Nonlinear Phillips curve,NAIRU and monetary policy rules

The US Phillips curve is modeled with a logistic smooth transition autoregression specification that allows various nonlinear shapes. Using this, the paper derives model-consistent estimates of the NAIRU. The NAIRU is defined as the level of unemployment rate that would correspond to a forecast of no inflation changes over the policy horizon. This paper also investigates the implications of nonlinearities in the Phillips curve for deriving optimal monetary policy rules. The optimal policy rule for interest rates and implied sacrifice ratios are found to be nonlinear as well.      

The optimal neglect of inflation: An alternative interpretation of UK monetary policy during the “Great Moderation”

This paper argues that UK monetary policymakers did not respond to the inflation rate during most of the “Great Moderation” that ran from the early 1990s to the mid-2000s. We derive a generalisation of the New Keynesian Phillips curve in which inflation is a non-linear function of the output gap and show that the optimal response of the policy rule to inflation depends on the slope of the Phillips curve; if this is flat, manipulation of aggregate demand through monetary policy does not affect inflation and so policymakers cannot affect inflation. We estimate the monetary policy rules implied by a variety of alternative Phillips curves; our preferred model is based on a Phillips curve that is flat when output is close to equilibrium. We find that policy rates do not respond to inflation when the output gap is small, a situation that characterised most of the “Great Moderation” period.     

菲利普斯曲线与中国货币政策目标选择

本文概述了菲利普斯曲线的演进过程及西方经济学家关于菲利普斯曲线的竞争,在此基础上对论了中国菲利普斯曲线的变化及现阶段的货币政策选择。     

Asymmetry and the Problem of Aggregation in the Euro Area

This paper highlights the implications for a single monetary policy when key economic relationships are nonlinear or asymmetric at a disaggregate level. Using data for the EU and OECD countries we show that there are considerable non-linearities and asymmetries in the Phillips and Okun curves. High unemployment has relatively limited effect in pulling inflation down while low unemployment can be much more effective in driving it up. Downturns in the economy are both more rapid and sustained in driving unemployment up than recoveries are in bringing it down. There is considerable variety in these relationships and IS curves across not just countries but also sectors and regions.     

Optimal monetary policy revisited: does considering US real-time data change things?

The primary goal of this article is to investigate whether properly modelling real-time data and optimal real-time decision-making of a monetary planner provides new insights into monetary policy behaviour and outcomes. This article extends a variant of the asymmetric preference model suggested by Ruge-Murcia to investigate the use of real-time data available to policymakers when making their decisions and revised data which more accurately measure economic performance, but is only available much later. In our extended model, the central banker targets a weighted average of revised and real-time inflation together with a weighted average of revised and real-time output. Moreover, we allow for an asymmetric central bank response to real-time data depending on whether the unemployment rate is high or low. Our model identifies several new potential sources of inflation bias due to data revisions. Our empirical results suggest that the Federal Reserve Bank focuses on targeting revised inflation during low unemployment periods, but it weighs heavily real-time inflation during high unemployment periods. The inflation bias due to data revisions is comparable in magnitude to the bias from asymmetric central banker preferences with the bias being somewhat larger during high unemployment.     

重新认识菲利普斯曲线的真正价值

菲利普斯曲线的真正价值不在于失业率与通胀率之间的置换关系而在于对经济运行态势的勾勒。短期菲利普斯曲线可分为六种类型，长期菲利普斯曲线则极不规则，就实现宏观调控而言，研究短期菲利普斯曲线更有意义。     

Globalization and flattening of Phillips Curve in Turkey between 1987 and 2007

In the last two decades, there have been important changes in inflation dynamics in Turkey. While average inflation rate, inflation volatility and inflation persistence declined, the prices of tradable goods have shown an increase less than prices of non-tradable goods. The aim of this paper is to inquire whether the globalization has an effect on this change and to test whether and how it affected the slope of the Phillips Curve. The findings point out that global activity did have an effect on domestic inflation rate and that Phillips Curve got flatter.     

实证分析:我国菲利普斯曲线失灵与应对财政政策就业效应

1998年至今我国经济呈现出GDP高速增长的态势,但是这种经济的高速增长伴随着的是宏观经济运行的两大不稳定因素,一是物价持续上涨,二是就业形势日益严峻,宏观经济呈现出菲利普斯曲线失灵的特点。本文在运用GDP增长率、失业率和通货膨胀率等相关指标来论证、描述和解析我国菲利普斯曲线失灵现象的基础上,主要对近几年我国政府在应对菲利普斯曲线失灵时所采取的相关反失业财政政策及其就业效应进行了分析,从而为我国政府今后如何继续完善和实施治理失业的财政政策起到一个抛砖引玉的作用。