This study assessed the economic impact of the WKIEMP project on households in the Nyando and Yala river basins of Western Kenya. The survey included 362 households which together formed three groups – those formally involved in WKIEMP, those informally involved in WKIEMP and those not involved in WKIEMP. The data captured included variables on household characteristics and details of adoption behaviour of the interventions offered by the project. Further analyses in the paper modelled the adoption into impacts using a 20 year time horizon. From that model, benefit cost ratios, internal rates of return and net present values were calculated. These showed that there was a positive impact of the project before adding in additional carbon benefits. The analysis then contributed to an overall assessment of the project by the World Bank.
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