative cost. Historical episodes where restraint was relaxed prematurely are the cautionary tales central bankers most often cite.
How will we know when the job is done?
Not by the headline number alone. Policymakers look for inflation sustainably at target across services as well as goods, wage growth consistent with the target, and well-anchored expectations—conditions that hold through a full cycle of data, not a single favorable reading.
The Bottom Line
The last mile problem is not a failure of policy but a feature of the process. Disinflation's early progress is almost mechanical—the reversal of shocks and the retreat of rate-sensitive demand—while its completion runs through the slow channels of wages, contracts, and expectations. Every recent disinflation has slowed near the target for the same reason, and the pandemic cycle, with its layered distortions, has made the pattern more pronounced rather than less.
For policymakers, the mandate is discipline without dogma: maintaining enough restraint to finish the job while responding to genuine downside risks, and prioritizing the credibility on which the entire inflation-targeting enterprise rests. For markets and households, the practical implication is patience—expect the final approach to target to be uneven, with services and wages the last to yield. The last mile is the hardest, but it is not endless; it is simply the part of the journey that cannot be rushed, only completed.