African Safety Engineering | 08 May 2007
Methodological Evaluation of Water Treatment Facilities Systems in Ethiopia Using Difference-in-Differences for Yield Improvement Assessment
W, o, y, k, e, G, u, t, a, ,, M, e, k, d, e, s, A, l, i, ,, F, a, s, i, l, N, e, g, u, s, s, e
Abstract
Water treatment facilities in Ethiopia have been implemented to improve drinking water quality and public health. However, there is a need for methodological evaluation to assess their effectiveness. A difference-in-differences (DID) model will be employed to analyse the impact of implemented water treatment facilities on yield outcomes. The DID approach will account for pre-existing trends and potential confounders, ensuring robust estimates of the intervention's effect. An analysis of treated water yields from selected Ethiopian sites showed an average increase of 15% in yield following the installation of new treatment systems. The difference-in-differences method demonstrated significant yield improvement attributable to the introduction of new water treatment facilities, providing evidence for their efficacy and potential for scale-up. Further research should focus on understanding the specific factors contributing to yield improvements and exploring ways to enhance system sustainability in resource-limited settings. The maintenance outcome was modelled as $Y<em>{it}=\beta</em>0+\beta<em>1X</em>{it}+u<em>i+\varepsilon</em>{it}$, with robustness checked using heteroskedasticity-consistent errors.