Browsing by Subject "Food Security"
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Item Impact of HIV/AIDS on the Agricultural Sector in Northern Namibia(2011-02-22) Carter, Charles RussellIn agrarian societies, HIV/AIDS extends far beyond the realm of healthcare into agricultural production and food security as well. Namibia is a developing country with a large portion of its population involved in agriculture; the average HIV/AIDS infection rate of 21.3% in the country leaves a large portion of agricultural workers living with or affected by HIV/AIDS. The purpose of this study was to further evaluate the impact of HIV/AIDS on national and community level food security in northern Namibia by ascertaining the perceptions and experiences of local farmers living with HIV/AIDS. In addition, this research aims to define the specific training needs for this population, and to identify possible barriers to access. Four focus groups and four key informant interviews were conducted in northern Namibia, and participants were asked a variety of questions relating to People Living with HIV/AIDS (PLWHA) in agriculture. Qualitative analysis drew out prevailing themes and ideas from the data. This study found that there is a greater need for HIV/AIDS specific education and programs targeted to HIV/AIDS infected agrarian workers. Additionally this study found there were barriers to education present in the current system, and identified needs for joint programming initiatives between the ministries of health and agriculture.Item Impact of the National School Lunch Program on Children's Food Security(2012-07-16) Gao, XiangThe U.S. is the world's largest economy, accounting for about 20% of world Gross Domestic Product (GDP). With a high income and a mature welfare system, households in the U.S. should have enough food and healthy diets, especially for children. However, the U.S. Department of Agriculture (USDA) reported that 9.8% of households with children were considered food insecure in 2010. The National School Lunch Program (NSLP) is the second largest federally assisted food program and aims to provide nutritious, well-balanced lunches for school-age children. This thesis examined the association between NSLP participation and children's food security, using the third School Nutrition Dietary Assessment study (SNDA-III). An 18-item household module was used to measure the food security status of children. An ordered probit model was estimated using a two-stage instrumental variable approach in order to address the endogeneity of program participation. We found that students with enough time to eat lunch were 12% more likely to participate in NSLP. Student participation in NSLP was also influenced by the receipt of free/reduced priced meals, being elementary or middle school age, residing in rural area, parents' having a lower education level and living in a single parent household with one employed parent or in two-parent household with both parents employed. The second stage of the model indicates that receipt of free/reduce price meals, household structure and employment, school level, race, and education have significant effects on food security status. Moreover, we found that children from marginally food-secure households have characteristics similar to those from food insecure households rather than highly food-secure households. After controlling for the endogeneity of program participation, we could not find evidence to support program participation having a significant effect on children's food security. To confirm our findings we used adult and child food security modules as alternative food security measures. A bivariate probit model was estimated as an alternative model, but there was still no significant association between NSLP and food security status. A possible reason that NSLP has no effect on food security was that participating children did not intake significantly more calories from school lunch.Item Three Essays on Climate Change Impacts, Adaptation and Mitigation in Agriculture(2012-10-19) Wang, Wei WeiThis dissertation investigates three economic aspects of the climate change issue: optimal allocation of investment between adaptation and mitigation, impacts on a ground water dependent regional agricultural economy and effects on global food insecurity. This is done in three essays by applying mathematical programming. In the first essay, a modeling study is done on optimal temporal investment between climate change adaptation and mitigation considering their relative contributions to damage reduction and diversion of funds from consumption and other investments. To conduct this research, we extend the widely used Integrated Assessment Model?DICE (Dynamic Integrated Climate Economy) adding improved adaptation modeling. The model results suggest that the joint implementation of adaptation and mitigation is welfare improving with a greater immediate role for adaptation. In the second essay, the research focuses on the ground water dependent agricultural economy in the Texas High Plains Region. A regionally detailed dynamic land allocation model is developed and applied for studying interrelationships between limited natural resources (e.g. land and groundwater), climate change, bioenergy demands and agricultural production. We find out that the effect varies regionally across hydrologically heterogeneous regions. Also, water availability has a substantial impact on feedstock mix. In terms of biofuel feedstock production, the model results show that limited water resource cannot sustain expanded corn-based ethanol production in the future. In the third essay, a Computable General Equilibrium (CGE) model is applied in an attempt to study potential impacts of climate change on global food insecurity. Our results show that climate change alters the number of food insecure people in a regionally different fashion over time. In general, the largest increase of additional food insecure population relative to the reference case (no climate change) is found in Africa and South Asia, while most of developed countries will benefit from climate change with a reduced proportion of food insecure population. In general, climate change affects world agricultural production and food security. Integrated adaptation and mitigation strategy is more effective in reducing climate change damages. However, there are synergies/trade-offs between these two options, particularly in regions with limited natural resources.