LONG-RUN M3 DEMAND IN SOUTH AFRICA: A COINTEGRATED VAR MODEL

This paper presents a system cointegration analysis of a long‐run demand for money (measured in terms of M3) in South Africa. In particular, the paper estimates a cointegrated vector autoregression model, consisting of real money, income and the opportunity cost of holding money. Using a variety of theory consistent identification schemes, the money demand function is identified along with other two cointegrating relations, namely, an IS‐type relationship and a relationship relating inflation to the spread between long‐ and short‐term interest rates. The model shows that of the variables used, only income and real money are error‐correcting to the money demand relation. The money demand relation is found to be relatively stable over the sample period, when short‐run fluctuations are corrected for. The model further shows that the long‐run link between money and inflation is rather weak.     

SHORT‐RUN AND LONG‐RUN DETERMINANTS OF THE REAL EXCHANGE RATE IN MEXICO

This paper explores the real exchange rate behavior in Mexico from 1960 until 2005. Since the empirical analysis reveals that the real exchange rate is not mean reverting, we propose that economic fundamental variables affect its evolution in the long run. Therefore, based on equilibrium exchange rate paradigms, we propose a simple model of real exchange rate determination, which includes the relative GDP per capita, the real interest rates, and the net foreign assets over a long period of time. Our analysis also considers the dynamic adjustment in response to shocks through impulse response functions derived from the multivariate vector autoregressive (VAR) model.     

Bilateral Trade Balances: Evidence from Malaysia*

This study examines the impacts of real exchange rates on the bilateral trade balances of Malaysia with the USA, Japan and Singapore. The results for the long‐run cointegrating vectors show that depreciation or devaluation of real exchange rates will improve bilateral trade balances. In the short run, there is some evidence of the J‐curve phenomenon. Changes in real money supply contribute greatly to changes in real exchange rates. Generally, changes in real exchange rates contribute significantly to changes in bilateral trade balances. Monetary policy can be used to influence bilateral trade balances.     

DEMAND FOR MONEY AND EXPENDITURE COMPONENTS IN SOUTH AFRICA: ASSESSMENT FROM UNRESTRICTED ERROR-CORRECTION MODELS

The main aim of this study is to examine empirically the long‐run relationship of money demand and its determinants in South Africa. In contrast with existing studies on the subject, the present study considers various components of real income as determinants. The disaggregated components are final consumption expenditure, expenditure on investment goods and exports. The other determinants are domestic interest rate, yield on government bonds and the exchange rate. The results confirm that the different components of real income have different impacts on the demand for money in South Africa. The presence of long‐run equilibrium relationships between the demand for real M1, M2 and M3 and their determinants is confirmed based on the results of bounds testing.     

THE ROLE OF COMMODITY TERMS OF TRADE IN THE DETERMINATION OF THE REAL EXCHANGE RATES OF THE MEDITERRANEAN COUNTRIES

The aim of this paper is to investigate whether there exists a long‐run relationship between the real exchange rate and the commodity terms of trade in the so‐called Mediterranean or MENA countries. These economies are good candidates for this type of formulation, as are commodity exporting countries. Using cointegration techniques, we find long‐run relationships linking the real exchange rate and a commodity‐based measure of the terms of trade. Therefore, commodity terms of trade are a potential explanation for the apparent nonstationarity of MENA countries’ real exchange rates previously found in the empirical literature.     

Determinants of Malaysian Trade Balance: An ARDL Bound Testing Approach

Abstract

This paper examines the short- and long-run relationships between trade balance, real exchange rates, income and money supply in the case of Malaysia. The inclusion of income and money variables in the study is purposely to examine the monetary and absorption approaches to the balance of payments beside the conventional approach of elasticity, using exchange rates. Using the bound testing approach to cointegration and error correction models, developed within an autoregressive distributed lag (ARDL) framework, we investigate whether a long-run equilibrium relationship exists between trade balance and the determinants. Additionally, we adopt an innovation accounting by simulating variance decompositions (VDC) and impulse response functions (IRF) for further inferences. Using this approach, we find evidence of a long-run relationship between trade balance and income and money supply variables but not between trade balance and real exchange rate. The findings also suggest that Marshall–Lerner condition does not hold in the long-run for Malaysia and for policy wise the Malaysian trade balance/balance of payments should be viewed from absorption and monetary approaches.     

Mozambique Metical Exchange Rate Dynamics: Evidence of Fractional Co‐Integration in the USA and South African Rates

This paper studies the exchange rate dynamics of the Mozambique metical with respect to the US dollar and the South African rand. However, instead of using standard I(0)/I(1) techniques, we use long memory and fractionally integrated and co‐integrated models. Our results indicate that the two exchange rates are highly persistent, with orders of integration equal to or above 1. They also seem to be co‐integrated, with an order of integration close to albeit above 0 but with an AR coefficient very close to 1. Thus, although the two series seem to be fractionally co‐integrated, shocks in the long‐run relationship between the two variables are persistent and take a long time to disappear.     

On the Sources of Inflation in Kenya: A Model‐Based Approach

We develop a semi‐structural new‐Keynesian open‐economy model – with separate food and non‐food inflation dynamics to study the sources of inflation in Kenya in recent years. To do so, we filter international and Kenyan data (on output, inflation and its components, exchange rates and interest rates) through the model to recover a model‐based decomposition of most variables into trends (or potential values) and temporary movements (or gaps) – including for the international and domestic relative price of food. We use the filtration exercise to recover the sequence of domestic and foreign macroeconomic shocks that account for business cycle dynamics in Kenya over the last few years, with a special emphasis on the various factors (international food prices, monetary policy) driving inflation. We find that while imported food price shocks have been an important source of inflation, both in 2008 and more recently, accommodating monetary policy has also played a role, most notably through its effect on the nominal exchange rate. We also discuss the implications of this exercise for the use of model‐based monetary policy analysis in sub‐Saharan African countries.     

INFLATION TARGETING AND THE FISHER EFFECT IN SOUTH AFRICA: AN EMPIRICAL INVESTIGATION

The paper analyses the relationship between expected inflation and nominal interest rates during a period of inflation targeting in South Africa, i.e. from 2000 to 2005. Specifically, it investigates the Fisher hypothesis that nominal interest rates move one‐to‐one with expected inflation, leaving the real interest rate unaffected. The analysis distinguishes between a short‐run Fisher effect and a long‐run Fisher effect. Using cointegration and error correction models (for monthly data for the period April 2000 to July 2005), it was found that the short‐run Fisher hypothesis did not hold during the relevant period under the inflation targeting monetary policy framework in South Africa. This is attributed to a combination of the South African Reserve Bank's (SARB) control over short‐term interest rates and the effects of the monetary transmission mechanism. The long‐run Fisher hypothesis could not be confirmed in its strictest form: while changes in inflation expectations move in the same direction as the nominal long‐term interest rate. This suggests that monetary policy has an influence on the real long‐term interest rate, which has positive implications for general economic activity, thus confirming the credibility of the inflation targeting framework.     

WAGNER'S LAW: AN ECONOMETRIC TEST FOR SOUTH AFRICA, 1960‐2006

The main objective for this paper is to test Wagner's law by analysing the causal relationships between real government expenditure and real income for South Africa for the period 1960‐2006. The paper tests the long‐run relationship between the two variables using the autoregressive distributive lag approach to cointegration suggested by Pesaran et al. We use the Granger non‐causality test procedure developed by Toda and Yamamoto, which uses a vector autoregression model to test for the causal link between the two. Evidence of cointegration is sufficient to establish a long‐run relationship between government expenditure and income. However, support for Wagner's law would require unidirectional causality from income to government expenditure. Therefore, cointegration should be seen as a necessary condition for Wagner's law, but not sufficient. This research does find a long‐run relationship between real per capita government expenditure and real per capita income. Results for the short‐run causality find bidirectional causality. On the basis of empirical results in this paper, one may tentatively conclude that Wagner's law finds no support in South Africa.     

Asset Market and Balance of Payments Characteristics: An Eclectic Exchange Rate Model for the Dollar,Mark and Yen

In this paper we use an exchange rate model, which combines asset market characteristics with balance of payments interactions, to examine the nominal effective exchange rates of the German mark, Japanese yen and US dollar for the recent experience with floating exchange rates. Our approach may be interpreted as one which attempts to flesh out the missing links that arise in conditioning an exchange rate solely on relative prices, as occurs in a standard PPP analysis. Amongst the results reported in this paper are: significant, and sensible, long-run relationships for the currencies studied; complex short-run dynamics; a variance decomposition analysis which apportions nominal exchange rate error variances into real and nominal elements.     

ESTIMATING EXCHANGE RATE AND BILATERAL TRADE BALANCE RELATIONSHIPS: THE EXPERIENCE OF SUB-SAHARAN AFRICAN COUNTRIES

This paper examines the effects of exchange rate changes on the bilateral trade balance of ten African countries vis‐à‐vis the US using annual data over period 1977‐2002. Both the Johansen and panel cointegration tests find cointegration among the series. The country FMOLS results show that real exchange rate depreciation improves the trade balance in six of ten countries in contrast to Tanzania in which it worsens the trade balance, with no effect found in Ghana, Morocco and Senegal. Foreign real income improves the trade balance in two countries but worsens it in another three. Finally, domestic real income negatively affects the trade balance in four countries but improves it in another three. The three‐panel coefficients are correctly signed and significant at the 1% level.     

DO AFRICAN COUNTRIES MOVE ASYMMETRICALLY TOWARDS PURCHASING POWER PARITY?

This paper investigates the possibility that the adjustment towards long‐run relative purchasing power parity (PPP) is dependent upon the nature of deviations from PPP that are experienced. While existing studies involving developed and less developed countries often find against PPP having employed linear tests of non‐stationarity or non‐cointegration, we employ a new cointegration test, recently advocated by Enders and Siklos and Enders and Dibooglu, that tests for an asymmetric adjustment towards parity with respect to positive and negative deviations of the real exchange rate from its equilibrium value. Using a sample often African economies with data taken from the post‐Bretton Woods floating exchange rate era, long‐run PPP holds in eight of these cases if an explicit distinction is made between positive and negative deviations. Across the sample, we find variation in the type of asymmetry experienced and the roles played by price and nominal exchange rate adjustment.     

Bilateral Trade in the Asia-Pacific: A Case Study for Australia, USA, Japan and Singapore

This analysis of bilateral trade involves four Asia-Pacific nations (USA, Japan, Singapore and Australia) on a quarterly data set 1977 to 1994. The reduced-form model applied here derives from a structure which accommodates income, real exchange rate and real-balance effects. We find that bilateral balances between these countries are not cointegrated with some potential determinants, in particular real exchange rates. In the short run, appropriately defined, we find that Singapore’s trade with the USA and Japan is influenced by real exchange rates; Australian-Japanese and Australian-US trade is influenced by real income and real-cash-balance effects but not real exchange rates while USA-Japanese bilateral trade is influenced only by real-cash-balance effects. The general conclusion is that real exchange rates have only limited effects on these selected Asia-Pacific bilateral trading patterns, while real-balance and income effects have a greater impact over the short run.     

Real exchange rates and unit root tests

Real Exchange Rates and Unit Root Tests. — This paper examines monthly OECD exchange rate data (1979–1997) using univariate and panel data unit root tests. Some of these tests support the hypothesis of a unit root. But tests of cointegration reveal the existence of weak purchasing power parity relationships between bilateral nominal exchange rates and relative prices. We suggest that researchers need not conduct unit root tests on real exchange rate data when a modified version of PPP is used; or if there is a long enough time series. Given the definition of real exchange rates, the indicator should be stationary and should have intrinsic mean reverting behaviour.     

Currency Misalignments in the BRIICS Countries: Fixed Vs. Floating Exchange Rates

In the present paper we attempt to investigate whether the real effective exchange rates of the BRIICS countries, namely Brazil, Russia, India, Indonesia, China and South Africa, converge or not to their equilibrium levels. Our analysis is based on the use of an external balance model as well as the implementation of recent panel cointegration techniques. Our evidence indicates the existence of a valid long-run relationship between the real effective exchange rate, the net foreign assets, the GDP differential and the real interest rate differential for each of the six countries of our sample. Furthermore, our empirical results imply that after the adoption of a free floating exchange rate regime by Brazil, Russia, India, Indonesia and South Africa and the liberalisation of the Chinese exchange rate policy that took place during the last decade, currency misalignments have been gradually reduced, leading the real effective exchange rates of the respective currencies very close to their equilibrium levels.     

Nonstationarity of Real Exchange Rates in the G7 Countries: Are They Cointegrated with Real Variables?

Using monthly data for the G7 countries in the post-Bretton Woods floating rate period, this paper demonstrates that almost all bilateral real exchange rates have unit roots and, hence, are nonstationary. Consequently, it rejects simple PPP as a long-run relationship. The paper also shows that many of these real exchange rates are cointegrated with other real economic variables such as relative labor productivity, terms-of-trade ratios, real trade balance ratios, and long-term real interest rate differentials. In particular, relative labor productivity is statistically significant with the correct sign for more than half of the country pairs for which cointegration is confirmed. This finding lends support to the Balassa–Samuelson productivity-bias hypothesis. These results imply that nonstationarity of real exchange rates and the consequent rejection of simple PPP can be consistent with the notion that real exchange rates revert to an equilibrium in the long run without deviating arbitrarily far from this equilibrium position.J. Japan. Int. Econ.,December 1997, pp. 523–547. Institute of Social Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan, and Faculty of Business and Commerce, Meiji University, 1-1 Kanda, Surugadai, Chiyada-ku, Tokyo 101, Japan.     

ADJUSTING SOUTH AFRICA'S FISCAL BALANCE FOR TERMS-OF-TRADE EFFECTS

Standard output gap‐based calculations and interpretations of the cyclical component of the fiscal balance may convey a misleading picture in countries such as South Africa which experience substantial movements in their terms of trade. This paper therefore adjusts South Africa's general government primary balance for terms‐of‐trade effects by means of an alternative calculation of the transitory component based on a measure of the real income gap rather than the real output gap. The results indicate that measures of the cyclical component of the budget balance based on real income and real output gaps generally yield broadly similar results over history, but during exceptional periods of rapid changes in commodity prices, the measures can be very different.     

The Impact of Inflation Uncertainty on Output Growth and Inflation in Thailand*

We explore the impact of inflation uncertainty on output growth in Thailand, an emerging market economy with moderate inflation. Inflation and output uncertainty are modeled in a bivariate constant conditional correlation generalized autoregressive conditional heteroskedastic (AR(p)‐cccGARCH(1,1)) specification. We include the exchange rate in the mean equations, and use the headline and core inflation rates and industrial production to generate inflation and output uncertainty series. These series are then used in Granger causality tests to make inferences about the effect of monetary policy‐induced inflation uncertainty. Causality tests show a positive relation from inflation to inflation uncertainty. Additionally, increased inflation uncertainty decreases output. These results are consistent with real costs associated with moderate inflation. Finally, we find no evidence that monetary policy reduced these costs.     

Beyond Income: What Else Predicts Very Low Food Security Among Children?

We examine characteristics and correlates of households in the United States that are most likely to have children at risk of inadequate nutrition—those that report very low food security (VLFS) among their children. Using 11 years of the Current Population Survey, plus data from the National Health and Nutrition Examination Survey (NHANES), we describe these households in great detail with the goal of trying to understand how these households differ from households without such severe food insecurity. While household income certainly plays an important role in determining VLFS among children, we find that even after flexibly controlling for income‐to‐poverty rates some household characteristics and patterns of program participation have important additional explanatory power. Finally, our examination of the NHANES data suggests an important role for both mental and physical health of adults in the household in determining the food security status of children.