Mapping the benefits: developing a new decision tool for tsetse and trypanosomiasis interventions
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The purpose of this study was to investigate the feasibility of linking quantitative economic variables to a geographical information system (GIS) spatial framework in order to provide new insights and reinforce the decision-making process for tsetse and trypanosomiasis (T&T) interventions. Hitherto, GIS studies have mapped a series of ecological, demographic and socio-economic indicators, but have stopped short of mapping the distribution of a derived measure quantified in monet ary units. Furthermore, the economic aspects of T&T control have historically been dealt with separately from their other effects, with results usually expressed in terms of benefit–cost ratios or extra income per head of livestock. Even when they have been expressed in terms of dollars per square kilometre these results have not been mapped; instead they have been used as inputs for benefit–cost type analyses. In contrast, our approach combines – for the first time – economic he rd models with mapping of both breed/production systems and the expansion of livestock populations under various scenarios.