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Non-parametric regression modelling of in situ fCO2 in the Southern Ocean
(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: The Southern Ocean is a complex system, where the relationship between CO2
concentrations and its drivers varies intra- and inter-annually. Due to the lack
of readily available in situ data in the ...
Comparison of methods to calculate measures of inequality based on interval data
(Stellenbosch : Stellenbosch University, 2015-12)
ENGLISH ABSTRACT: In recent decades, economists and sociologists have taken an increasing interest in the study of
income attainment and income inequality. Many of these studies have used census data, but
social surveys ...
The effect of liquidity on stock returns on the JSE
(Stellenbosch : Stellenbosch University, 2012-12)
ENGLISH ABSTRACT: This thesis examines the effect of liquidity on excess stock returns on the Johannesburg Stock Exchange (JSE) over the period 2003 to 2011. It builds on the findings of previous studies that found size, ...
Optimal asset allocation for South African pension funds under the revised Regulation 28
(Stellenbosch : Stellenbosch University, 2012-03)
ENGLISH ABSTRACT: On 1 July 2011 the revised version of Regulation 28, which governs the South African
pension fund industry with regard to investments, took effect. The new version allows for
pension funds to invest ...
Advances in random forests with application to classification
(Stellenbosch : Stellenbosch University, 2016-12)
ENGLISH SUMMARY : Since their introduction, random forests have successfully been employed in a vast array of application areas. Fairly recently, a number of algorithms that adhere to Leo Breiman’s definition of a random ...
The saddle-point method and its application to the hill estimator
(Stellenbosch : Stellenbosch University, 2016-12)
ENGLISH SUMMARY : The saddle-point approximation is a highly accurate approximation of the distribution of a random variable. It was originally derived as an approximation in situations where a parameter takes on large ...
An application of geometric data analysis techniques to South African crime data
(Stellenbosch : Stellenbosch University, 2016-12)
ENGLISH SUMMARY : Due to the high levels of violent crime in South Africa, improved methods of analysis are required in order to better scrutinize these statistics. This study diverges from traditional multivariate data ...
Compounding a class of Rayleigh distributions : an objective Bayesian approach
(Stellenbosch : Stellenbosch University, 2015-12)
ENGLISH ABSTRACT: In this work, Bayesian estimation in the context of parametric survival analysis is con-
sidered. A class of models derived by compounding and generalising the Rayleigh dis-
tribution is regarded. These ...
Empirical Bayes estimation of the extreme value index in an ANOVA setting
(Stellenbosch : Stellenbosch University, 2014-04)
ENGLISH ABSTRACT: Extreme value theory (EVT) involves the development of statistical models and techniques in order to describe and model extreme events. In order to make inferences about extreme quantiles, it is necessary ...
An individual-based model of tsetse fly populations dynamics : modelling an extensive mark-release-recapture experiment
(Stellenbosch : Stellenbosch University, 2015-04)
ENGLISH ABSTRACT: Tsetse flies (Glossina spp), native to mid-continental Africa, are the vectors
of trypanosomes that causes human (sleeping sickness) and animal (nagana)
trypanosomiasis. Vector control plays a major ...