Do global output gaps help forecast domestic inflation? Evidence from Phillips curves for Poland

This study confronts domestic and global views on inflation through the use of the Hybrid New Keynesian Phillips Curve (HNKPC) models estimated for headline and core inflation in Poland. We analyse the roles of the global vs. domestic output gaps in affecting price changes. We ensure that our conclusions are robust by taking into consideration various proxies for inflation expectations, imported inflation, the domestic output gap and the global output gap.Our results suggest that the global demand conditions are statistically insignificant in the majority of the estimated global versions of HNKPC, independently of the measure of them that is considered. In terms of empirical fit, and especially of the out-of-sample forecasting accuracy, the specifications of the Phillips curve with the domestic and global output gaps among the explanatory variables are not superior to traditional Phillips curves. Interestingly, the relative importance of the global output gap is much smaller in models that are estimated in terms of core inflation, excluding foodstuffs and energy, than in CPI inflation models. This suggests that global demand conditions affect the inflation in Poland indirectly, mainly through the prices of food and energy raw materials.The main conclusion from our study is that external factors that are already considered in the traditional hybrid versions of the new Keynesian Phillips curve are sufficient to account for global influences on prices in the domestic economy. The concept of the global output gap improves neither the explanatory nor the predictive power of HNKPC models.     

Measuring output gap nowcast uncertainty

We propose a methodology for gauging the uncertainty in output gap nowcasts across a large number of commonly-deployed vector autoregressive (VAR) specifications for inflation and the output gap. Our approach utilises many output gap measures to construct ensemble nowcasts for inflation using a linear opinion pool. The predictive densities for the latent output gap utilise weights based on the ability of each specification to provide accurate probabilistic forecasts of inflation. In an application based on US real-time data, nowcasting over the out-of-sample evaluation period from 1991q2 to 2010q1, we demonstrate that a system of bivariate VARs produces well-calibrated ensemble densities for inflation, in contrast to univariate autoregressive benchmarks. The implied nowcast densities for the output gap are multimodal and indicate a considerable degree of uncertainty. For example, we assess the probability of a negative output gap at around 45% between 2004 and 2007. Despite the Greenspan policy regime, there still remained a substantial risk that the nowcast for output was below potential in real time. We extend our methodology to include distinct output gap measures, based on alternative filters, and show that, in our application, the nowcast density for the output gap is sensitive to the detrending method.     

对中国通货膨胀的实证研究——从一般到特殊的建模方法

本文采用从一般到特殊的建模方法,利用PcGets软件,实证考察了1994~2009年中国通货膨胀与货币供应、产出缺口、汇率和国际原油价格之间的联系。研究表明,通货膨胀和货币供应之间存在长期稳定的正相关关系,但通货膨胀并不完全是货币现象。除货币供应外,还有其他更多重要变量共同决定通货膨胀的变化。产出缺口与通货膨胀之间存在显著关系,因而不能忽视汇率因素对通货膨胀的影响等。     

Asset price targeting in an open economy with cognitive limitations: The best for macroeconomic and financial stability?

The choices of policy targets and the formation of agent expectations have been critical issues addressed by monetary policy management since the financial crisis of 2008. This paper evaluates macroeconomic stability in a new Keynesian open economy in which agents experience both cognitive limitations and asset market volatility. The (im)perfect credibility of various monetary policies (e.g., a Taylor-type rule with- or without asset price targeting, strict domestic inflation targeting, strict CPI inflation targeting, and exchange rate peg) may lead agents to react according to their expectation rules, and thus create various degrees of booms and busts in output and inflation. Simulations confirm that a Taylor-type CPI inflation targeting including an asset price target is the best choice. In contrast, the business cycles induced by Keynesian “animal spirits” are enhanced by strict inflation targeting. Furthermore, a credible exchange rate pegging system with an international reserve pooling arrangement can improve social welfare and stability in an open economy, even though its absolute value of the loss function is slightly lower than a Taylor-type CPI inflation targeting including an asset price target.     

Input–Output Based Measures of Underlying Domestic Inflation: Empirical Evidence from Denmark 1903–2002

The paper presents input–output based time-series data for the underlying domestic inflation in Denmark 1903–2002 and analyses the inflationary development during the last century. More conceptual issues in relation to the interpretation and use of input–output based domestic inflation measures are also discussed. The purpose of such inflation measures is to track the development in the domestic market-determined inflation, which is closely related to the price of gross value added in the domestic market-based private business sector. A price index for value added often displays a different short-term development than the headline CPI. Such differences can be useful in an assessment of the current inflationary environment and in relation to an interpretation of the historical inflation development.     

中国核心通货膨胀的估计

准确地测度通货膨胀是认识一般价格水平的变化状况和制定反通货膨胀政策措施的基础。然而，现在被广泛用来测度通货膨胀的RPI或CPI及其对它的改进与通货膨胀的经济内容不一致。这就使得在这些方法下测度的通货膨胀不可能准确地反映实际通货膨胀的状况。于是，本文依据货币数量论提出了一种利用长期识别限制的结构性向量自回归模型来测度核心通货膨胀的新方法。在这个方法里，核心通货膨胀被定义为货币冲击引起的一般价格水平的变化。从向量自回归模型中识别出来的货币冲击和一般价格水平对货币冲击的反应函数被用来构造RPI或CPI变化率由货币冲击引起的成分，这样测度的核心通货膨胀与货币主义理论下通货膨胀的经济内容完全一致。用这种方法估计1954-2002年间中国核心通货膨胀过程中所提供的经济证据表明，我们对核心通货膨胀的定义和估计方法看起来非常合理。而且，测度的结果还能够帮助我们认识我国历史上每一次通货膨胀和通货紧缩的形成机制。     

Inflation forecasts and core inflation measures: Where is the information on future inflation?

This paper uses the forecast from a random walk model of inflation as a benchmark to test and compare the forecast performance of several alternatives of future inflation, including the Greenbook forecast by the Fed staff, the Survey of Professional Forecasters median forecast, CPI inflation minus food and energy, CPI weighted median inflation, and CPI trimmed mean inflation. The Greenbook forecast was found in previous literature to be a better forecast than other private sector forecasts. Our results indicate that both the Greenbook and the Survey of Professional Forecasters median forecasts of inflation and core inflation measures may contain better information than forecasts from a random walk model. The Greenbook's superiority appears to have declined against other forecasts and core inflation measures.     

The Impact of the 2008 Crisis on UK Prices: What We Can Learn from the CPI Microdata1

This paper takes the locally collected price quotes used to construct the CPI index in the UK for the period 1996–2013 and explores the impact of the Great Recession (2008-9) on the pricing behaviour of firms. We develop a time series framework which captures the link between macroeconomic variables and the behaviour of prices in terms of the frequency of price change, the dispersion of price levels and the size, dispersion and kurtosis of price-growth. We find strong evidence for inflation having an effect, but not output. The change in the behaviour of prices during the Great Recession is largely explained by the changes in inflation and VAT. Nevertheless, the magnitude of the inflation effect is sufficiently small that it need not influence monetary policy.     

The Impact of the 2008 Crisis on UK Prices: What We Can Learn from the CPI Microdata1

This paper takes the locally collected price quotes used to construct the CPI index in the UK for the period 1996–2013 and explores the impact of the Great Recession (2008‐9) on the pricing behaviour of firms. We develop a time series framework which captures the link between macroeconomic variables and the behaviour of prices in terms of the frequency of price change, the dispersion of price levels and the size, dispersion and kurtosis of price‐growth. We find strong evidence for inflation having an effect, but not output. The change in the behaviour of prices during the Great Recession is largely explained by the changes in inflation and VAT. Nevertheless, the magnitude of the inflation effect is sufficiently small that it need not influence monetary policy.     

On the desirability of nominal GDP targeting

This paper evaluates the welfare properties of nominal GDP targeting in the context of a New Keynesian model with both price and wage rigidity. In particular, we compare nominal GDP targeting to inflation and output gap targeting as well as to a conventional Taylor rule. These comparisons are made on the basis of welfare losses relative to a hypothetical equilibrium with flexible prices and wages. Output gap targeting is the most desirable of the rules under consideration, but nominal GDP targeting performs almost as well. Nominal GDP targeting is associated with smaller welfare losses than a Taylor rule and significantly outperforms inflation targeting. Relative to inflation targeting and a Taylor rule, nominal GDP targeting performs best conditional on supply shocks and when wages are sticky relative to prices. Nominal GDP targeting may outperform output gap targeting if the gap is observed with noise, and has more desirable properties related to equilibrium determinacy than does gap targeting.     

A note on health care inflation

A key issue in health care reform is the need to contain the inflation rate of the CPI for health care services without substantially reducing the quality of health care. Althought the previous literature has widely debated the causes of increasing inflation in the CPI for health care services, very little has been done to empirically test these arguments. We use an econometric framework that allows us to expressly examine the determinants of the inflation rate of the CPI for health care services. The data cover the period from 1960–1994. The main results provide empirical verification for many of the demand-side and supply-side theories of the inflation rate of the CPI for health care services that have been widely discussed in the literature.     

Mind the Output Gap: The Disconnect of Growth and Inflation during Recessions and Convex Phillips Curves in the Euro Area

We develop a theoretical model that features a business cycle‐dependent relation between output, price inflation and inflation expectations, augmenting the model by Svensson (1997) with a nonlinear Phillips curve that reflects the rationale underlying the capacity constraint theory (Macklem, 1997). The theoretical model motivates our empirical assessment, based on a regime‐switching Phillips curve and a regime‐switching monetary structural VAR, employing different filter‐based, semi‐structural model‐based and Bayesian factor model‐implied output gaps. The analysis confirms the presence of a convex relationship between inflation and the output gap, meaning that the coefficient in the Phillips curve on the output gap recurringly increases during times of expansion and abates during recessions. Sign‐restricted monetary policy shocks based on a regime‐switching monetary SVAR reveal that expansionary monetary policy induces less pressure on inflation at times of weak as opposed to strong growth; thereby rationalizing relatively stronger expansionary policy, including unconventional volume‐based policy, during times of deep recession. A further augmented model shows that an effective euro exchange rate shock, too, implies business cycle state‐dependent responses, with more upward pressure on prices arising from unexpected currency depreciation at times of expansion than during recession phases.     

通货膨胀国际间传导对我国影响的实证检验

本文运用时间序列分析方法,实证检验了欧盟和美国的价格冲击向我国传导的总体效应.实证结果表明,各国物价存在明显的协整关系,脉冲响应分析和方差分解的结论进一步刻画了外国通胀冲击的特征.协整变结构检验证实了近年来通货膨胀国际传导效应显著增强.本文还利用格兰杰因果检验,考察了通货膨胀的各条跨国传导路径,研究发现,消费品和原材料价格传导路径非常通畅,而通过国际储备影响货币供应量的传导渠道,以及总供给-总需求传导渠道不能得到实证支持.     

Measurement Biases in Consumer Price Indexes

The Consumer Price Index (CPI) measures the cost of purchasing a fixed basket of goods at a fixed sample of outlets over time, and can be thought of as a practical approximation to a "true" cost-of-living index, and a measure of general inflation for the economy. In more recent times, concerns over the possibility that the U.S. CPI overstates the rate of inflation have grown. Annual changes in the CPI are used to adjust social security benefits, and wage contracts are often indexed to CPI changes. To the extent that the CPI overstates the rate of inflation individuals are being compensated for changes in the cost-of-living that have not occurred–with enormous implications for government fiscal budgets. This paper presents an up-to-date survey of the principal sources of measurement error or bias in the CPI. A number of sources of bias are examined, including the commodity substitution bias , the outlet substitution bias , and the elementary index bias . Traditional bilateral index number theory assumes that the number of goods remains constant over the pricing period and furthermore, that the goods are of unchanging quality. Changes in either of these give rise to two further biases: the new goods bias and the quality bias .     

UK medium‐term prospects: steady,but unspectacular

• Rapid expansion of the labour supply and robust business investment means that potential output is likely to have grown strongly last year. Therefore, based upon the latest data for GDP, we estimate that the output gap only narrowed very slightly in 2014, ending the year at 4% of potential output.
• The prospects for potential output growth are favourable, with the labour supply set to be boosted by sustained strength in inward migration and the staged increase in the State Pension Age, and robust growth in business investment continuing to deepen the capital stock.
• This will provide the conditions for relatively strong growth and low inflation over the medium term, with GDP growth expected to average 2.6% a year from 2015–19. This is some way below the average of the decade prior to the financial crisis, but it would represent a clear step up on the average growth rate achieved between 2007–14.
• Our estimate of the output gap is much larger than that of the OBR. This suggests that the UK's structural deficit is smaller and that the degree to which fiscal policy needs to be tightened may not be as great as the OBR estimates.

     

Nonlinearity in the Fed's monetary policy rule

This paper investigates the nature of nonlinearities in the monetary policy rule of the US Federal Reserve (Fed) using the flexible approach to nonlinear inference. We find that while there is significant evidence of nonlinearity for the period to 1979, there is little such evidence for the subsequent period. Possible asymmetries in the Fed's reactions to inflation deviations from target and the output gap in the 1960s and 1970s may tell part of the story, but do not capture the entire nature of the nonlinearity. The inclusion of the interaction between inflation deviations and the output gap, as recently proposed, appears to characterize the nonlinear policy rule more adequately. Copyright © 2005 John Wiley & Sons, Ltd.     

货币政策地区效应——基于地区总供给曲线的理论与实证分析

本文着重检验了我国区域经济中的基于产出缺口的地区短期总供给曲线的存在性,进而分析地区短期总供给曲线对货币政策地区效应的影响。文章首先对地区短期总供给曲线存在的可能性进行了理论解释,应用卡尔曼滤波方法估算了我国各地区的产出缺口,然后运用ARMA模型说明预期通货膨胀率形成机制,最后以通货膨胀率与其预期之差、外部需求冲击等作为解释变量对产出缺口进行回归,结果发现,我国东部地区的短期总供给曲线较中西部地区的短期总供给曲线更平坦,因而东部地区货币政策效应要强于中西部地区。     

How can big data enhance the timeliness of official statistics?: The case of the U.S. consumer price index

The daily consumer price index (CPI) produced by the Billion Prices Project (BPP CPI) offers a glimpse of the direction taken by consumer price inflation in real time. This is in contrast to the official U.S. CPI, which is compiled monthly and released with an average of a three-week delay following the end of the reference month. A recent body of research contended that the movements of online prices are representative of those of offline retail prices, making the BPP CPI a natural candidate for accurately improving the timeliness of the official CPI. We assess the predictive content of the BPP CPI using a variety of MIDAS models that accommodate data sampled at different frequencies. These models generate estimates that remain robust to the variety of time periods considered and, by the standard of the existing literature, contribute to a significant upgrade in the forecast accuracy of official consumer price inflation figures. The paper then sketches the broad implications of BPP CPI for the consumer price statistics maintained by national statistics offices and discusses how the proposed improvement in the timeliness of the official CPI fits in this perspective.     

Forecasting the UK economy with a medium-scale Bayesian VAR

We estimate a Bayesian VAR (BVAR) for the UK economy and assess its performance in forecasting GDP growth and CPI inflation in real time relative to forecasts from COMPASS, the Bank of England’s DSGE model, and other benchmarks. We find that the BVAR outperformed COMPASS when forecasting both GDP and its expenditure components. In contrast, their performances when forecasting CPI were similar. We also find that the BVAR density forecasts outperformed those of COMPASS, despite under-predicting inflation at most forecast horizons. Both models over-predicted GDP growth at all forecast horizons, but the issue was less pronounced in the BVAR. The BVAR’s point and density forecast performances are also comparable to those of a Bank of England in-house statistical suite for both GDP and CPI inflation, as well as to the official Inflation Report projections. Our results are broadly consistent with the findings of similar studies for other advanced economies.     

我国经济与物价的中长期发展前景

在国内宏观调控政策保持相对稳定、美欧日经济平稳增长的情况下,2011年我国经济增速将回调到9.7%左右,2012～2015年将保持10%左右的较快增长状态。2011年和2012年我国通货膨胀压力较大,CPI涨幅将超过5%。2012年以后食品价格和CPI涨幅趋于下降,但非食品价格仍将保持较快上涨态势,内在通胀压力依然存在。可通过适度控制交易性货币供给增速和工资上涨幅度、加大人民币升值幅度等措施缓解物价上涨压力,但需要处理好抑制物价上涨和稳定经济增长的关系。