Thesis (M.Com. (Economics & Economic History)) - Rhodes University, 2006. / A thesis submitted in partial fulfilment of the requirements of the degree of Masters of Commerce in Financial Markets.

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This dissertation investigates the effects of exchange rate devaluation on non-mining exports in Botswana over the period 1984-2012 and the exchange rate pass-through effect to consumer prices. The economy of Botswana is significantly dependent on mineral exports, particularly the diamond. The dominance and over-reliance on diamond exports in the economy has led to low levels of economic diversification. Bank of Botswana has over the years devalued the pula, in attempt to stimulate growth of non-mining export industries and to enhance non-mining export competitiveness. However, raising export competitiveness this way may be inflationary and have no significant effect on non-mining exports. The study investigates the existence of cointegration between real effective exchange rate and the non-mining exports using the Johansen method of cointegration. The vector error correction model is used, to examine the short-run dynamics of the model. The results suggest that a positive long-run relationship exists between real effective exchange rate and Botswana’s non-mining exports. The results of the exchange rate pass-through suggest that nominal exchange rate has a short term relationship with consumer prices in Botswana. However this relationship does not hold over the long run.

The effectiveness of monetary policy in achieving its macroeconomic objectives such as price stability and economic growth depend on the monetary policy tools that are implemented by the Central Bank. Monetary aggregates are one of the tools that have been used as indicators of economic activity and as intermediate targets to achieve these economic objectives. Until recently, monetary aggregates have been questioned and criticised on their usefulness in monetary policy. This has been attributed to the economic, financial and technological developments that have distorted the relationship between monetary aggregates and major macroeconomic variables. This study investigates the relevance of monetary aggregation by comparing the traditional simple sum and Divisia index monetary aggregates which was constructed for the first time for South Africa using the Tornquist-Theil method. The Polynomial Distributed Lag model is employed to compare the performance of these monetary aggregates using their relationship with inflation and manufacturing index. Furthermore, the aggregates are compared in terms of their controllability and information content. Overall, the study found a very strong relationship between inflation and all the monetary aggregates. However, more specifically the results suggested that the Divisia indices are superior to the simple sum in terms of predicting inflation. The evidence further suggests that the Divisia aggregates provide higher information about inflation than the simple sum aggregates. Regarding the controllability of the monetary aggregates, the findings suggest that the monetary authorities can hardly control the monetary aggregates using monetary base. Finally, the relationship between manufacturing index and all the monetary aggregates was very weak.

Orientador: Rosangela Ballini / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Economia / Made available in DSpace on 2018-08-19T16:56:59Z (GMT). No. of bitstreams: 1 Aggio_GustavodeOliveira_D.pdf: 2849218 bytes, checksum: 6c073c3959c91ca84f78c51c5873c6aa (MD5) Previous issue date: 2011 / Resumo: Nesta tese buscamos compreender aspectos das dinâmicas dos fenômenos da aceitabilidade da moeda, da estrutura de taxas de juros e do processo inflacionário utilizando a abordagem dos sistemas dinâmicos complexos. Nossa justificativa é que o comportamento dos agentes econômicos ocorre de forma descentralizada e, ao menos em parte, delimitado por uma estrutura funcional que, por sua vez, também é sujeita a variação ao longo do tempo. Portanto, nossa abordagem deve considerar um fenômeno em processo e sujeito a não-linearidades. A tese está dividida em cinco capítulos. No primeiro nós expomos conceitos gerais sobre sistemas dinâmicos complexos, auto-organização, modelos baseados em agentes e lógica fuzzy e conjuntos probabilísticos. Explicitamos, assim, as características que atribuímos aos fenômenos estudados e o método empregado para análise. No segundo capítulo nós oferecemos uma teoria em processo para a emergência da aceitabilidade generalizada de uma moeda, assim como dois modelos para a demonstração das possibilidades deste processo. No terceiro capítulo nós observamos estudos sobre a dinâmica da estrutura das taxas de juros e sugerimos uma explicação para a diferença empiricamente observada entre a dinâmica das taxas de juros de curto e longo prazo. No quarto capítulo nós realizamos um estudo sobre a volatilidade e a persistência na série de variações percentuais do Índice de Preços ao Consumidor dos Estados Unidos. No capítulo final nós comparamos a abordagem do processo inflacionário da chamada nova síntese neoclássica com um modelo de dinâmica de preços fora do equilíbrio / Abstract: In this thesis we aim to understand aspects of the dynamics of the phenomena of the acceptability of the money, of the structure of interest rates and of the inflationary process using the approach of complex dynamic systems. Our explanation is that the behavior of the economic occurs in a decentralized manner, and at least partially delimited by a functional structure which, in turn, is also subject to variation over time. Therefore, our approach should consider a phenomenon in the process and subject to the nonlinearities. The thesis is divided into five chapters. At first chapter we expose the general concepts about complex dynamic systems, self-organization, agent-based models and fuzzy logic and probabilistic sets. Made explicit, so the characteristics we attribute to the phenomena studied and the analysis method. In the second chapter we offer a theory in process for the emergence of generalized acceptance of money, as well as two models for demonstrating the possibilities of this process. In the third chapter we observe dynamics studies of the structure of interest rates and suggest an explanation for the empirically observed differences between the dynamics of interest rates for short and long term. In the fourth chapter we perform a study on the volatility and persistence in the series of percentage changes in the Consumer Price Index of the United States. In the final chapter we compare the approach of the inflationary process of the so-called new neoclassical synthesis with a model of price dynamics out of balance / Doutorado / Teoria Economica / Doutor em Ciências Econômicas

Less than two decades ago, Zimbabwe was a symbol for the rest of the world of what Africa could become (Dell, 2005). DiSilvio (2007) contends that independent Zimbabwe was an economic success on route to attaining status of the most “developed country” in Africa. Contrary to expectations, by 2003 the Zimbabwean economy was shrinking faster than any other economy in the world at 18 percent per year (Richardson, 2005). Reports indicate that the Zimbabwean economy is in crisis and has since been set back by more than 50 years (Matikinye, 2005). This phenomenon necessitated the need for an investigation to ascertain its cause in Zimbabwe. As a result, the research identifies and presents hyperinflation as the root cause of the crisis in Zimbabwe and illustrates the validity of this assertion with a focus on the Zimbabwean construction industry. As part of the research inquiry, a review of related literature was conducted. The literature review illustrated the generic effects of hyperinflation as well as the effects of this phenomenon in action in Zimbabwe. The literature study was followed by a questionnaire survey. The questionnaire was completed by 23 contractors and 7 clients from a census of contractors and clients in Zimbabwe. The questionnaire consisted of a number of variables, which the respondents were asked to rate vis-à-vis the effects of hyperinflation in the construction industry. In summary, the questionnaire sought to determine the causes of hyperinflation in Zimbabwe, its specific effects on the construction industry and how respondents thought the phenomenon could be mitigated so as to revive the Zimbabwean construction industry. The techniques of re-scaling, in conjunction with descriptive and inferential statistics, ranking and quadrant analysis were applied to the data. Results from these analyses revealed a high degree of agreement among respondents vis-à-vis the effects of hyperinflation on the Zimbabwean construction industry. The interpretation of the results further revealed that hyperinflation has undoubtedly led to the collapse of the Zimbabwean construction industry. In conclusion, the research, applying the interpretations of v the survey findings, prescribes a number of ways in which the Zimbabwean construction sector may be resurrected. Among the recommended prescriptions, there are a number of debatable issues that arise that the researcher proposes should be subject to future study.

M.Com. (Business Management) / Please refer to full text to view abstract

This thesis analyses the influence of monetary policy on the general price level in Zimbabwe during periods of hyperinflation and dollarisation. The first part of the analysis covers the period January 2006 to July 2008 when the country experienced high inflation and ultimately hyperinflation. The second part covers the period 2009 to 2012, when the country adopted the multi-currency system and became fully dollarised. In terms of motivation, the study firstly sought to empirically examine the factors that led to hyperinflation in Zimbabwe, paying particular attention to the influence of monetary policy. Secondly, the thesis sought to determine the major factors that influenced price formation in a dollarised Zimbabwean economy; a completely new macro-economic environment. A significant development in this new macro-economic environment was the loss of monetary policy autonomy of the central bank, which also contributed to the relevance of the study. This thesis makes two contributions. The first contribution is the finding that hyperinflation in Zimbabwe was caused by expansionary monetary policy as a result of the activities of an unrestrained and unaccountable central bank. The second contribution was the empirical finding that in the fully dollarised economy inflation is largely determined by external factors. This implies that the domestic economy has no control over domestic inflation developments and as such, Zimbabwean authorities should formulate appropriate economic policies to respond to the impact of external shocks on domestic price formation when the need arises. The role of monetary policy in Zimbabwe’s hyperinflation episode is assessed using the Autoregressive Distributed Lag (ARDL) and the Error Correction Model (ECM) approaches with monthly data from January 2006 to July 2008. The impact of monetary policy on hyperinflation is captured by the coefficient of broad money supply and the interest rate. Results indicate that hyperinflation was caused by expansionary monetary policy, the exchange rate premium and inflation expectations for both the short and long term. Zimbabwe’s hyperinflation episode which peaked during the period 2007 to 2008 brings to the fore the importance of ensuring that the central bank is independent in executing its mandate of influencing the monetary policy process in a manner that ensures price stability. The ARDL and ECM approaches are also used to explore the dynamics of inflation in the dollarised Zimbabwean economy, with monthly data from January 2009 to December 2012. The main drivers of inflation under the multi-currency system were found to be the United States of America dollar/South African rand exchange rate, international oil prices, inflation expectations and the South African inflation rate. The findings contrast with the hyperinflationary era, where empirical studies have cited excessive money supply growth as the major driver of inflation dynamics in Zimbabwe. The results also suggest a higher exchange rate pass-through to domestic prices, consistent with empirical literature which postulates that inflation in dollarised economies is largely explained by movements in the exchange rate of major trading partners and international prices. The policy implication from the analysis is the need for policy makers to aggressively promote policies that ensure increased productivity of the economy. An improvement in productivity would influence the relative prices of tradable and non-tradable goods and ultimately the general price level in the economy. The study also quantified the independence of the Reserve Bank of Zimbabwe (RBZ) using the Mathew (2006), “new index for institutional quality” and the results showed that the RBZ is not an independent central bank. The central bank is found to have a low index of central bank independence (CBI), against a high level of inflation. While this relationship does not imply causality it can be inferred that the lack of independence of the RBZ could have influenced inflation dynamics in Zimbabwe. Only a subordinated central bank can be compelled to engage in inflationary deficit financing and also fund quasi-fiscal activities. The provisions of the RBZ Act [Chapter 22:15] in their current form make the central bank an appendage of the Ministry of Finance and Economic Development and this has, to a large extent, resulted in conflict between the political goals of government and the central bank’s primary objective of achieving price stability. In the event that Zimbabwe reintroduces its own currency in future, the achievement of the primary goal of price stability by the central bank will only be realised if the apex bank is given more autonomy.

The study examines exchange rate volatility and inflation in South Africa over the period of 1987- 2012 using annual data. With the use of VAR, ADF unit root testing and Johansen for cointegration the study examines the relationship between exchange rate volatility and inflation in South Africa. The study also examines other variables, which are Money Supply, Trade Openness, Real Interest Rate and Real Gross Domestic Product (RGDP), if they had an impact on inflation and had contributed significantly to inflation during the period under review. All macroeconomic variables were identified to have an impact on inflation in the long-run. Exchange rate volatility was identified as the main variable that had substantial impact on inflation rate. The study recommended the current system used by the authorities was working well, as they can pursue a countercyclical macro policy, but also continue to manage the float by intervening to stabilize the exchange rate. The reason for this recommendation was that because one of the advantages of floating exchange rate is freeing internal policy, with a floating exchange rate, balance of payments disequilibrium would be rectified by a change in the external price of the currency. However, with a fixed rate, curing a deficit could involve a general deflationary policy resulting in unpleasant consequences for the whole economy such as unemployment.

Inflation and unemployment are perhaps the two most important challenges that face the South African economy of today. Firstly, the study examines the relationship between monetary policy and the two economic fundamentals (inflation and unemployment), using the VEC modeling technique. The model regresses the monetary policy variable against inflation and unemployment growth over the period 1980-2008. The results suggest that (1) there is a long run relationship between inflation and unemployment (2) monetary policy reacts more to variations in inflation compared to variations in unemployment. Secondly, the relationship between inflation and unemployment as explained by the Phillips curve is investigated. The results show that there is a positive relationship between inflation and unemployment.