INFLATION PERSISTENCE AND CORE INFLATION: THE CASE OF SOUTH AFRICA

This paper analyses the persistence of inflation in South Africa since 1981. A measure of the persistence of inflation provides important information about the impact of shocks on the economy over time. This information can be extremely useful for the purpose of setting monetary policy, especially in a small, open economy like South Africa. In addition, an estimate of persistence at the disaggregate level helps in the identification of the main drivers of aggregate inflation. This information is useful in deriving a core measure of South African inflation, which outperforms some of the more readily available core measures in identifying the underlying inflationary pressures in the economy.     

Time inconsistency in a model with lags, persistence, and overlapping wage contracts

The two strands in the literature of monetary analysis, namelythat there are long lags of monetary policy and the adverseeffects of time inconsistency, have not previously been, butneed to be, integrated. To achieve such an objective, in thispaper we present a model of a Central Bank game with the realisticfeatures of both lags and persistence effects naturally imbeddedin overlapping wage contracts. In our more realistic model,the inflationary bias is much smaller, inflation is less volatile,and the optimal adjustment of monetary instrument needs to besmoother than previously assessed.     

保增长与控通胀表现发凡及相应学术论争

基于国际经验,把经济增长与通货膨胀的关系概括为五种类型。对我国1978～2011年经济增长和通货膨胀之间的关系进行实证分析,结果表明,经济增长可能导致产生通货膨胀的压力、通货膨胀与经济增长没有稳定的促进或促退关系,以及经济增长与通货膨胀不存在必然的因果关系。应对通货膨胀压力,应从实行稳定货币量的货币政策,稳定社会通胀预期,强化农业的基础地位,保护好中、低收入阶层,控制和消除资产泡沫等方面着手。     

Optimal Contracts for Central Bankers: Inflation versus Money Supply and Exchange Rate Targets

Some recent papers have shown how a simple contract can eliminate the inflationary bias of discretionary monetary policy. This paper shows that if the central banker is risk averse, a contract in terms of money is superior to one in terms of inflation. The paper also shows that, if the central banker cares about his reappointment, an exchange rate target might always leads to the implementation of the optimal policy.     

Testing policy effectiveness during COVID-19: An NK-DSGE analysis

We examine the effectiveness of fiscal and monetary policy in mitigating the impact of COVID-19 in India using the NK-DSGE framework. In terms of policy effectiveness, our findings imply that expansionary monetary policy is effective in reviving economic growth both from the demand side and supply side. In contrast, expansionary fiscal policy is effective only from the supply side. Our findings recommend the implementation of optimal policy mix in a coordinated and staggered framework for effective mitigation of ill-effects of the COVID-19, such as reviving employment and capacity utilization to its pre-pandemic level with minimal inflationary effects.     

ESTIMATING MONETARY POLICY RULES FOR SOUTH AFRICA

The paper combines the estimation of the Monetary Conditions Index (MCI) with the theoretic modelling of optimal monetary policy in South Africa. The idea that monetary policy is not only interested in optimal monetary conditions but also in external stability, provides the basis for the analysis. The paper introduces the concept of the MCI and estimates the relative influence of interest rates and exchange rates on the output gap. The estimated weights are 1.9:1. This estimation results is used to specify operating target rules for South African monetary policy.     

FOOD INFLATION IN SOUTH AFRICA: SOME IMPLICATIONS FOR ECONOMIC POLICY

This paper analyses the trends in food price movements in South Africa between 1980 and 2008. There are three main results emanating from the analysis in this paper. Firstly, food price movements have played a large role in generating inflationary episodes in South Africa. Secondly, while external influences do matter, South African food price movements are mainly due to domestic influences. This implies that national policy has an important role to play in taming domestic food price inflation. Thirdly, given the strong second round impacts, food price movements warrant special attention in monetary policymaking. Core measures of inflation that exclude food price movements may not accurately reflect the underlying inflationary pressures in the economy and could compromise the attainment of the goal of price stability.     

货币政策对我国证券业产业结构、行为和绩效的作用主辅线分析

本文综述了政策与我国证券产业结构、行为和绩效作用路径方面的研究成果,将货币政策按照作用对象的不同分为两类,对这两类货币政策与证券业结构、行为和绩效进行格兰杰因果检验,进而提出了货币政策对我国证券业产业结构、行为和绩效的作用主辅线。     

Assessing Nonlinear Dynamics of Central Bank Reaction Function: The Case of Mozambique

This paper sheds some light on the elements governing monetary policy‐making during the period 2000Q1–2015Q1 in Mozambique. We estimate a time‐varying Taylor‐type rule for the BM, using a Markov‐switching (MS) model and a Threshold model. The general finding is that the behaviour of the BM can be characterised by two regimes. In regime 1, only changes in inflation trigger a reaction by the monetary authority. This behaviour is prominent after the establishment of the monetary policy committee in 2007 (CPMO). In regime 2, the BM reacts aggressively both to cool off the economic activity and to curb inflationary pressures. Regime 2 occurred most frequently during 2000–2006, when the fiscal policy might have played an important role in output stabilization. After the establishment of the CPMO, regime 2 occurred in the context of a steep rise in fuel and food prices in 2007–2008 and in 2010. Both the MS model and the Threshold model show similar asymmetric effects. We find evidence that inflation is viewed more seriously by the monetary authorities when it is accompanied by a high output‐gap in the previous period, which triggers a more aggressive response from the monetary authorities.     

The Precarious Fiscal Foundations of EMU

After a brief overview of the fiscal theory of the price level, we consider the insights it provides into monetary policy formation under certain kinds of deflationary and inflationary stress. Then we consider how the institutions of the EMU are equipped – or unequipped – to deal with such stress. The conclusion is that fiscal institutions as yet unspecified will have to arise or be invented in order for EMU to be a long-term success.     

Too Many Cooks? Committees in Monetary Policy

How many people should decide monetary policy? In this article, we take an empirical perspective on this issue and analyze the relationship between the number of monetary policy decision makers and monetary policy outcomes. Using a new data set that characterizes central bank monetary policy committees (MPCs) in more than 30 countries from 1960 through 2006, we find a U‐shaped relationship between MPC size and inflation; our results suggest that the lowest level of inflation is reached at MPCs with an intermediate size of about five to nine members. Similar results are obtained for inflation variability. Other MPC characteristics also matter for monetary policy outcomes, though to a smaller degree. For instance, the membership composition of the MPC as well as the frequency of MPC membership turnover appears to affect economic variables.     

On Optimal Monetary Policy Rules and the Construction of MCIs in the Open Economy

This paper presents a simple open-economy forward-looking model to underscore the important role of the real exchange rate channel in the conduct of optimal monetary policy. As opposed to the closed economy, optimal monetary policy in the open economy depends on both demand-side and supply-side parameters.The paper also highlights the importance of the exchange rate channel for the design and implementation of a Monetary Conditions Index in the conduct of monetary policy. The model gives rise to an alternative MCI where the weight on the real exchange rate depends on all parameters of the model and the policymakers preferences.     

A NOTE ON THE TRIMMED MEAN MEASURE OF CORE INFLATION IN SOUTH AFRICA

This paper constructs and analyses the properties of a trimmed mean inflation rate for South Africa. Based on an analysis of the distributions of the consumer price index component price changes, a measure is constructed that provides an estimator of core inflation, which may be particularly useful to policymakers in an inflation‐targeting environment. The trimmed mean estimator focuses on the price movements of individual components that have a strong bearing on the current and future trend of the headline inflation rate, allowing monetary policy to be directed at the persistent or underlying sources of inflationary pressures.     

Monetary Policy Uncertainty and Inflation: The Role of Central Bank Accountability

We analyse the issue of central bank accountability with the aid of a simple monetary policy game with uncertainty about the agent's inflation stabilisation preferences. We find that there may be an important economic role for accountability in addition to its political function of making the central bank answerable to voters through its accountability to the executive. The model suggests that for countries with relatively little central bank independence, or perhaps a poor inflationary track record, significant reductions in inflation can be achieved by lowering monetary policy uncertainty. These reductions are much smaller for inflation-averse central banks, when monetary policy uncertainty is reduced by the same absolute amount. Thus, the effectiveness of accountability – as a means of lowering both inflation and inflation uncertainty – is higher the lower the degree of central bank conservativeness.     

The Optimal Monetary and Macroprudential Policies for the South African Economy

We investigate the optimal design and effectiveness of monetary and macroprudential policies in promoting macroeconomic (price) and financial stability for the South African economy. We develop a New Keynesian dynamic stochastic general equilibrium model featuring a housing market, a banking sector and the role of macroprudential and monetary policies. Based on the parameter estimates from the estimation, we conduct an optimal rule analysis and an efficient policy frontier analysis, and compare the dynamics of the model under different policy regimes. We find that a policy regime that combines a standard monetary policy rule and a macroprudential policy rule delivers a more stable economic system with price and financial stability. A policy regime that combines an augmented monetary policy (policy rate reacts to financial conditions) with macroprudential policy is better at attenuating the effects of financial shocks, but at a much higher cost of price instability. Our findings suggest that monetary policy should focus solely on its primary objective of price stability and let macroprudential policy facilitate financial stability on its own.     

Monetary Policy and Natural Disasters in a DSGE Model

In the immediate aftermath of Hurricane Katrina, speculation arose that the Federal Reserve might respond by easing monetary policy. This article uses a dynamic stochastic general equilibrium (DSGE) model to investigate the appropriate monetary policy response to a natural disaster. We show that the standard Taylor rule response in models with and without nominal rigidities is to increase the nominal interest rate. That finding is unchanged when we consider the optimal policy response to a disaster. A nominal interest rate increase following a disaster mitigates both temporary inflation effects and output distortions that are attributable to nominal rigidities.     

Real business cycle models and money: A survey of theories and stylized facts

Real Business Cycle Models and Money: A Survey of Theories and Stylized Facts. — This article presents a survey of real business cycle theory, with special attention to the role of money. This role is mainly associated with cash-in-advance constraints, liquidity effects and aspects of financial intermediation. Apart from reviewing the literature, stylized facts about the comovements of output and prices versus monetary aggregates and interest rates over the cycle are assembled and discussed for eight industrial countries, including the G5-countries, Denmark, Belgium and the Netherlands. The paper concludes that further developments in monetary real business cycle theory could benefit from taking into account a broader set of stylized facts about prices than has been done thus far, as well as from introducing non-Walrasian elements and endogenizing monetary policy.     

The interest rate–inflation relationship under an inflation targeting regime: The case of Turkey

This paper examines the relationship between nominal interest rates and the expected inflation rate for the Turkish economy between 2002 and 2009, a period when the inflation-targeting regime was implemented as monetary policy. We use the test of cointegrating rank with a trend-break (a method introduced by Inoue, 1999) and we also apply exogeneity tests. Empirical findings indicate that monetary policy rates depend on inflationary expectations; long-term interest rates are affected by monetary policy; and the weak form of the Fisher effect is valid. This evidence implies that monetary policy has actually influenced the real long-term interest rates; the inflation targeting regime pursued by the Central Bank of Turkey is reliable; and hence realized inflation has remained close to its targeted level.     

WHAT PRICE‐LEVEL DATA CAN TELL US ABOUT PRICING CONDUCT IN SOUTH AFRICA

This article reports the findings of a study of two unique microdata sets, which are the unit level basis of South Africa's measured Consumer Price Index and Producer Price Index, over the period December 2001‐December 2007. In particular, based on techniques that have been used in comparable international studies, findings are reported on the frequency and magnitude of price changes, the duration of prices, and heterogeneity in pricing. The results for South Africa are compared with the stylised facts for pricing conduct, which have been presented in recent international studies. The article offers an illustration of how microdata‐based findings on pricing conduct may impact on the modelling of monetary policy by introducing micro‐founded results into an open economy dynamic stochastic general equilibrium model for the South African economy. The article concludes by identifying areas for further research, where it has not as yet been determined how South African pricing conduct compares with certain stylised pricing facts identified in the international literature.