Dissertation (PhD) -- University of Stellenbosch, 2000. / ENGLISH ABSTRACT: The Lucas critique states that if expectations are not explicitly dealt with, conventional econometric models are inappropriate for policy analyses, as their coefficients are not policy invariant. The inclusion of rational expectations in ·conventional model building has been the most common response to this critique. The concept of rational expectations has received several interpretations. In numerous studies, these expectations are associated with model consistent expectations in the sense that expectations and model solutions are identical. To derive a solution, these models require unique algorithms and assumptions regarding their terminal state, in particular when forward-looking expectations are present. An alternative that avoids these issues is the concept of weak rational expectations, which emphasises that expectation errors should not be systematic. Expectations are therefore formed on the basis of an underlying structure, but full knowledge of the model is not essential. The accommodation of this type of rational expectations is accomplished by means of an explicit specification of an expectations equation consistent with the macro econometric model's broad structure. The estimation of coefficients relating to expectations is achieved through an Instrumental Variable approach. In South Africa, monetary policy has been consistent and transparent in line with the recommendations of the De Kock Commission. This allows the modelling of the policy instrument of the South African Reserve Bank, i.e. the Bank rate, by means of a policy reaction function. Given this transparency in monetary policy, the accommodation of expectations of the Bank rate is essential in modelling the full impact of monetary policy and in avoiding the Lucas critique. This is accomplished through weak rational expectations, based on the reaction function of the Reserve Bank. The accommodation of expectations of a policy instrument also allows the modelling of anticipated and unanticipated policies as alternative assumptions regarding the expectations process can be made during simulations. Conventional econometric models emphasise the demand side of the economy, with equations focusing on private consumption, investment, exports and imports and possibly changes in inventories. In this study, particular emphasis in the model specification is also placed on the impact of monetary policy on government debt and debt servicing costs. Other dimensions of the model include the modelling of the money supply and balance of payments, short- and long-term interest rates, domestic prices, the exchange rate, the wage rate and employment as well as weakly rational expectations of inflation and the Bank rate. The model has been specified and estimated by usmg concepts such as cointegration and Error Correction modelling. Numerous tests, including the assessment of the Root Mean Square Percentage Error, have been employed to test the adequacy of the model. Similarly, tests are carried out to ensure weak rational expectations. Numerous simulations are carried out with the model and the results are compared to relevant alternative studies. The simulation results show that the reduction of inflation by means of only monetary policy could impose severe costs on the economy in terms of real sector volatility. / AFRIKAANSE OPSOMMING: Die Lucas-kritiek beweer dat konvensionele ekonometriese modelle nie gebruik kan word vir beleidsontleding nie, aangesien dit nie voorsiening maak vir die verandering in verwagtings wanneer beleidsaanpassings gemaak word nie. Die insluiting van rasionele verwagtinge in konvensionele ekonometriese modelle is die mees algemene reaksie op die Lukas-kritiek. Ten einde die praktiese insluiting van rasionele verwagtings III ekonometriese modelbou te vergemaklik, word in hierdie studie gebruik gemaak van sogenaamde "swak rasionele verwagtings", wat slegs vereis dat verwagtingsfoute me sistematies moet wees nie. Die beraming van die koëffisiënte van die verwagtingsveranderlikes word gedoen met behulp van die Instrumentele Veranderlikes-benadering. Monetêre beleid in Suid-Afrika was histories konsekwent en deursigtig in ooreenstemming met die aanbevelings van die De Kock Kommissie. Die beleidsinstrument van die Suid-Afrikaanse Reserwebank, naamlik die Bankkoers, kan gevolglik gemodelleer word met behulp van 'n beleidsreaksie-funksie. Ten einde die Lukas-kritiek te akkommodeer, moet verwagtings oor die Bankkoers egter ingesluit word wanneer die volle impak van monetêre beleid gemodelleer word. Dit word vermag met die insluiting van swak rasionele verwagtings, gebaseer op die reaksie-funksie van die Reserwebank. Sodoende kan die impak van verwagte en onverwagte beleidsaanpassings gesimuleer word. Konvensionele ekonometriese modelle beklemtoon die vraagkant van die ekonomie, met vergelykings vir verbruik, investering, invoere, uitvoere en moontlik die verandering in voorrade. In hierdie studie word daar ook klem geplaas op die impak van monetêre beleid op staatskuld en die koste van staatsskuld. Ander aspekte wat gemodelleer word, is die geldvoorraad en betalingsbalans, korttermyn- en langtermynrentekoerse, binnelandse pryse, die wisselkoers, loonkoerse en indiensneming, asook swak rasionele verwagtings van inflasie en die Bankkkoers. Die model is gespesifiseer en beraam met behulp van ko-integrasie en die gebruik van lang-en korttermynvergelykings. Die gebruiklike toetse is uitgevoer om die toereikendheid van die model te toets. Verskeie simulasies is uitgevoer met die model en die resultate is vergelyk met ander relevante studies. Die gevolgtrekking word gemaak dat die verlaging van inflasie deur alleenlik gebruik te maak van monetêre beleid 'n swaar las op die ekonomie kan lê in terme van volatiliteit in die reële sektor.

Dissertation (PhD)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: A number of themes run through this dissertation, the first of which is the importance of money in facilitating decentralised decision making by lowering transaction costs and by contributing to the definition and maintenance of property rights. A second (and more melancholy) theme is that government control of money has often been poor, and systematically so since the War. This leads to a third theme, the combined force of economic theory and central bank practice of the last quarter of a century or so has led to clearer limits to the discretionary power of government in the management of money. These limits are increasingly expressed as contingent rules containing explicit targets for monetary policy, for example an inflation target. The objective of this thesis is to evaluate inflation targeting both normatively and positively as a framework for monetary policy. A set of criteria from the New Institutional Economics literature is used to evaluate the extent to which inflation targeting captures the lessons from the three themes mentioned above, in both normative and positive dimensions. The practical importance of the thesis is in the application of this institutional evaluation to the inflation the targeting regime of recent vintage in South Africa, which leads to a number of policy recommendations. Part I consists of three chapters of which the first two are mainly abstract and concerned with the theory of the New Institutional Economics. The third chapter has a historical character and considers the history of and recent trends in monetary policy. These trends are consistent with adopting an inflation target as a framework for monetary policy. The second part of the thesis starts with a theoretical consideration of monetary policy rules in chapter 4, and is followed by a discussion of one such rule, inflation targeting, in chapter 5. This discussion starts with the theory of inflation targeting, but proceeds to details of actual inflation targeting central banks, with special reference the South African Reserve Bank (SARB). The history of anti-cyclical monetary in South Africa is also considered empirically to determine whether inflation targeting would represent an important new direction on this issue. Chapter 6 follows with a literature review of the empirical record of the first decade of inflation targeting internationally. The seventh chapter is the core of the thesis and provides the institutional evaluation of inflation targeting. This evaluation is applied to the present inflation targeting regime in South Africa, and leads to recommended policy reforms. These policy reforms are mapped on a two-dimensional chart that indicates their priority and the expected cost of the associated institutional reform. Additionally a new econometric methodology is used in chapter 7 to gauge the contribution of monetary policy to the more stable economy of recent years. In part 3 the focus of the thesis turns to certain political economy considerations that arise from the independence of the central banks (as is typical for inflation targeting central banks). Chapter 8 considers the issue of central bank independence and is followed by an application of constitutional economics to inflation targeting in chapter 9. Whereas the bulk of the dissertation is concerned with the positive evaluation of inflation targeting, chapter 9 attempts a normative evaluation using the Pareto-Wicksell criterion. Both the positive and normative assessments in this thesis support the case for inflation targeting as a framework for monetary policy, / AFRIKAANSE OPSOMMING: Die doel van hierdie proefskrif is 'n institusionele evaluering van inflasieteikening as raamwerk vir monetêre beleid. Vir hierdie doel is 'n stel kriteria saamgestel uit die literatuur van die Nuwe Institusionele Ekonomie met die oog op 'n positiewe en 'n normatiewe evaluering van inflasieteikening as 'n raamwerk vir monetêre beleid. Die praktiese waarde van die tesis lê in die stel institusionele hervormings wat voorgestel word om die stelsel van inflasieteikening in Suid- Afrika meer doeltreffend en normatief meer gewens te maak. Etlike temas loop deur die proefskrif, maar veral drie verdien vermelding in die opsomming, naamlik: eerstens, die belangrikheid van die monetêre stelsel om gedesentraliseerde besluitneming te vergemaklik en as bydraende faktor in die vestiging van eiendomsreg. Tweedens, hoewel moderne owerhede tipies 'n monopolie op die plaaslike geldeenheid bestuur, het die monetêre bestuur in die moderne tydgewrig (veral sdert WOII) veel te wense oorgelaat. Hierdie wanbestuur was boonop telkens sistematies. Derdens, beide teoretiese ontwikkelings en die praktyk van sentrale bankwese het die afgelope kwarteeu aanleiding gegee tot 'n terugrol van die regering se rol in monetêre beleid en die toenemende gebruik van sistematiese beleidsreëls as raamwerk vir monetêre beleid. Die eerste deel van die proefskrif beskou die teorie van die Nuwe Institusionele Ekonomie in hoofstukke 1 en 2. Die derde hoofstuk is histories van aard en beskou die geskiedenis van moderne monetêre beleid en die tendense wat daaruit afgelei kan word. Afdeling twee fokus meer nougeset op inflasieteikens en begin met die teorie van beleidsreëls in hoofstuk 4. Die vyfde hoofstuk volg met 'n interpretasie van inflasieteikens as een van die sogenaamde terugvoerreëls vir monetêre beleid wat sedert die laat sewentigerjare ontwikkel is en sedertdien gewild geword het. 'n Toenemende aantal ontwikkelde- en ontwikkelende-lande het gedurende die afgelope dekade (en langer) inflasieteikens as raamwerk vir monetêre beleid aangeneem. Hoofstuk ses evalueer die empiriese rekord van hierdie kort geskiedenis. Die sewende hoofstuk is die kern van die tesis en bevat die institusionele evaluering van die inflasieteikens aan die hand van die kriteria saamgestel in hoofstuk 1, met spesifieke toepassing op Suid-Afrika. 'n Nuwe ekonometriese tegniek word ook in hoofstuk 7 gebruik om die bydrae van monetêre beleid tot die meer stabiele ekonome van onlangse tydgewrig te kwantifiseer. Die netelige institusionele kwessie van onafhanklik sentrale banke word rue 111 hoofstuk 7 bespreek rue, maar staan oor tot deel drie van die proefskrif waar die politieke-ekonomie van inflasietekens bespreek word. Hoofstuk 8 handel dan oor onafhanklike sentrale banke, met toepassing op die SARB, terwyl hoofstuk 9 'n toepassing is van die konstiutionele ekonomie op inflasieteikening. Hoofstukke 8 en 9 bied derhalwe verdere positiewe evaluering van die instrument-onafhanklike SARB onder inflasieteikens, asook 'n normatiewe evaluering van inflasieteikens aan die hand van die Pareto-Wicks ell kriteria wat uit hoofstuk 2 spruit. Beide die normatiewe en positiewe evaluerings ondersteun die saak ten gunste van inflasieteikens as raamwerk vir monetêre beleid.

M. Comm. / Although there has been several work done on monetary policy and inflation in South Africa, this dissertation is intended to add and expand on the existing literature on the subject with data dating back to 1970. The dissertation was inspired by recent international research that has indentified that a large Bayesian VAR model normally performs better than the normal SVAR model. Given that there has already been differing conclusions in literature on whether interest rates are effective as a tool to control inflation, there is therefore an opportunity to assess monetary policy using a different and more robust modelling framework. The choice of a sample is informed by the fact that prior to inflation targeting and within the period under consideration; interest rates remained a core factor in monetary policy management. Some of the literature will be discussed in detail in chapter 2. This dissertation will introduce the large BVAR model with 14 variables in the South African economy. In comparison, the SVAR model suffers from the curse of dimensionality that is eliminated by using more variables with the Large Bayesian VAR with the response functions of all 14 variables. The objective is therefore to determine whether interest rate changes in South Africa have a meaningful and desired effect on inflation. A substantial amount of recent literature was done within the environment of inflation targeting; however, our study intends to measure more the responsiveness of interest rates and other macro variables to monetary policy. The period of inflation targeting in South Africa provides more useful data and evidence on the responsiveness of the macro variables given the direct policy approach it represents versus the previous regime and hence it is covered in more detail in the dissertation. We also assess, in the process, the main drivers behind inflation in South Africa, in an effort to establish whether the country suffers from cost- push or demandpush. The type of inflation should also assist in providing recommendations on the appropriate response to inflation.

This study reviews three of Tobin’s major contributions to economics, namely; Tobin’s q , liquidity preference as a behavior towards risk, and Tobin’s global transaction tax on foreign exchange transactions to identify any potential unifying features. The original suggestion of this thesis, given Tobin’s last contribution, is the role of savings that links all three contributions. The extension of this study aims to review these contributions so as to come up with po ssible links between them and apply the theory of q to a sample of forty five South African firms to a ssess firm diversification and performance measurement when it comes to monopoly profits, as well as the stability of any exchange rate when it comes to the Tobin tax issue, given South Africa’s links to the Pound, Dollar and Euro. Our findings out of the empirical analysis performed hints at investors how to go abo ut in maximizing profit in the South African market based on the diversification s trategies they can adopt. Indeed non-diversified firms have a higher risk involved a nd performed better than diversified ones from 2007 to 2009. Our results bas ed on book values are also of great relevancy to entrepreneurs in assessing the degree of diversification optional to them. The deviation of q from unity is another interesting point to note wh en it comes to ordinary profits for monopoly firms like Eskom. Tobin’s q and risk are indeed connected through discounting and the relationship between risk and a transaction tax imposed on international financial transactions is taxation itself. In order for economic growth to arise into an economy, investment is cruc ial and this is achieved if volatility in financial markets is reduced, and hence the impo rtance of reviewing the Tobin tax. The focus here is to link savings, the Tobin tax an d the issue of international financial market liberalization to determine the impact on gl obal developments and trace these through to the South African situation. We also rev iew Tobin’s q and its important link to the IS/LM framework which differs from the normal textbook a nd Keynesian view. In other words we explore in detail, Tobin’s (1969) general equilibrium approach to monetary policy and look at how financi al policies and events can influence aggregate demand, through an effect on th e valuation of physical assets relative to their replacement cost. As the review h opes to find a common theme, in the three contributions, we present a discussion of eac h original article in some detail. Chapter Two and Three includes Tobin’s q and portfolio decisions respectively. Chapter Four covers the tax on foreign exchange tra nsactions in greater detail, and vii attempts to view this as a solution to the passing current world economic crisis. A final chapter provides a summary of our results and modest macroeconomic proposals for South Africa. / Thesis (M.Comm.)-University of KwaZulu-Natal, Pietermaritzburg, 2009.

The economic crisis of 2007 has had debilitating effects on the global economy, affecting GDP growth, unemployment and trade to name a few. In response to these economic effects, numerous policy interventions were implemented. There are various existing time-series methods available to determine better estimates of GDP growth rates, one of which is Stein’s Paradox which uses observed averages to estimate unobservable quantities which are closer to the true unknown GDP growth rates or theta (θ) in order to determine better growth rates post the economic crisis. The resulting James-Stein estimator (z) is said to be better than the arithmetic average, and thus a closer approximation to the true GDP growth rates which are unobservable. This dissertation analyses the effects of the 2008 financial crisis on the global economy, with specific reference to South Africa and America, and their corresponding policy interventions to determine the growth trajectory after the crisis. The main objective is to determine if better estimates of GDP growth can be calculated using Stein’s Paradox, across a sample of 30 countries, using quarterly GDP growth for the period 2005 to 2008. Annual GDP data was also used for the period 2009-2011, and future GDP growth rates were forecasted for the period 2012 to 2016. To reinforce the Stein’s Paradox, the Monte Carlo study is undertaken. It is used to determine how the James-Stein estimates perform under different conditions using a common c or unique c, and to determine which condition will provide more accurate GDP growth rates (Muthen. 2002). Analysis of time series data across a sample of 30 countries using Stein’s Paradox provided better estimates of GDP growth rates than the individual average growth rates for each country based on the lower standard deviation and total squared error of estimation achieved. This shows that the results are closer to theta and have a smaller amount of error, particularly when a common c was used. The Monte Carlo results indicate that better GDP growth rates are achieved when using a common c instead of a unique c given that a smaller standard deviation and variance is derived. Therefore the Monte Carlo study aims to reinforce or verify Stein’s Paradox. The study also indicates that emerging and developing countries seem to be the driving forces of growth in the future, while developed countries seem to be lagging behind. / Thesis (M.Com.)-University of KwaZulu-Natal, Pietermaritzburg, 2013.

This study examined the impact of financial liberalisation on economic growth in South Africa. The study used quarterly time series data for the period 1980 to 2010. A vector error correction model was used to determine the short run and long run effects of financial liberalisation on economic growth in South Africa. The other explanatory variables considered in this study were government expenditure, investment ratio, public expenditure on education and trade openness. Results from this study revealed that financial liberalisation, government expenditure and public expenditure on education have a positive impact on economic growth while trade openness negatively affects economic growth in South Africa. Policy recommendations were made using these results.

The international linkages of stock markets have important implications for cost of capital and portfolio diversification. Recent trends in globalization, financial liberalization and financial innovation raises questions with regard to whether African stock markets are being integrated into world equity markets. This study examines the extent to which the South African (SA) equity market is integrated into the world equity markets using daily data for the period 1995-2007. The study is divided into three main parts, each looking at the different ways in which integration can be considered. The first investigates whether there is long run comovement between the SA and the major global equity markets. Both bivariate and multivariate Johansen (1988) and Johansen and Juselius (1990) cointegration approaches were utilised. Vector Error Correction Models (VECMs) are then estimated for portfolios which show evidence of cointegration. The second part analyses returns linkages using the Vector Autoregressive (VAR), block exogeneity, impulse response and variance decomposition. The third part examines the behaviour of volatility and volatility linkages among the stock markets. Firstly volatility is analysed using the GARCH, EGARCH and GJR GARCH. Simultaneously, the hypothesis that investors receive a premium for investing in more risky stock markets is explored using the GARCH-in mean. The long term trend of volatility is also examined. Volatility linkages are then analysed using the VAR, block exogeneity, impulse response and variance decomposition. The first part established that no bivariate cointegration exists between the SA and any of the stock markets being studied, implying that pairwise portfolio diversification is potentially worthwhile for SA portfolio managers. However, multivariate cointegration exists for some portfolios, with the US, UK, Germany and SA showing evidence of error correction for some of these portfolios. Findings on return linkages is that there are significant returns linkages among the markets, with the US and SA being the most exogenous and most endogenous respectively. Findings regarding volatility are that the volatility in all the markets is inherently asymmetric and that except for the US there is no risk premium in any of the markets. The long term trend of volatility in all the stock markets was found to be relatively stable. The final finding was that significant volatility linkages exist among the markets, with the US being the most exogenous and SA and China showing evidence of bidirectional linkages. Overall, except for volatility linkages, the integration of SA into the global equity markets is still quite low. Thus, both SA and international investors can capitalise on this portfolio diversification potential. On the other hand, policy makers should capitalise on this and make policies that will attract the much needed foreign investors.

Following many other central banks around the world, the South African Reserve Bank has adopted inflation targeting as its monetary policy framework. The aim of this is to achieve low levels of inflation in order to attain price stability thereby promoting growth. In South Africa, the chosen band to target is 3%–6%. This has been criticised by many trade unions who are calling for the abandonment of inflation targeting. Despite targeting 3%–6%, it is not known whether this is the optimal inflation range for South Africa. Therefore, the aim of this study is to determine the inflation threshold level for South Africa using quarterly data for the period 1983 to 2010. The first section determines whether or not there is a long-run relationship between inflation and growth using the Johansen cointegration method. Exogeneity tests determine the causality between these variables. Vector error correction models are estimated if cointegration is found. The second part determines the threshold level of inflation using the method of conditional least squares. The inflation level that maximises the R-squared value and minimises the residual sum of squares gives an indication of the threshold level. The third part of the study determines whether or not inflation volatility has a significant impact on growth. The first part established that there is long-run comovement between inflation and growth.The causality is bidirectional with both variables being endogenous.Findings regarding the threshold level show that the current inflation targeting band of 3%–6% may be extended up to 9.5%. In addition, the range of inflation from 5.5% to 6.5% promotes economic growth in South Africa. Finally, the evidence suggests that inflation volatility does not have a significant impact on economic growth and the focus of policy should be directed towards the level of inflation as has been the case.

The purpose of this paper is to examine the interest rate transmission mechanism for South Africa as an emerging economy in a pre-repo and repo system. It explains how the money market rate is transmitted to the retail interest rates both in the long-run and short-run and tests the symmetric and asymmetric interest rate pass-through using the Scholnick (1996) ECM and the Wang and Lee (2009) ECM-EGARCH (1, 1)-M methodology. This permitted the examination of the impact of interest rate volatility, along with the leverage effect. An incomplete pass-through is found in the short-run. From the entire sample period, a symmetric adjustment is found in the deposit rate, which had upward rigidity adjustment, while an asymmetric adjustment is found in the lending rate, with a downward rigidity adjustment. All the adjustments supported the collusive pricing arrangements. According to the conditional variance estimation of the ECM-EGARCH (1, 1), negative volatility impact and leverage effect are present and influential only in the deposit interest rate adjustment process in South Africa.

This study estimates the interdependence between South Africa‟s monetary policy and stock market performance, utilising structural vector autoregression (SVAR) methodology. The study finds that a stock price shock which decrease stock prices by 100 basis points leads to 5 basis points decrease in interbank rate. A monetary policy shock that increases the interbank rate by l percent leads to decrease in real stock prices by 1 percent. This result for South Africa is similar to the result by Bjornland and Leteimo (2009) which earlier concluded that there was a high interdependence between interest rate setting and stock prices. However the magnitude of the relationship is relatively lower for South Africa compared to that of the United States of America (USA). The result of the current study is also very much consistent with the argument that the South African stock market is resource-based and so is influenced by external shocks, meaning monetary policy shock does not have as much impact on stock market in South Africa as in the USA. However the SARB may have to consider watching movements in stock prices so that booms in stock markets do not defeat central bank monetary policy thrusts. The stock price market is an essential source of information for monetary policy in South Africa.