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Working Paper
Credible Forward Guidance
We analyze credible forward guidance policies in a sticky-price model with an effective lower bound (ELB) constraint on nominal interest rates by solving a series of optimal sustainable policy problems indexed by the duration of reputational loss. Lower-for-longer policies---while effective in stimulating the economy at the ELB---are potentially time-inconsistent, as the associated overheating of the economy in the aftermath of a crisis is undesirable ex post. However, if reneging on a lower-for-longer promise leads to a loss of reputation and prevents the central bank from effectively using ...
Working Paper
Fiscal Multipliers at the Zero Lower Bound: The Role of Policy Inertia
The presence of the lagged shadow policy rate in the interest rate feedback rule reduces the government spending multiplier nontrivially when the policy rate is constrained at the zero lower bound (ZLB). In the economy with policy inertia, increased inflation and output due to higher government spending during a recession speed up the return of the policy rate to the steady state after the recession ends. This in turn dampens the expansionary effects of the government spending during the recession via expectations. In our baseline calibration, the output multiplier at the ZLB is 2.5 when the ...
Working Paper
A Promised Value Approach to Optimal Monetary Policy
This paper characterizes optimal commitment policy in the New Keynesian model using a novel recursive formulation of the central bank's infinite horizon optimization problem. In our recursive formulation motivated by Kydland and Prescott (1980), promised inflation and output gap---as opposed to lagged Lagrange multipliers---act as pseudo-state variables. Using three well known variants of the model---one featuring inflation bias, one featuring stabilization bias, and one featuring a lower bound constraint on nominal interest rates---we show that the proposed formulation sheds new light on the ...
Working Paper
Reputation and Liquidity Traps
Can the central bank credibly commit to keeping the nominal interest rate low for an extended period of time in the aftermath of a deep recession? By analyzing credible plans in a sticky-price economy with occasionally binding zero lower bound constraints, I find that the answer is yes if contractionary shocks hit the economy with sufficient frequency. In the best credible plan, if the central bank reneges on the promise of low policy rates, it will lose reputation and the private sector will not believe such promises in future recessions. When the shock hits the economy sufficiently ...
Working Paper
Financial Stability and Optimal Interest-Rate Policy
We study optimal interest-rate policy in a New Keynesian model in which the economy can experience financial crises and the probability of a crisis depends on credit conditions. The optimal adjustment to interest rates in response to credit conditions is (very) small in the model calibrated to match the historical relationship between credit conditions, output, inflation, and likelihood of financial crises. Given the imprecise estimates of key parameters, we also study optimal policy under parameter uncertainty. We find that Bayesian and robust central banks will respond more aggressively to ...
Working Paper
Uncertainty at the zero lower bound
This paper examines how the presence of uncertainty alters allocations and prices when the nominal interest rate is constrained by the zero lower bound. I conduct the analysis using a standard New Keynesian model in which the nominal interest rate is determined according to a truncated Taylor rule. I find that an increase in the variance of shocks to the discount factor process reduces consumption, inflation, and output by a substantially larger amount when the zero lower bound is binding than when it is not. Due to the zero lower bound constraint, policy functions for the real interest rates ...
Discussion Paper
Raising the Inflation Target: Lessons from Japan
In January 2013, the Bank of Japan increased its inflation target from 1 percent to 2 percent in an effort to end chronic deflation that had lasted for more than a decade. In this note, the author reviews this Japanese experience and highlights possible lessons for other central banks that may be interested in examining the possibility of raising their inflation target at some point in the future.
Working Paper
Gradualism and Liquidity Traps
Modifying the objective function of a discretionary central bank to include an interest-rate smoothing objective increases the welfare of an economy in which large contractionary shocks occasionally force the central bank to lower the policy rate to its effective lower bound. The central bank with an interest-rate smoothing objective credibly keeps the policy rate low for longer than the central bank with the standard objective function. Through expectations, the temporary overheating of the economy associated with such a low-for-long interest rate policy mitigates the declines in inflation ...
Discussion Paper
Model-Based Measures of ELB Risk
The target range for the federal funds rate has increased a few times since its liftoff from the effective lower bound (ELB) in December 2015 and currently stands at 1 to 1-1/4 percent. According to standard macroeconomic models, ELB risk--how likely it is for the policy rate to be constrained by the ELB in the near- and medium-term future--has important implications for interest rate policy. In this note, I construct measures of ELB risk by combining survey-based projections of the U.S. economy with stochastic simulations of the FRB/US model, a large-scale model of the US economy maintained ...
Working Paper
The Risky Steady State and the Interest Rate Lower Bound
Even when the policy rate is currently not constrained by its effective lower bound (ELB), the possibility that the policy rate will become constrained in the future lowers today's inflation by creating tail risk in future inflation and thus reducing expected inflation. In an empirically rich model calibrated to match key features of the U.S. economy, we find that the tail risk induced by the ELB causes inflation to undershoot the target rate of 2 percent by as much as 45 basis points at the economy's risky steady state. Our model suggests that achieving the inflation target may be more ...