For over a century, several minority caste groups have suffered discrimination in eastern Nigeria. They include former slaves and servant groups known as osu or ohu as well as other names and are generally referred to as caste groups. Forbidden to associate freely with the freeborn, these groups still maintain their stigma. The origins of the caste groups lie in the past. However, after 1900, they started to struggle for emancipation. Since then, discrimination against them has been abolished many times. Yet the practice remains persistent. At the same time, the discrimination against the caste groups continues to exercise the public and private imagination and it is depicted and discussed in various ways in the media, from newspapers to films and even in internet forums. Using oral sources and commentaries in the media, this thesis argues that Igbo socio-political life has continued to sustain this practice even as it pretends to reject it. The general attitude to discrimination against the caste groups has been that it is barbaric. Yet, the freeborn still find it difficult to embrace them. Reasons for this include a range of fears, but most importantly fear of social ostracism. The thesis argues that the media has engaged in the struggle to change the situation by providing a platform for debate about the practice. However, this has had little impact because of the nature of Igbo socio-political life.

Travel writing criticism has sometimes suggested that little travel writing has been produced by Africans. This thesis shows that this is not the case, through a literary study of writing about travel published in Yoruba-speaking southwestern Nigeria between 1914 and 2014. This is a study of writing about domestic travel – Nigerians travelling within Nigeria – and of both Yoruba- and English-language texts. It is both a study of conventional ‘travel writing’ such as first-person travelogues, and of the motif of travel in writing more broadly: it encompasses serialised newspaper columns, historical writing, novels, autobiography, book-length travelogues and online writing. As well as close readings, this study draws on archival research and an in-depth interview with travel writer Pelu Awofeso. This is not an exhaustive study but rather a series of case studies, placed in their historical context. I examine southwestern Nigerian writers’ re resentations of laces within Nigeria and changing communal identities: local, translocal, regional and national. I explore their ideas about the benefits of travel and travel writing, knowledge and cosmopolitanism. I argue that we can read these texts as products of a local print culture, addressed to local readers, as well as in relation to the broader travel writing tradition.

Considerable historical attention has been paid to the end of Empire in Britain’s East African colonies and the consequences of this for postcolonial states. The forced migration of minority South Asian populations from the new nation-states of East Africa has received considerably less attention. South Asians remain at the margins of African and British national histories, constructed variously as either fringe opponents of anti-colonial nationalist movements or marginalised minorities. Yet re-assessing the history of these ‘refugee’ communities has the potential to enhance scholarly understanding of both colonial and postcolonial power relations and migrant-refugee identity formulation and re-formulation. Moreover, studies of migrant communities in Britain have tended to treat South Asians as a homogenous group, paying relatively little attention to the specific identity trajectories of those who were expelled from the new nation-states of East Africa. In contrast, this research takes as its starting point the transnational experiences of East African Asians as multiple migrants, exploring the reformulation of political and cultural identities during the course of their expulsion, migration and resettlement in and between postcolonial states.

The main motivation of this thesis is to contribute to the literature on the macroeconomic effects of foreign aid flows. It consists of four empirical papers, investigating the two main channels through which aid flows impact the recipient economy: (i) the fiscal sector, and (ii) the real exchange rate. The first paper is concerned with the impact of aid on government expenditure, domestic revenues and borrowing. It uses a traditional fiscal response framework with annual data for Ethiopia. The second paper also focuses on the fiscal sector but uses a recently compiled quarterly fiscal dataset and the cointegrated vector autoregression methodology. The main result arising from both papers is the strong correlation between aid inflows and domestic borrowing, possibly as a strategy to smooth unpredictable and volatile aid inflows. Aid is positively correlated with government expenditures, but there is little evidence of tax displacement. There is also evidence of aid heterogeneity, as grants and loans induce different effects. The third paper assesses the impact of foreign aid on the Ethiopian real exchange rate, which is a common measure of external competitiveness. It uses a quarterly macroeconomic dataset and applies two distinct methodologies: (i) single-equation cointegration models, and (ii) an unobserved components model. The results do not provide support for the ‘Dutch disease' hypothesis. The fourth paper investigates the extent to which foreign aid is ‘absorbed' and ‘spent'. The empirical analysis uses a panel of 25 African low-income countries and applies recently developed panel cointegration techniques. The findings suggest that aid is fully spent while absorption is higher than previously estimated.

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This thesis consists of three stand-alone papers. It examines the economic and political effects of natural resources in Africa. In the first paper, we investigate the effect of mining activity on subnational economic development by using satellite data on night lights as a measure of economic development. We find that mineral production and discovery improves local economy. However, we do not observe (strong) general equilibrium effect beyond the confines of a district. In the second paper, we test the link between natural resources and multiethnic power sharing coalitions in Africa. We find that resource discoveries and rising commodity prices increase the probability of representation at the executive branches of government. Our finding supports the idea that resource discoveries and rising commodity prices provide rulers with more revenues to expand the state cabinet sizes; hence they build broader multi-ethnic coalitions. In the third paper, we investigate the association between natural resources and intra-state local armed conflict in Africa. We find that natural resource discoveries do not trigger armed conflict in Africa at the local level. Consistent with the finding in the first paper (positive economic effect) and second paper (positive political effect), resource discovery appears to reduce the likelihood of armed conflict by increasing the opportunity cost of joining armed rebellion.

This thesis explores the role of South African business as non-state actors (NSAs) in South Africa’s post-apartheid economic diplomacy. The work is an empirical contribution to the debate within diplomacy studies asserting the importance of NSAs in diplomacy studies and that the inclusion of economic considerations in diplomacy studies is crucial. Whilst a broader agenda in diplomacy studies is increasingly being recognised by diplomacy scholars, there is limited case-based evidence of the increasingly active role being played by NSAs in diplomacy generally and economic diplomacy more specifically. The research uses a multistakeholder diplomacy framework to analyse the extent to and ways in which corporate actors engage in South Africa’s post-apartheid economic diplomacy. This study explores specific business activities around economic diplomacy, expounds why South African business adopts different strategies at different times and crucially examines how corporate actors do this. The thesis identifies three distinct modes of corporate diplomacy: consultative, supplementary, and entrepreneurial. The thesis concludes that corporate diplomacy warrants far more scholarly attention than has hitherto been the case, both in developed and emerging economies, on the basis that corporate actors in South Africa play a crucial role in economic diplomacy, both as consumers and producers of diplomatic outcomes.

Nontyphoidal Salmonella (NTS) are a major cause of fatal bacteremia in Africa. We investigated the role of bactericidal antibody in complement-mediated killing of NTS. Immunised mice serum lacked such activity due to weak complement activity. Mouse anti-Salmonella antibodies were able to effect killing when given a source of human complement. Human serum bactericidal assays showed that the serum-susceptibility of an African clinical isolate varied based on growth conditions. In vitro kinetics of serum-killing, phagocytosis and antibody and complement deposition indicated that a proportion of Salmonellae are phagocytised before serum-killing occurs and this may explain how the protective effects of anti-Salmonella antibodies are undermined in IFN\(\gamma\) deficiency. We studied targets of bactericidal antibodies using an optimised serum-adsorption procedure and a range of different NTS strains and serovars as well as LPS mutants. Antibodies against the immuno-dominant O-antigen (OAg) were a major target of bactericidal antibodies against NTS in human serum. These data support development of an OAg based vaccine against NTS. Finally, using electron microscopy, we showed the physical effects of serum-killing on Salmonellae and also demonstrated that a major difference between inhibitory and bactericidal serum was the quantity of complement deposited on Salmonellae.

Epstein-Barr virus (EBV) establishes a chronic infection, usually effectively controlled by the cellular immune response. However, EBV has the potential to escape immune control, such as during malaria exposure, or modulate the immune response. In this study, immune control of EBV was examined in Gambian children in two situations: during malaria exposure and early after EBV infection. Additionally, EBV infection may also inhibit vaccine induced antibody responses, hence its impact on a childhood pentavalent vaccine was studied, but infection had no effect. In contrast to historical studies, acute malaria infection was not associated with impaired immunity to EBV, a finding potentially explained by the declining malaria exposure in The Gambia. Children recently infected with EBV had evidence of activated EBV-specific T-cell responses, with latent and lytic epitope-specific responses of equal magnitude. Several donors identified as undergoing primary asymptomatic EBV infection had virus genome loads equivalent to those of acute infectious mononucleosis (AIM) patients. In contrast to AIM patients they did not show a peripheral lymphocytosis but did have significant expansions of activated EBV-specific CD8+ T-cells, which were lower or perhaps more focused than in AIM patients, suggesting that the highly expanded T-cell populations and not virus load drives AIM pathogenesis.

This thesis offers a comparative analysis of British wartime civilian internment policies, focusing on three key case studies: the South African War (1899-1902), the First World War and the Second World War. It seeks to determine the place of the ‗concentration camps‘ of the South African War within the history of internment and the extent to which world war internment episodes were shaped by both historical and contemporary experiences. It suggests that reactions to internment, at both state and popular levels, are revealing about Britain‘s self-image in relation to civil rights, justice and the treatment of minorities. In particular, the thesis argues that gender ideologies were highly significant in determining the development of internment policies, playing a central role in shaping popular images of the enemy and underpinning official assumptions about the treatment of women by the state. The debates and discussions which emerged around internment policy also provide insight into the ways in which the experience of war can accentuate the exclusion of minorities and the reinforcement of racial stereotypes. The thesis examines the ways in which racialized and gendered discourses converged during each conflict to create particular understandings of the enemy, which in turn had a discernible impact on the development of internment policies.