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Gottfried Wilhelm Leibniz Universität Hannover (2019)

Essays on livestock technology, diversification and welfare impact in sub–Saharan Africa

Weyori, Alirah Emmanue

Titre : Essays on livestock technology, diversification and welfare impact in sub–Saharan Africa

Auteur : Weyori, Alirah Emmanue

Université de soutenance : Gottfried Wilhelm Leibniz Universität Hannover

Grade : Doctor rerum politicarum 2019

Résumé partiel
Livestock production remains a critical aspect of rural livelihoods serving different purposes especially for the poor in developing countries. Enhanced livestock productivity thus has the potential to stimulate growth in a sustainable way and also to strengthen and improve welfare. This is especially critical in sub-Saharan Africa (SSA) in the face of imperfect input and output markets, missing credit and insurance markets, as well as limited off-farm employment opportunities. However, livestock productivity is constrained by the incidence of diseases and the use of obsolete technologies. Yet, studies show that livestock of the poor are more vulnerable to diseases because of inadequate investments in health improving techniques and technologies approaches. This thesis aims to contribute to an improved understanding of the adoption behavior of modern livestock interventions and their impact on household welfare in SSA. Specifically, the thesis sets out to investigate : (1) the drivers of adopting the so called “best–bet” African Animal Trypanosomosis (AAT) management technologies and its impact on household food security ; (2) the relationship between disease management practices such as deworming, vector control, veterinary treatment, and feed supplements. Specifically, the thesis investigates if these practices are adopted as complements or substitutes and what factors drive their adoption ; 3) the returns to livestock disease control interventions especially linking interventions to animal productivity and household vulnerability and poverty and (4) the role of household diversification with respect to crop and livestock production in adapting to climate variability. The data for this thesis comes from small scale cattle farmers in the Kara and Savana regions of Togo and the Southern Nations Nationalities and People Region (SNNPR) of Ethiopia. Selection of respondents involved multi stage random sampling procedures to ensure equal probability of being selected given the geographically dispersed nature of the study region. Two waves of data were collected in Togo while one wave has been collected in Ethiopia. In 2013, a total of 486 and 492 households from Togo and Ethiopia respectively were interviewed. In 2016, a follow up survey was conducted in Togo involving the same households interviewed in 2013. A comprehensive data set consisting of household socio-economic information, involving all kinds of income generating activities such as self-employment, off-farm employment and other on-farm wage employments undertaken in the period. Noteworthy are the information on cattle production such as herd composition, disease and pest incidences, and health management. Household risks and shocks as well as assets, consumption and food security indicators have been collected. In addition to the household level data, village level information such as disease severity and incidence, drug resistance and village level institutions and infrastructure have been collected through stakeholder interviews in 2013. Different methodological approaches have been used to analyze the data in this thesis. In the first paper, the household utility maximization theory under risks and imperfect markets forms the basis for the empirical estimation of the household adoption decision and impact of rational drug use on food security. A binary logit model is used to estimate the factors influencing adoption while the Propensity Score Matching (PSM) is used to determine the impact on food security outcome.

Mots clés  : adoption, impact, livestock, diversification, vulnerability, climate variability, Ethiopia

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Page publiée le 5 avril 2020