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Impact Evaluation of Tanzania Infrastructure and Water Projects

Evaluate the impacts of two projects, Community Infrastructure Upgrading and Water Intensification, on low-income settlements in Tanzania. Conduct surveys and community matching to compare infrastructure and water effects using propensity score matching.

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Impact Evaluation of Tanzania Infrastructure and Water Projects

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  1. Impact Evaluation of the Community Infrastructure Upgrading Program (LGSP), Water intensification (DAWASA), and Tanzania Social Action Fund (TASAF)

  2. Community Infrastructure Upgrading Program (CIUP) and Water Intensification (DAWASA) Projects description: • The Community Infrastructure Upgrading Program of LGSP will provide a package for upgrading basic infrastructure and services in 16 selected low-income settlements of Dar es Salam. • DAWASA will provide water intensification (ho. connections and water points) to all communities (progressively during the next 5 years) including the 16 CIUP communities. The CIUP communities will be covered in the next two years. Objective: Evaluate the total impact of a package of infrastructure upgrading and relative to investments in water upgrading alone

  3. Design: main evaluation of CIUP vs. DAWASA • Survey. Community andHousehold surveys in the low-income settlements mtaas of Dar es Salam. Baseline end 2005. Follow up survey end 2007. • Sample of household surveyRepresentative sample of households from • 16 CIUP communities, • 30 DAWASA only communities, and • 40 non-beneficiary communities. • Sample size (86x30)= 2,780 households • Survey cost (2780x$50x2)=$278,000 • Community survey will cover the 86 communities. The community survey will be used to match communities together with selected indicators from the household survey. Community survey cost (86x100)=$8600.

  4. Design: main evaluation of CIUP vs. DAWASA • Method. Propensity score matching of communities using baseline data: match • CIUP communities to DAWASA communities • CIUP communities to non-beneficiary communities • DAWASA communities to non-beneficiary communities • Average treatment effects estimated as difference in difference: • Infrastructure except water effect = (Y2-Y0)CIUP-(Y2-Y0)DAWASA • Infrastructure effect = (Y2-Y0)CIUP-(Y2-Y0)N-BEN • Water effect = (Y2-Y0)DAWASA-(Y2-Y0) N-BEN

  5. Evaluation of water intensification • Background. Water intensification interventions are implemented progressively from the costal area into the inland along three trunk corridors • Objective: evaluate impact of water intensification and validate water results from main evaluation above • Method. • Moving pipeline comparison. • Measure outcomes either side of the rehabilitation frontier at various points in time along the corridor (Pugu Road) • 4 surveys 1 year frequency. Sample size 100 households. Surveys costs $50x100 ho.x4surveys=$20,000 • Average treatment effect will be estimated every year as: • Average water effect = (Y1-Y0)WITHIN FRONTIER-(Y1-Y0)OUTSIDE FRONTIER

  6. Surveying quality • Water sampling across Dar es Salam. This will include all communities covered by the main CIUP/DAWASA evaluation (feasibility to be investigated)

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