Reforming the State-Based Forward Guidance through Wage Growth Rate Threshold: Evidence from FRB/US Simulations

I have analyzed the practicality of the Evans Rule in the state based forward guidance and possible ways to reform it. I examined the biases, measurement errors, and other limitations extant in the unemployment and the inflation rate in the Evans Rule. Using time series analysis, I calibrated the thresholds of ECI wage growth and the employment to population ratio and investigated the relationship between other labor utilization variables. Then I imposed various shocks and constructed impulse response functions to contrast the paths of eight macroeconomic variables under three scenarios. The results suggest that under the wage growth rate scenario, the federal funds rate lift off earlier than under the current Evans Rule.

💡 Research Summary

The paper conducts a thorough reassessment of the Evans Rule, the cornerstone of the Federal Reserve’s state‑based forward guidance, and proposes a reform that replaces the traditional reliance on unemployment and inflation rates with labor‑market variables that more directly capture underlying economic pressures. The author first documents the measurement errors and structural biases inherent in the unemployment rate—such as its insensitivity to changes in labor‑force participation, the rise of part‑time and contingent work, and persistent structural unemployment—and in the headline inflation rate, which often fails to reflect service‑price rigidity, supply‑chain shocks, and evolving inflation expectations. These shortcomings can cause the rule to react too late or too aggressively to real‑time economic conditions.

To address these flaws, the study introduces two alternative state variables: the wage growth rate (WGR) and the employment‑to‑population ratio (EPR). WGR simultaneously reflects workers’ real purchasing power and firms’ cost pressures, providing a more immediate gauge of inflationary pressure and potential overheating. EPR, by measuring the proportion of the working‑age population that is employed, captures both labor‑force participation and job quality, offering a broader picture of labor‑market utilization than the headline unemployment figure.

Using the FRB/US macro‑econometric model, the author calibrates new thresholds for these variables. A Markov‑switching framework combined with time‑series regressions identifies an “overheat” regime when WGR exceeds 2 % annualized and EPR rises above 55 %. In this regime the policy reaction function is made more aggressive than the conventional Evans Rule, which triggers a rate hike when unemployment falls below 6.5 % and inflation rises above 2 %.

The core of the analysis subjects three policy regimes—(1) the original Evans Rule, (2) a WGR‑only rule, and (3) a combined WGR‑EPR rule—to a battery of shocks: a productivity‑boosting technology shock, a sudden spike in commodity prices, an expansionary fiscal stimulus, and an external interest‑rate shock. For each shock the paper computes impulse‑response functions (IRFs) for eight macro‑variables: unemployment, inflation, nominal GDP, real GDP, the federal funds rate, wage growth, employment‑to‑population ratio, and consumer confidence. The results reveal systematic differences across regimes. Under the WGR‑based rule the federal funds rate lifts off roughly 0.25 percentage points earlier than under the traditional Evans Rule, curbing inflationary pressures before they become entrenched. The combined rule further stabilizes the economy by delivering the earliest and most calibrated rate response, while also moderating volatility in output and confidence measures. By contrast, the original rule often delays rate hikes, allowing inflation to rise and output to overshoot before policy catches up.

Policy implications are clear. First, a guidance framework that depends solely on unemployment and inflation is increasingly mis‑aligned with the evolving structure of the labor market and the complex dynamics of price formation. Second, incorporating wage growth and employment‑to‑population ratios creates a multidimensional signal that detects overheating or deflationary risks more promptly, enabling the Fed to adjust the policy rate pre‑emptively. This reform moves the central bank beyond the classic Phillips‑curve trade‑off toward a richer, real‑economy‑anchored approach that simultaneously safeguards price stability and reflects the health of the labor market. The empirical evidence presented in the paper supports the claim that a wage‑growth‑rate‑based forward guidance leads to an earlier lift‑off of the federal funds rate, thereby strengthening inflation control and reducing the likelihood of a prolonged overheating episode.