In Bolivia, potato production and marketing is important for farmers' livelihoods and anecdotal information shows that cell phones and women are extremely important in the potato marketing chain. Efforts to improve incomes of poor highland potato producers should recognize roles of different actors within the chain and access to market information. This study explores the effects of access to information and gender relations within the potato chain; on farmers' market channel choice in the Tiraque Watershed (Bolivia). The analysis of qualitative information was useful to deepen the understanding of the subject and complement quantitative analysis outcomes. The main source of data comes from a survey of 400 households from the watershed. Additionally, Rapid Market Appraisal and Case Studies were used to collect qualitative data. These data was used to estimate two econometric models (Logit and MNL) to evaluate the importance of farmers and marketing characteristics on market choices. This analysis demonstrates that the determinants that affect market channel choice include marketing (time to reach the markets and the nearest paved road), production (number of plots owned by farmers) and household related variables (access to loan, cell phone ownership, location and age of the head of the household). On the other hand, some results were different than expected, that is the case of motorized transport ownership, and literacy. Another unexpected result is that even though the qualitative analysis shows that gender plays an important role in marketing activities; the econometric analysis shows that gender has no effect on farmer's market choices. / Master of Science / LTRA-3 (Watershed-based NRM for Small-scale Agriculture)

This dissertation is composed of three essays; the first two examine the decisionmaking of potato producing households in Bolivia and the third examines well-being changes among Zimbabwe households. The first essay entitled “The role of risk mitigation in production efficiency: A case study of potato cultivation in the Bolivian Andes” estimates the costs of self-managing environmental risk through activity and environmental diversification. Risk management has the potential to reduce income variability but at the cost of increasing production inefficiency, which we measure employing a stochastic production frontier. Among variables capturing environmental diversification, discontinuity between fields has the most detrimental effect on production efficiency. Activity diversification, measured by the ratio of potato to total crop revenue, has a stronger impact on inefficiency and yield losses than any of the environmental diversification variables. The second essay entitled “Determinants of market participation decisions and marketing choices in Bolivia” examines three decisions related to potato market participation: market entry, volume sold, and market choice. The first two are analyzed using a Heckman selection model. Results indicate that isolation, measured by population density and distance to markets, negatively impacts market entry. The most important determinant of quantity sold is land holding. Market choices are judged according to second-order stochastic dominance (SOSD). Market choices meeting the SOSD criterion are referred to as optimal marketing strategies as they have the higher expected payoff for a minimal income variance. Results suggest that the probability of selecting an optimal marketing strategy increases with quantity sold, access to market information, and access to liquidity while it decreases with distance to markets. The third essay entitled “A profile of changes in well-being in Zimbabwe, 2001- 2007/8, using an asset index methodology” shows that it is possible to examine intertemporal and spatial changes in well-being in the absence of consumption expenditures data by using an asset index. The asset index was constructed using Polychoric Principal Component Analysis. Results indicate that poverty and extremely poverty grew significantly in rural Zimbabwe while in urban areas, poverty diminished and extreme poverty grew. / Ph. D. / LTRA-7 (Pathways to CAPS in the Andes)

Cross-cultural research requires tests of measurement invariance to determine if different populations have equivalent latent constructs. A psychometric assessment of the Agricultural Production Perspectives Scale (APPS) was necessary to determine the validity of the scale constructed and whether data from multiple countries could be compared. Using 918 farmers sampled from Kenya, Uganda, Mali, and Lesotho, I conducted exploratory factor analysis and scale reliability tests to determine whether the item loadings and factors were equivalent across populations. No factor structure could be obtained across country or agroecological populations. The data were reanalyzed within each agroecology to determine localized factor structures. Results indicate that a market driven factor and agrarian driven factor tend to emerge across multiple agroecologies suggesting some emergence of latent variables. Recommendations for scale revisions are included to increase reliability and measurement invariance. / Master of Science / CCRA-8 (Technology Networks for Sustainable Innovation)