Working Paper: CEPR ID: DP7581
Authors: Andrew Levin; David López-Salido; Edward Nelson; Tack Yun
Abstract: The recent literature on monetary policy in the presence of a zero lower bound on interest rates has shown that forward guidance regarding the path of interest rates can be very effective in preserving macroeconomic stability in the face of a contractionary demand shock; moreover, that literature apparently leaves little scope for any further improvements in stabilization performance via nontraditional monetary policies. In this paper, we characterize optimal policy under commitment in a prototypical New Keynesian model and examine whether those conclusions are sensitive to the specification of the shock process and to the interest elasticity of aggregate demand. Although forward guidance is effective in offsetting natural rate shocks of moderate size and persistence, we find that the macroeconomic outcomes are much less appealing for larger and more persistent shocks, especially when the interest elasticity parameter is set to values widely used in the literature. Thus, while forward guidance could be sufficient for mitigating the effects of a 'Great Moderation'-style shock, a combination of forward guidance and other monetary policy measures - such as large-scale asset purchases - might well be called for in responding to a 'Great Recession'-style shock.
Keywords: forward guidance; optimal policy under commitment; zero lower bound
JEL Codes: E32; E43; E52
Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.
| Cause | Effect |
|---|---|
| forward guidance (E60) | macroeconomic stability (E60) |
| forward guidance (E60) | output (C67) |
| forward guidance (E60) | inflation (E31) |
| interest elasticity parameter (D11) | effectiveness of forward guidance (E60) |
| shock process (C69) | effectiveness of forward guidance (E60) |
| optimal commitment policy (D86) | economic outcomes (F61) |
| forward guidance + other monetary policy measures (E52) | better economic outcomes (P17) |