Download DAWASA - World Bank Group

Impact Evaluation of the
Community Infrastructure
Upgrading Program (LGSP),
Water intensification (DAWASA),
and Tanzania Social Action Fund
(TASAF)
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
Design: main evaluation of CIUP
vs. DAWASA
• Survey. Community and Household surveys in the lowincome settlements mtaas of Dar es Salam. Baseline
end 2005. Follow up survey end 2007.
• Sample of household survey Representative 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.
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
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
Surveying quality
• Water sampling across Dar es Salam. This
will include all communities covered by the
main CIUP/DAWASA evaluation (feasibility
to be investigated)