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This dissertation consists of three essays. In the first one (Chapter three), "Gains and Losses from Household Formation," I introduce a general equilibrium model, wherein a household may consist of more than one member, each with their own preferences and endowments. In these models at first, individuals form households. Then, collective decisions (or bargaining) within the household specifies the consumption plans of household members. Finally, competition across households determines a feasible allocation of resources. I consider a model with two types of individuals and pure group externalities. I investigate the competitive equilibrium allocation and stability of the equilibrium in that setting. Specifically, I show that under a certain set of assumptions a competitive equilibrium with free exit is also a competitive equilibrium with free household formation. Similar results are obtained for a special case of consumption externality. Illustrative examples, where prices may change as household structures change, are used to show how general equilibrium model with variable household structure works and some interesting results are discussed at the end of the first essay. In the second essay (Chapter four), “Effects of the Price System on Household Labor Supply,” I introduce leisure and labor into the two-type economy framework that was constructed in the first essay. The main objective of this essay is to investigate the effects of exogenous prices on the labor supply decisions, and completely analyze the partial equilibrium model outcomes in a two-type economy setting. I assume a wage gap and explore the effect of that gap on labor supply. The main content of the second essay is the analysis of the effect of change in wages, price of the private good, power of each individual in the household, relative importance of private consumption compared to leisure, and the level of altruism on individual's decisions about how much private good or leisure he/she wants to consume. The effect of a relative price change on labor supply, private consumption and utility level is also investigated. Moreover, one of the variations of Spence's signaling model is borrowed to explain why higher education of women in Iran does not necessarily translate into higher female labor force participation. Finally, fixed point theorem is used to calculate the power (or alternatively labor supply) of individuals in the household endogenously for the two-type economy with labor at the end of this essay. In the third essay (Chapter five), “Dynamics of Poverty in Iran: What Are the Determinants of the Probability of Being Poor?,” I explore the characteristics of the households who fall below the poverty line and stay there as well as those who climb up later. I decompose poverty in Iran into chronic and transient poverty, and investigate the relation of each component of poverty with certain characteristics of households. I also study mobility and the main characteristics of growth in expenditure of households. One of the main issues in economic policy making nowadays is the evaluation of effectiveness of anti-poverty programs. In order to achieve this goal one should be able to track down a household for a period of time. In this essay, I am going to investigate the dynamics of poverty in Iran during 1992-95. I am especially interested in finding the characteristics of the households that fall below the poverty line and stay there in addition to those that climb up later. Obviously, if policy-makers want to have efficient policies to reduce poverty, they should target the former group. I decompose poverty in Iran into chronic and transient poverty, and investigate the relation of each component of poverty with certain characteristics of households. I also study mobility in this period with an emphasis on mobility in and out of poverty and review the main characteristics of the growth in expenditure of households. / Ph. D.

Multiple chronic conditions (MCCs) are defined as two or more health conditions, each requiring treatment and limiting activities for a year or more. In the United States (US), MCCs are more common and costly than any individual chronic condition. The number of adults aged 65 years and older with MCCs is projected to nearly double between 2020 and 2050. Patients with MCCs often experience poor self-reported health and negative symptoms. In addition, they frequently visit emergency departments (EDs) and are hospitalized. Patients with MCCs need ongoing primary care services to manage their symptoms and prevent health deterioration. However, over 20% of the US population (many of whom have MCCs) resides in a primary care Health Professional Shortage Area (HPSA) and experiences poor access to primary care. The growing nurse practitioner (NP) workforce, which is projected to almost double in size between 2018 and 2030, can help meet the demand. Most NPs are trained to diagnose, treat, and manage chronic conditions and can provide a scope and quality of primary care comparable to physicians in many populations. Therefore, if distributed and supported strategically, the NP workforce can meet the complex care needs of patients with MCCs, especially in HPSAs. Maximizing the potential of the NP workforce to deliver MCC care will require enhanced care environments in the practices where NPs work, characterized by administrative support for NP care delivery and autonomous practice, collegial relationships between NPs and physicians, and NP professional visibility. On the other hand, poor NP care environments can negatively affect the quality of chronic disease care. Thus, improving the NP care environments within practices may increase the capacity of the NP workforce to care for MCC patients. Despite the potential of the NP workforce to meet the need for primary care among patients with MCCs, little is known about the impact of NP-delivered primary care models on outcomes in this population. Furthermore, the impact of HPSA status and NP care environments on NPs’ ability to care for patients with MCCs remains poorly understood. Thus, the overall purpose of this dissertation is to produce evidence on NP-delivered primary care models for patients with MCCs and examine the interplay between practice and community factors in shaping outcomes for these patients. In chapter 1, we introduce the unique healthcare needs of patients with MCCs, and the role of NPs in delivering and expanding access to care. In chapter 2, we synthesize the existing evidence on the effect of NP primary care models, compared to models without NP involvement, on cost, quality, and service utilization by patients with MCCs. Our synthesis suggests that NP-delivered primary care has similar or better impacts on outcomes among patients with MCCs compared to care delivered without NP involvement. In chapter 3, we perform secondary data analysis using multiple linked data sources including 1) patient data from the Medicare claims of 394,424 older adults with MCCs, 2) NP survey data on practice characteristics from 880 NPs at 779 primary care practices across five US states, and 3) data on HPSA status of the practice locations from the Health Resources and Services Administration. We examine differences in hospitalization and ED use among patients who receive care from NP practices in HPSAs compared to those in non-HPSAs. We find a higher likelihood of ED use among patients receiving care in NP practices located in HPSAs compared to practices in non-HPSAs, and no difference in the likelihood of being hospitalized. Our results suggest that relieving provider shortages may reduce ED use by MCC patients in HPSA practices that employ NPs, but may be insufficient to lower hospitalization rates unless combined with other interventions. Finally, in chapter 4, we analyze the same linked secondary data source as in chapter 3 to examine the effect of the NP care environment (measured by the NP survey) on the relationship between the HPSA status of the practice location and ED or hospital use among patients with MCCs. We find that the NP care environment moderates the association between primary care provider shortage areas and hospitalization but not ED use. Further analysis reveals that improved NP care environments have a more pronounced association with lowered odds of hospitalization among patients receiving care from practices located in areas with no shortage of primary care providers (i.e., non-HPSAs) compared to those receiving care in practices with provider shortages (i.e., HPSAs). Our findings suggest that improving the care environment may not have the effect of reducing MCC patients’ need for hospitalization unless sufficient providers are also available to care for patients. We suggest that cohesive solution sets addressing practice- and community-level interventions simultaneously may be needed to improve hospitalization outcomes for patients with MCCs. In the concluding chapter of this dissertation, chapter 5, we present a summary of findings, discuss the dissertation’s strengths, limitations, and its contributions to science. In this chapter, we also discuss implications for policy, practice, and directions for future research.

Wild foods are an integral component of the household food basket, yet their quantified contribution to food security relative to other sources in the context of HIV/AIDS, climate change and variability remains underexplored. This study was carried out in Willowvale and Lesseyton which are rural communities in the Eastern Cape province of South Africa. Willowvale is a relatively remote, medium-rainfall coastal community, while Lesseyton is a peri-urban low rainfall inland community. Qualitative and quantitative methods were used to collect data from 78 HIV/AIDS afflicted households with 329 individuals and 87 non-afflicted households with 365 individuals in the two study sites. Households were visited quarterly over 12 months to assess food acquisition methods, dietary intake and quality, and levels of food security, and to determine strategies employed by households to cope with droughts. The wild foods investigated were wild meat, wild birds, wild fish, wild mushrooms, wild leafy vegetables and wild fruits. Diets were moderately well-balanced and limited in variety, with cereal items contributing 52 % to total calorie intake. Mid-upper arm circumference measurements showed that all respondents were adequately nourished. The bulk of the food consumed by households was purchased, with supplementation from own production, wild vegetables and wild fruits. In Willowvale, wild vegetables comprised 46 % of overall vegetable consumption for afflicted households and 32 % for non-afflicted households, while own fruit production comprised 100 % of fruit consumption. In Lesseyton, wild vegetables comprised only 6 % and 4 % of vegetable consumption for afflicted and non-afflicted households, while wild fruit comprised 63 % and 41 % for afflicted and non-afflicted households. More than 80 % of respondents from both afflicted and non-afflicted households had sufficient daily kilocalories, although the majority of afflicted households felt they were food insecure and sometimes collected wild foods as one of their multiple coping strategies. Hunting and gathering of wild foods was associated with site, household affliction status, gender, age and season. More than 80 % of respondents ate wild vegetables and said they were more drought tolerant than conventional vegetables, making them the most consumed wild food and approximately 16 % of respondents ate wild birds, making them the least consumed wild food. Approximately 14 % of respondents from afflicted households in Willowvale sold wild fish, whilst 34 % of respondents from afflicted households and 7 % from non-afflicted households sold wild fruits in Lesseyton. Strategies adopted by households to cope with droughts were different between the two study sites, and households in Willowvale used a wider range of strategies. Given the devastating effects of HIV/AIDS coupled with the drawbacks of climate change and variability on food security, wild foods represent a free and easy way for vulnerable households to obtain food.

How should the impact of HIV and AIDS on rural livelihoods be factored into efforts to monitor and stabilise household food security? With both HIV and AIDS and food security at the top of the global development agenda, this is a question posed by many scholars, practitioners, donor agencies and government departments. However, while there is an excess of discourse outlining the theoretical bases for how HIV and AIDS can, and is, radically transforming household food acquisition; there is a lack of empirical evidence from the South African context that demonstrates if, and how, HIV and AIDS changes household-level strategies of food acquisition and intake. This thesis explores the association of household-level mortality, chronic illness and additional child-dependent fostering with household experience of food security and food acquisition strategies, in three rural villages in the Eastern Cape and KwaZulu-Natal Provinces of South Africa. Qualitative and quantitative methods of data-collection were applied to 307 households in the three sites. For twelve months, both HIV and AIDS-afflicted and non-afflicted households were repeatedly visited at 3-month intervals, in order to be assessed for levels of food security, dietary intake and method of food procurement (purchased, cultivated, wild or donated). Overall, HIV and AIDS-afflicted households showed a significantly higher experience of food insecurity, probably attributable to shortages in food quantity. Dietary composition and overall diversity, however, was not significantly different. Although households with chronic illness and recent mortality showed a heightened investment in cultivation sources, the success of these strategies were to a great extent mediated by household income, and the level of medical treatment received by those who were chronically ill. Chronic illness was also associated with more donations, but these required considerable investments in social capital networks. Finally, use of wild leafy vegetables was not associated with household HIV and AIDS status, despite the financial, nutritional and labour-saving properties of these foods. Overall, the study suggests that there was little evidence of long-term planning and strategy in household food security responses. There was no evidence for shifts to labour-saving crops or foods and, in some instances, child labour was being used to ameliorate prime-adult labour deficits. Moreover, given that the vast majority (89.2%) of food groups were sourced through purchase, it is questionable whether investing in diverse food acquisition strategies would be advisable. Unless supported by medical treatment and steady earned household income, policies to promote intensified household agricultural subsistence production in the wake of HIV and AIDS are unlikely to provide households with anything more than short-term safety-nets, rather than long-term, sustainable food security solutions.

This qualitative study focuses on the experiences of adults with Charcot-Marie-Tooth disease (CMT), a neuromuscular condition, and explores what living with this disease encompasses. The study is structured around two fundamental research questions that amount to people's experiences regarding how (in which areas) the disease affects them, and how they continuously deal with it. In order to address the research questions, data gathered from participants was qualitatively analysed, using grounded theory methodology. The study culminated in the formulation of a substantive grounded theory as to how affected people manage the disease's manifestations in order to optimise their continuous adaptation and well-being. A tripartite of concerns comprised the core concern, whereas the basic social psychological process of engaging with CMT emerged as the core strategy used by affected people to deal with the concerns. The core's three sub processes constituted three mostly sequential stages that CMT-affected people pass through in their adaptation to the disease. The identified theory and existing stage models of adaptation to chronic illnesses and disabilities were juxtaposed and discussed. The three stages were compared to and integrated with the relevant literature. These actions revealed that there are a number of new formulations and processes contained in all three stages, and that the first and last stages (orientating and optimising) are themselves unique. It emerged that there is no theoretical end-point to the adaptation process, but that a relative saturation point amounted to a variant of an outcome, called qualified wellness. For most, the core strategy was successful in resolving the main concern. A few, however, still experienced fear and agony about inheritance and dependency issues. This study contributes, via the route of knowledge and insight empowerment, to the well-being of people with CMT, including those who are struggling but do not know that they have this disease. Broadening of insight may also benefit medical help professionals and streamline service delivery. / Psychology / D. Litt. et Phil. (Psychology)

In order to obtain a closer look into the psychosocial impact of chronic conditions, symptom severity, loss of resources, and demoralization were investigated through a mediation analysis. The function and implication of social support was also explored within the circumstances of chronic conditions. Lastly, symptom chronicity was probed as an influential element in the understanding of the consequences of being chronically ill. Participants were 200 men and women, with a mean age of 46 years, and the dataset came from the VOICE (Verification of Illness and Coping Experience) survey. The concepts of Conservation of Resources (COR) theory and Demoralization Syndrome were utilized to portray the underlying processes experienced by individuals with chronic condition. Analyses between symptom severity and demoralization via loss of resources as the mediator were statistically significant. Symptom chronicity did not interact with symptom severity on predicting loss of resources, but analyses showed that individuals with less symptom chronicity reported both larger loss of resources and demoralization. Social support was confirmed as a moderator, buffering the effects of symptom severity on loss of resources. Exploratory analyses with the inclusion of both symptom severity and chronicity as the predictor variable and the use of age as a moderating factor at the prediction of loss of resources was statistically significant, showing that when symptoms were more severe and chronic, younger participants experienced more losses than older participants. Additionally, when age was included as a moderator of the effect of symptom chronicity and severity on the prediction of social support, it was indicated that when symptoms were less chronic and severe, the average perception of social support was higher among younger participants, but, on the other hand, when symptoms were more chronic and severe, younger participants suffered an abysmal drop in their social support perception. In light of the aforementioned results, risk, protective, and developmental aspects are discussed, along with implications for health care providers.

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / ApÃs duas dÃcadas dos primeiros registros da SÃndrome da ImunodeficiÃncia Adquirida (Aids) no Brasil, a assistÃncia à saÃde de pessoas com HIV/Aids ainda à um desafio. Nesse contexto, discute-se a necessidade de efetivar uma polÃtica de atenÃÃo integral a essa populaÃÃo, em especial à saÃde bucal, sendo que o Programa de SaÃde da FamÃlia (PSF) representa uma possibilidade potencial de enfrentamento desse problema. Este estudo tem como objetivo caracterizar as estratÃgias polÃticas e organizacionais da atenÃÃo odontolÃgica a pessoas vivendo com HIV/Aids no MunicÃpio de Fortaleza, CearÃ, e verificar a existÃncia de assistÃncia odontolÃgica na rede bÃsica do MunicÃpio de Fortaleza a pessoas portadoras da doenÃa. A metodologia consistiu, primeiramente, em pesquisa qualitativa documental baseada em revisÃo sistemÃtica da literatura e documentos tÃcnicos do MinistÃrio da SaÃde, do Estado do Cearà e do MunicÃpio de Fortaleza. No segundo momento, optou-se pelo estudo quantitativo, usando como fonte de dados secundÃrios o Sistema de InformaÃÃo de Agravos de NotificaÃÃo - SINAN e, por fim, uma descriÃÃo da realidade por meio da aplicaÃÃo de um questionÃrio a 186 cirurgiÃes-dentistas (CDs) inseridos no PSF de Fortaleza. A anÃlise baseou-se em estatÃstica descritiva, utilizando tabelas e mapas temÃticos para possibilitar uma distribuiÃÃo espacial da doenÃa em Fortaleza, alÃm da anÃlise documental. Encontrou-se pouca documentaÃÃo oficial (polÃticas e diretrizes) relacionada à atenÃÃo a saÃde bucal de pessoas com HIV/Aids, em especial, na esfera federal, que tem como principal material disponÃvel artigos e manuais, em sua maioria, relacionados à biosseguranÃa e a lesÃes bucais oportunistas. No nÃvel municipal, encontrou-se a maior parte da documentaÃÃo oficial. Observou-se que, atà 2007, o nÃmero de pessoas com HIV/Aids vivas residentes em Fortaleza foi de 3.311 e que essas pessoas residem distribuÃdas por todo o MunicÃpio. Constatou-se que mais da metade (58,06%) dos CDs que trabalham no PSF tÃm conhecimento sobre a presenÃa de pessoas portadoras de HIV/Aids, entretanto, apenas 29,57% confirmaram ter atendido essa demanda na unidade onde trabalham. O atendimento odontolÃgico destinado a esse mesmo pÃblico nÃo ocorreu igualmente em todo o municÃpio de Fortaleza, sendo concentrado mais em alguns locais, destacando-se a Secretaria Executiva Regional II. Conclui-se que, apesar do Programa Nacional de DST/Aids ser reconhecido internacionalmente, hà a necessidade de avanÃar na discussÃo sobre a saÃde bucal dessa populaÃÃo e que a assistÃncia odontolÃgica a pessoas com HIV/Aids nÃo està consolidada como aÃÃo de saÃde bucal do PSF, embora jà exista uma polÃtica municipal direcionada para esse fim, indicando a necessidade de reorganizaÃÃo e reorientaÃÃo da assistÃncia odontolÃgica a pessoas com HIV/Aids. / Two decades following the first cases of the Acquired Immunodeficiency Syndrome (Aids) registered in Brazil, health care for individuals living with HIV/Aids is still a significant challenge. Within this context, the need to implement an integrated health policy for this group has been frequently discussed. This is particularly relevant for oral health services, where the Family Health Program (PSF-Programa SaÃde da FamÃlia) offers a potential tool to address this issue. This study has the objective of examining the political and organizational oral health strategies for people with HIV/Aids in the municipality of Fortaleza, Cearà state, and verifying the extent of oral care services in the municipal basic health structure. The methodology consisted of a qualitative and documentary study based on a systematic review of the literature and technical guidelines issued by the Ministry of Health and the secretariats of the State of Cearà and Municipality of Fortaleza. Additionally, the researchers used a quantitative approach using secondary data from the National Notifiable Diseases Health Information System (SINAN - Sistema de InformaÃÃo de Agravos de NotificaÃÃo). Finally, a snapshot of current conditions was taken by means of a questionnaire applied to 186 dental surgeons (DS) working in the PSF in Fortaleza. Analysis was undertaken using descriptive statistics, in particular tables and thematic maps to display the spatial distribution of the disease in Fortaleza, in addition to the literature review. Relatively little official documentation was found (policies and technical guidelines) relative to the oral health services for people living with HIV/Aids, especially at the federal level which only has articles and manuals available, mostly dealing with biosecurity and opportunistic oral lesions. The majority of official documentation was found at the municipal level. The study showed that until 2007, there were 3,311 people living with HIV/Aids in Fortaleza and that these individuals reside throughout the municipality. It was also determined that over half (58.06%) of the DS working in the PSF are aware of the presence of people with HIV/Aids in their working area, yet only 29.57% affirmed that they had treated members of this group in their health unit. The oral health care offered to this group was not equally distributed in the municipality; rather it was concentrated in a few locations, particularly the Executive Secretariat of Region II. It has been concluded that, despite international recognition given to the Brazilian National STD/Aids Program, it is necessary to move forward the debate on oral health services offered to this population group and that the treatment given to people with HIV/Aids has not been consolidated as a key component of oral health services offered by the PSF. This goes against a municipal policy already in existence directed towards this goal, thereby indicating the need for the reorganization and reorientation of the oral health care available to people with HIV/Aids.

This qualitative study focuses on the experiences of adults with Charcot-Marie-Tooth disease (CMT), a neuromuscular condition, and explores what living with this disease encompasses. The study is structured around two fundamental research questions that amount to people's experiences regarding how (in which areas) the disease affects them, and how they continuously deal with it. In order to address the research questions, data gathered from participants was qualitatively analysed, using grounded theory methodology. The study culminated in the formulation of a substantive grounded theory as to how affected people manage the disease's manifestations in order to optimise their continuous adaptation and well-being. A tripartite of concerns comprised the core concern, whereas the basic social psychological process of engaging with CMT emerged as the core strategy used by affected people to deal with the concerns. The core's three sub processes constituted three mostly sequential stages that CMT-affected people pass through in their adaptation to the disease. The identified theory and existing stage models of adaptation to chronic illnesses and disabilities were juxtaposed and discussed. The three stages were compared to and integrated with the relevant literature. These actions revealed that there are a number of new formulations and processes contained in all three stages, and that the first and last stages (orientating and optimising) are themselves unique. It emerged that there is no theoretical end-point to the adaptation process, but that a relative saturation point amounted to a variant of an outcome, called qualified wellness. For most, the core strategy was successful in resolving the main concern. A few, however, still experienced fear and agony about inheritance and dependency issues. This study contributes, via the route of knowledge and insight empowerment, to the well-being of people with CMT, including those who are struggling but do not know that they have this disease. Broadening of insight may also benefit medical help professionals and streamline service delivery. / Psychology / D. Litt. et Phil. (Psychology)

Having a chronic illness may feel alienating, yet examination of the literature shows limited research on social connectedness and health. In order to contribute to the understanding of this impact of illness, I examined perceived levels of social connectedness in persons with chronic diseases (CD), functional somatic syndromes (FSS) and medically unexplained symptoms (MUS). A major focus of this study was to investigate the association of social connectedness with depression, anxiety, and general health in patients with ongoing symptoms of illness. Data collection was obtained through the use of four online surveys collectively known as VOICE (Verification of Coping, Illness and Experience). For the purposes of this study, five measures were used: the Social Connectedness Scale, Short Form Health Survey (SF-36), Patient Health Questionnaire depression scale (PHQ-8), Hopkins Symptoms Checklist (HSCL) and the Social Impact Scale. Participants were recruited through announcements via online message boards and support groups, as well as through the distribution of brochures in local medical practices. A total of 148 participants (80% female) completed all four surveys. Results indicated that the chronic illness groups did not significantly differ in social connectedness, although there was some indication that the FSS group felt more social isolation. Regression analyses indicated that, while accounting for socio-cultural and health factors, social connectedness was the strongest predictor of depression (β = - .43, p < .001), anxiety (β = -.48, p < .001) and general health (β = .34, p < .001) in chronically ill persons. The independent and robust relationship of social connectedness with psychological and physical health in individuals with chronic illness suggests that this is an important factor deserving of future research with important clinical applications.