An Eclectic Approach to Estimating U.S. Potential GDP

Rennison (Comparing alternative output gap estimations: a Monte Carlo approach, 2003) has provided simulation-based evidence showing that the joint use of extended multivariate filters and structural vector autoregression models is optimal for estimating potential output. We use this approach to estimate the two components of potential GDP: the full-employment labour input and trend labour productivity. This decomposition is useful for identifying sources of fluctuations in potential output. It reveals, for example, that the vigorous growth rate of U.S. potential GDP recorded during the second half of the 1990s is attributable to a fall in the structural rate of unemployment and a marked upswing in trend productivity growth.     

Testing the significance and the non-linearity of the Phillips trade-off in the Euro Area

This paper tests the significance and the non-linearity of the Phillips trade-off in the aggregate Euro Area, in an unobserved components model of stochastic NAIRU and trend output featuring the Phillips equation and the Okun law as main identifying equations, with quarterly data for 1970:I-2002:III. The Phillips curve turns out to be linear and its trade-off statistically significant, while non-linearity shows up in the Okun relation. The results prove to be robust to alternative lag length structures of the model, and to alternative non-linear functional forms. The trend-cycle decompositions estimated with the model capture the main features of the Euro Area’s recent macroeconomic record.First version received: 1 September 2003 / Final version received: June 2004CEMPRE - Centro de Estudos Macroeconómicos e Previsão - is supported by the Fundação para a Ciência e a Tecnologia, Portugal, through the Programa Operacional Ciência, Tecnologia e Inovação (POCTI) of the Quadro Comunitário de Apoio III, which is financed by FEDER and Portuguese funds.We thank comments on earlier versions by Fabio Canova, Miguel St Aubyn, Alvaro Almeida, Pete Richardson, Kevin Ross, and two anonymous referees. We acknowledge James D. Hamilton’s help with the confidence bands. The usual disclaimer applies.     

中国非加速通货膨胀失业率研究

本文主要研究1978~2004年间的我国非加速通胀率。研究发现中国城镇登记失业率与城镇居民消费物价指数间存在并不显著的菲利普斯曲线。协整检验表明失业率与通胀率具有协整关系。传统计量方法表明我国的NAIRU在3.4%左右。同时对TV-NAIRU序列的HP滤波检验与Gordon模型分析表明我国NAIRU具有相同的变化趋势,这种趋势得到人口特征与劳动生产率角度的解释。此外,两种模型的结果均表明目前我国实际失业率低于NAIRU,经济形势存在通胀的压力。     

A system approach for measuring the euro area NAIRU

This paper addresses the issue of measuring the NAIRU for the euro area and assessing the robustness and precision of the obtained estimates. The empirical framework adopted is based on systems combining an Okun-type relationship between cyclical unemployment and the output gap with a Phillips curve and stochastic laws of motion for the NAIRU and potential output. Such systems have been estimated using Kalman-filter techniques. The results obtained point to an estimate of the area-wide NAIRU that is robust to changes in the underlying models. This robustness is shown to hold both in terms of the mean – i.e., the shape of the resulting NAIRU – and the variance of the process. The latter is derived through bootstrap exercises using the models alone or pooled together. The evidence found suggests that the increase in the aggregate NAIRU that took place in the early part of the sample period has come to a halt and may be about to be reversed.Jel classification: C11, C15, E31, E32The opinions expressed in this paper are those of the authors and do not necessarily reflect the views of the Institutions they belong to. The authors are grateful to Per Jansson for providing parts of the econometric RATS code and to Gonzalo Camba-Mendez and Frank Smets of the ECB for useful comments. Comments and recommendations by two anonimous referees are also gratefully acnowledged. All the remaining errors are the authors responsibility. All correspondence to Ricardo Mestre.First version received: January 2002/Final version received December 2002     

The Unemployment Effects of Proposed Changes in Social Security's “Normal Retirement Age”

This paper identifies and analyzes an inherent conflict between some proposed U. S. Social Security reform measures, which would encourage delayed retirement decisions, and the objective of minimizing the economy's unemployment rate. Using recent demographic trends in the age composition of the U.S. labor force, the study suggests that such proposed U.S. Social Security reform measures may actually increase the economy's unemployment rate. It concludes that measures to encourage older workers would relieve labor market pressures (while also helping the Social Security system) if and only if unemployment was persistently near the non-accelerating inflation rate of unemployment (NAIRU). However, in an economy with above NAIRU unemployment, which has been the case most often in recent years, the opposite Social Security policy logic would apply. JEL Classification H557     

Identification and dimension of the NAIRU

In this paper, we have re-examined the identification of the NAIRU and presented a well-defined reduced form for analysing the equilibrium unemployment rate, using a cointegrated VAR model. We have stated that the NAIRU estimates using the conventional reduced form (or Phillips curve) models are misleading since the natural rate of unemployment cannot be considered as a fixed point calling for the ceteris paribus assumption for all the data involved. This implies that the NAIRU estimates are unable to provide valuable information on the labour market status.     

Unemployment or credit: Which one holds the potential? Results for a small open economy with a low degree of financialization

This paper investigates the relative importance of unemployment versus credit in determining the potential level of real activity for a small open economy with a low degree of financialization. We use a multivariate unobserved component model (MUC) to derive the potential output and the associated output gap for the Lithuanian economy. The model is estimated via Bayesian methods and the time paths of unobserved variables are extracted via the Kalman filter. The inclusion of unemployment in the MUC model substantially improves the estimates of the output gap in real time. Adding information about credit further emphasizes the overheating of the economy in the pre-crisis period, both in real time and ex post. Including credit preserves the conclusions regarding turning points. We uncover a strong negative correlation between the model-implied unemployment gap (without accounting for credit) and real credit growth. Data revisions do not appear to be the primary source of revisions of output gap estimates.     

NAIRU and productivity shocks: evidence from three gigantic economies

This article investigates NAIRU which stands for Non Accelerating Inflation Rate of Unemployment and its trend in three of the world gigantic economies to mention orderly USA, Japan and China. A Vector Autoregressive Regression model estimated to study the reaction of NAIRU to shocks imposed by labour productivity. Results indicate both productivity shocks and NAIRU fluctuations have counter effects.     

Inflation-unemployment tradeoff and regional labor market data

We estimate a linear and a piecewise linear Phillips curve model with regional labor market data for West German and Neue L?nder. Employing regional observations allows us to country difference the data. This eliminates, under the assumption of homogeneous L?nder, supply shocks and changes in the formation of expectations as possible identification failures. With seemingly unrelated regressions we find a flat Phillips curve in the Neue L?nder. For the West German L?nder a piecewise linear model with a higher inflation-unemployment tradeoff for the regime of low unemployment rates fits the data very well. The results hold true if we control for endogeneity of the unemployment rate. With a kinked but upward sloping aggregate supply curve there seems to be room for stabilization policies, at least in the range of aggregate demand shifts that our data covers. First version received: December 2000/Final version accepted: Jan. 2002 RID="*" ID="*"  An earlier version of this paper was written while the second author was at Universidad Carlos III in Madrid. He thanks Juan Dolado and is grateful for financial support by the TMR Program on New Approaches for the Study of Economic Fluctuations. He would also like to thank Bertrand Koebel for his critique on that earlier version. Both authors are grateful to an editor and three anonymous referees for very helpful comments. Moreover, we wish to thank participants of the seminar on Quantitative Wirtschaftsforschung by Jürgen Wolters and Peter Kuhbier, Freie Universit?t Berlin. Finally we profited from discussions with participants at the conferences of the European Economic Association in Lausanne and the Verein für Socialpolitik in Magdeburg where the paper was presented. Of course, all errors are to our sole responsibility.     

Conflict inflation: estimating the contributions to wage inflation in Australia during the 1990s

One of the major emerging macroeconomic problems during thepast century has been the tendency for inflation to accelerateunder prolonged periods of full employment. According to Isaacand Kaldor, this arises because the three major objectives ofwage earners often conflict. The first objective is the desireto maintain relativities; the second is the desire to have a‘fair’ share of companies' profits; and the thirdis a reluctance to allow any encroachment on achieved standardsof living owing to unfavourable (exogenous) events. This papertests how well these three objectives explain wage inflationin Australia using a pseudo-panel data based on the period 1989–2000.The authors find that wages are sensitive to the three majorobjectives, but not to occupational unemployment rates.