The effects of education on economic growth and global competitiveness: a statistical approach

This thesis investigates whether there is a relationship between education, economic growth and global competitiveness and whether there is a relationship between South Africa’s current throughput rates in institutions of higher education, and its economic growth and global competitiveness. Economic growth is defined as a country’s ability to improve the life of its average citizen based on the strength of its economy. As such, it is increasingly important for a country to assess the factors that contribute to the improvement of their economy, which will ultimately result in its economic growth. Global competitiveness is an indication of how countries are able to provide for their people internally, as well as participate in the international market. To this end, economic growth and global competitiveness are two proxies that can be used to demonstrate the economic wellbeing of a country. Considering that prosperity under economic growth and global competitiveness of a country are driven by its people, one of the aims of this thesis was to investigate whether there is a relationship between education and economic growth and global competitiveness. Considering the recent demand in free education in South Africa, it is also important to understand whether there is a relationship between South Africa’s current throughput rates at higher education institutions and its economic growth and global competitiveness. Bearing in mind the political past which has led to inequality in the country, it is important to understand which types of education contribute to the economy and which types need to be further supported in order to increase the country’s economic productivity. Therefore, an additional aim of the thesis was to determine the relationship between South Africa’s current throughput rates in institutions of higher education, and its economic growth and global competitiveness. To address the aforementioned aims, data were collected from various open access online repositories. All the data were collated and numerous general linear models were constructed and tested to determine the different relationships as per the two aims. The results reveal that secondary school education had the highest impact on economic growth and global competitiveness on a global scale. This could be attributed to the fact that secondary school graduates tend to make up the largest part of the general workforce and as such, would make up a substantial proportion of the economy. Regarding South Africa, the only significant relationships were between green cluster universities (universities that focus on both research and technical training) and global competitiveness. Overall average throughput rates in all academic institutions were low; this could indicate that perhaps there are issues within the higher education system itself that need to be addressed in order to increase the throughput rate. From a managerial perspective, the results of this research stress the importance for the government to further investigate this area of study, as the call for free education becomes more prominent. The low throughput rates seem to suggest that the government is spending substantial amounts of money on students who do not always complete their studies. More research needs to be done to assess the root of the problem in South Africa’s tertiary education system, in order to ensure that this aspect increases its positive contribution towards the country’s economic growth and global competitiveness

The evaluation of potential dietary media, measurement parameters and storage techniques for use in forensic entomotoxicology

The term forensic entomotoxicology was coined by Pounder and is used to describe the process of using insects to determine the presence or absence of toxicants in decomposing corpses. Forensic entomotoxicology is most applicable when the orthodox sources of evidence (i.e. blood and urine) are no longer available for testing due to the degree of putrefaction as a result of the decomposition process. As the field is relatively new, various authors have conducted studies to determine the effects of different toxicants on different insects. These studies have all been conducted in the absence of a standardised protocol and we hypothesise that this has led to conflicting results (i.e. two different authors will conduct a study using the same toxicant and model insect and the effects on the insects will differ significantly). The aim of this thesis was to identify the areas which might have led to the artefacts in the results and identify ways in which to standardise them. The three areas selected were the feeding substrates and the measures taken to quantify growth rate, as well as the preservation techniques that should be used for preserving larval flies. The recommendation from the literature review was that artificial diets would be the most appropriate dietary media to use for entomotoxicological studies. An artificial diet was selected and modified for potential used in entomotoxicological studies. Four different diets (no meat treatment, fish, beef and pork artificial diets) were used to rear Chrysomya chloropyga larvae and their growth rates were measured using length and width. The fly larvae reared on the fish and no meat treatment diets did not reach pupation stage. The beef and pork diets produced the largest larvae and the flies in these treatments reached adult stage. The recommendation was that the beef and pork treatments be tested with various toxicants to establish their stability in the matrix and the diet that provides the toxicants with the most stability should be used for future entomotoxicological studies. The two other factors selected for standardisation were the parameters used to quantify growth rate, as well as the preservation techniques used to store empty Chrysomya chloropyga pupal casings and Calliphora croceipalpis third instar larvae. Previous authors have suggested that width be used as an alternative to length to quantify growth rate. The results from this thesis show that length should continue to be used as the standard parameter because the incremental change in length is much larger than the change in width, and these larger increments allow for greater resolution when estimating the age of the larvae. Various authors have also suggested that pupal casings should be stored without any preservative, whereas fly larvae should be stored in concentrations of ethanol >70%. The results in this thesis have shown that the concentration of ethanol does not make any significant difference to the proportional change of length and width of the empty pupal casings and the third instar larvae. The recommendation is that when selecting the preservation technique, the integrity of the specimen for examination of other evidence (i.e. DNA or toxicological extraction) should take precedence. Although this thesis has not completely standardised the protocol for forensic entomotoxicology, it has indicated the areas that need to be focused on in order for standardisation to occur. Future studies should focus on standardisation, as this makes studies more comparable and ultimately makes entomotoxicological evidence admissible in the court of law