SECTORAL ELASTICITY OF SUBSTITUTION AND RETURNS TO SCALE IN SOUTH AFRICA

Elasticity of substitution and returns to scale are estimated on a sectoral basis for South Africa using panel-based generalised least square procedure. Apart from sectoral differences in terms of elasticity of substitution, the study found that elasticity of substitution is below unity in all of the sectors. Most of the sectors studied are found to have increasing returns to scale in production. The study further explores the implications of elasticity of factor substitution and returns to scale on growth and employment creation. It is argued that a greater number of jobs can be created from growth of sectors with constant or decreasing returns to scale than from the same level of output growth generated by sectors with increasing returns to scale. This is the case when the employment-creating potential of the same amount of additional output is compared in all the sectors examined. By virtue of scale economies, a sector like finance, insurance, real estate and business services generates more output with less proportional increase in inputs, which means growth in this sector may not have the desired impact on job creation. However, given the sector's large share (20%) of the country's total output and employment, it may generate more jobs, even if sectors like utilities and construction experience the same level of output growth. Given its importance for growth and employment, the study recommends further investigation into the reasons why elasticity of substitution is lower in sectors like utilities, mining and trade, catering and accommodation services.     

DOES MOTHER'S EDUCATION MATTER IN CHILD'S HEALTH? EVIDENCE FROM SOUTH AFRICA1

Using the 1993 South Africa Integrated Household Survey, this paper studies the effect that mother's education through the knowledge channel has on children's health using height for age Z‐scores as health measure. Under a two‐stage least square methodology we find that an increase in 4 years on mother's education (approximately 1 standard deviation) will lead to an increase of 0.6 standard deviations on her child's height for age Z‐score. We also find, as the medical literature suggests, support for the hypothesis that mother's education is more important for children older than 24 months of age.     

RESIDENTIAL PROPERTY PRICES IN A SUBMARKET OF SOUTH AFRICA: SEPARATING REAL RETURNS FROM ATTRIBUTE GROWTH

The South African residential housing market experienced high growth in the previous decade, in line with international trends. Traditional methods of documenting this trajectory use the average prices of only properties that are sold in given periods and regions. A critical assumption of these approaches is that houses remain homogenous across time and space. This paper constructs a micro‐level hedonic price index to account for changing attributes of heterogenous houses. It illustrates that returns may have been overstated, and that much of the growth recorded in this market is driven by attribute inflation, particularly in the high price segment.     

THE REVENUE-EXPENDITURE NEXUS: HISTORICAL EVIDENCE FOR SOUTH AFRICA

Results from unit root and cointegration tests suggest that, allowing for structural breaks, government revenue and expenditure in South Africa during 1895‐2005 were I(1) series and cointegrated. Results from Granger‐type causality tests suggest that a bidirectional Granger‐causal relation existed between revenue and expenditure for the full sample period and for sub‐periods up to the 1960s, consistent with the so‐called “fiscal synchronisation hypothesis”. However, in the 1960s the causal relation appears to have shifted to run from expenditure to taxation, consistent with Peacock and Wiseman's “displacement effect”. In the context of the recent fiscal consolidation literature, the South African fiscal experience would appear to be generally consistent with either revenue‐ or expenditure‐led fiscal consolidation efforts, but with the more recent evidence favoring expenditure‐led consolidations.     

AN ANALYSIS OF INVENTORY INVESTMENT IN SOUTH AFRICA

This paper describes the evolution of inventory investment in South Africa over the past two decades, and identifies the factors influencing inventory investment over this period. An econometric model of inventory investment in South Africa, based on the production smoothing approach, is constructed. The results of the model indicate that actual sales, production, unfilled orders, price levels, interest rates and expected sales have an influence on the evolution of inventory investment. These variables are directly or indirectly influenced by macroeconomic policy decisions and through their influence on inventory investment they also influence changes in gross domestic product. Therefore, prior information on the factors that influence inventory investment contributes to explaining changes in gross domestic product and may help to prepare more accurate short‐term forecasts of overall economic activity.     

THE PREDICTABILITY OF STOCK MARKET RETURNS IN SOUTH AFRICA: PARAMETRIC VS. NON‐PARAMETRIC METHODS

This paper compares the forecasting performance of a sub‐class of univariate parametric and non‐parametric models in predicting stock market returns in South Africa. To account for conditional heteroskedasticity in stock returns data, the non‐parametric model is generated by the conditional heteroskedastic non‐linear autoregressive (NAR) model, while the parametric model is produced by the generalised autoregressive conditional heteroskedastic in mean (GARCH‐M) model. The results of the paper show that the NAR as a non‐parametric model performs better than the GARCH‐M model in short‐term forecasting horizon, and this indicates the importance of a distribution‐free model in predicting stock returns in South Africa.     

IS THERE EVIDENCE OF A WAGE PENALTY TO FEMALE PART‐TIME EMPLOYMENT IN SOUTH AFRICA?

In this paper, we investigate female part‐time employment in South Africa. Using household survey data for South Africa from 1995 to 2004, we show that women are over‐represented in part‐time employment, and that the growth in part‐time work has been an important feature of the feminisation of the labour force. In contrast to many studies of part‐time work in other countries, however, we find evidence of a significant wage premium to female part‐time employment. The premium is also robust to fixed effects estimations using Labour Force Survey panel data from 2001 to 2004, where controlling for unobservable differences increases its size. The premium persists with different hourly thresholds defining part‐time employment and when we account for possible reporting errors in hours worked.     

THE ECONOMICS OF SUICIDE IN SOUTH AFRICA

This study investigates the economics of suicide in South Africa using the Mortality and Causes of Death data from death notification as well as regional economic data for the 2006‐2008 period. Using an inflation rate that varies by month and across province of residence as a proxy for economic performance, the results indicate a negative relationship between inflation and suicide, suggesting that suicides are countercyclical. When controlling for month and province fixed effects, however, the inflation coefficient, albeit remaining negative, is no longer significant, except in the female sample. Suicide is more prevalent among younger individuals, while the greatest proportion of suicide is seen among men. Suicides also exhibit a strong seasonal variation, with peaks in spring and summer, with December having the highest suicide prevalence. The overall results indicate a negative but insignificant relationship between economic performance and suicide in South Africa, with socio‐economic differences and individual characteristics accounting for most of the variation in suicide.     

THE CHANGING FACE OF PUBLIC FINANCING OF HIGHER EDUCATION,WITH SPECIAL REFERENCE TO SOUTH AFRICA1

Higher education displays characteristics of both private and public goods and there is a trend worldwide to expect individuals to pay more of the costs of their higher education. In South Africa public funding of higher education decreased from 0.86% of GDP in 1986 to only 0.66% in 2006; so that student tuition fees had to be increased to compensate for this loss of income. In the process staff numbers were kept relatively constant while student numbers increased appreciably. Two future scenarios, based on public higher education expenditure as a percentage of GDP and on real state allocation per WFTES, are spelt out. Although the qualifications awarded per FTE academic staff member increased over time, the graduation rates of the higher education institutions in South Africa are worsening. High‐level research, measured in publication units per FTE academic staff member, shows a disturbing decreasing trend since 1997.     

DURATION ANALYSIS IN SOUTH AFRICA: THE SEARCH FOR SUPERIOR MEASURES

The Macaulay duration is a highly successful tool for measuring and managing interest rate risk. However, it employs restrictive assumptions which constrain its usefulness in a rapidly evolving market. The Basel II implementation and ongoing accounting standard reassessments highlight the requirement for accurate, robust risk measures. Contemporary research has focused on augmenting the existing duration definition. We extend this work by relaxing some input assumptions, describing a different duration measure and applying it to interest rate driven price changes and examining the influence on the duration gap. The economic market value of equity (an important metric for regulators and risk management) is significantly improved.     

MODELLING INFLATION IN SOUTH AFRICA: A MULTIVARIATE COINTEGRATION ANALYSIS

We employ an expectations augmented Phillips curve framework to investigate the link between inflation, unit labour costs, the output gap, the real exchange rate and inflation expectations. Using multivariate cointegration techniques, we find evidence consistent with mark‐up behaviour of output prices over unit labour costs. Most importantly, we find that the mark‐up in the South African economy is much higher than in the U.S. For South Africa we find a markup of about 30 per cent: three times as high as the 10 per cent markup found for the U.S.     

AN ANALYSIS OF ECONOMIC INFRASTRUCTURE INVESTMENT IN SOUTH AFRICA

This paper analyses long‐term trends in the development of South Africa's economic infrastructure and discusses their relationship with the country's long‐term economic growth. A database covering national accounts data, railways, roads, ports, air travel, phone lines and electricity was established for this purpose, and may facilitate further quantitative research. PSS (Pesaran, Shin and Smith, 1996, 2001) F‐tests are used to identify directions of association between economic infrastructure and economic growth. These indicate long‐run forcing relationships from public‐sector economic infrastructure investment and fixed capital stock to gross domestic product (GDP), from roads to GDP, and from GDP to a range of other types of infrastructure. There is also evidence of potential simultaneity between specific types of infrastructure and GDP. The evidence suggests three main findings. Firstly, the relationship between economic infrastructure and economic growth appears to run in both directions. Inadequate investment in infrastructure could create bottlenecks, and opportunities for promoting economic growth could be missed. Secondly, South Africa's stock of economic infrastructure has developed in phases. Policymakers should focus on choosing or encouraging the right type of infrastructure at the right time. Thirdly, the need for investment in economic infrastructure never goes away. The maintenance and expansion of infrastructure are important dimensions of supporting economic activity in a growing economy, provided that individual projects are chosen on the basis of appropriate cost‐benefit analyses.     

A NOTE ON THE SUPPLY OF ECONOMISTS IN SOUTH AFRICA

If true delight you would afford him You'd give him Adam Smith to read. A deep economist, indeed, He talked about the wealth of nations; The state relied, his friends were told, Upon its staples, not on gold—This subject filled his conversations. His father listened, frowned, and groaned, And mortgaged all the land he owned.