Arianna Legovini Head, Development Impact Evaluation Initiative (DIME) World Bank
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Transcript of Arianna Legovini Head, Development Impact Evaluation Initiative (DIME) World Bank
PREM WeekApril 2009
Arianna LegoviniHead, Development Impact Evaluation Initiative (DIME)World BankImpact Evaluation for Real Time Decision Making
Do we know… Can leadership and motivation alone break
the poverty trap? –Rwanda rapid results initiative
Can participation change local norms and institutions? –Sierra Leone institutional reform & capacity building/gobifo
What type of information can enhance local accountability? –Uganda schools’ budget
What is the best way to select local projects? –Indonesia direct voting versus representatives’ decisions
Do audits increase accountability in public administration? –Indonesia, Brazil
Of course we know!?
These are difficult questions…We turn to our best judgment for
guidance and pick an incentive, subsidy level, a voting scheme, a package of services…
Is there any other incentive, subsidy, scheme or package that will do better?
The decision process is complex
A few big decisions are taken during design but many more decisions are taken during roll out & implementation
DesignEarly roll outImplementation
Developing a decision tree for public procurement …
Road Authority procurement of rural roads O&MSmall contractsFixed-cost contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiation
Adjustable contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiationLarge contractsFixed-cost contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiation
Adjustable contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiation
How to select between plausible alternatives?
Establish which decisions will be taken upfront and which will be tested during roll-out
Scientifically test critical nodes: measure the impact of one option relative to another or to no intervention
Pick better and discard worse during implementation
Cannot learn everything at onceSelect carefully what you want to test
by involving all relevant partners
Impact evaluationApplication of the scientific method to
understand and measure behavioral response Hypothesis
▪ If we subdivide contracts then more companies will bid for the contract
Testing ▪ Randomly assign which bids will be subdivided in smaller size
contracts and compare number of bidders and bidding price relative to engineering costs
Observations▪ Smaller contract size increases number of bidders ▪ Bidding prices fall▪ Costs of administering contracts rise
Conclusion ▪ Smaller contract size increases competition in the bidding
procedure
Walk along a decision tree for public procurement …
Road Authority procurement of rural roads O&MSmall contractsFixed-cost contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiation
Adjustable contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiationLarge contractsFixed-cost contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiation
Adjustable contractConceal engineering costsAllow renegotiationDeny renegotiation
Advertize engineering costsAllow renegotiationDeny renegotiation
In Okhlahoma, publication of engineering
costs lowered procurement costs by 4.6%
Andhra Pradesh e-procurement
increased bidder
participation by 25%
What is Impact Evaluation?Counterfactual analysis isolates the
causal effect of an intervention on an outcome Effect of contract size on number of bidders Effect of renegotiation option on bidding
price Effect of information on price
Compare same individual with & without option, information etc. at the same point in time to measure the effect This is impossible
Impact evaluation uses large numbers (individuals, communities) to estimate the effect
How is this done? Select one group to receive treatment (contract
alternative, information…) Find a comparison group to serve as
counterfactual (other alternative, no information…)
Use these counterfactual criteria: Treated & comparison groups have identical
initial average characteristics (observed and unobserved)
The only difference is the treatment Therefore the only reason for the difference in
outcomes is due to the treatment (or differential treatment)
How is monitoring different from impact evaluation?The Monitoring
story In 1996, transfer
to school was 20 out of 100 budget allocation
Government started publishing school allocations in newspapers
By 2001, transfers jumped to 80% of budget allocation, a gain of 60 (80-20)
%
AfterBefore
20
80
1996 2001
20
Information
Change=60
Low control
s
High control
s
How is monitoring different from impact evaluation? %
AfterBefore
20
80
1996 2001
20
Information & other
factors
36 Impact =44
The Impact evaluation story
In 1996, a low awareness year, transfers to schools were 20% of budget allocation
After the 1996 PETS were published, there was much public discussion and budgets published in local newspapers
By 2001, transfers in schools close to newspaper outlets increased to 80
Transfers to schools far from newspaper outlets increased to 36
Newspaper information increased transfers by 44 (80-36)
Low control
s
High control
s
How to use Monitoring & Impact Evaluation? Use monitoring to track implementation efficiency (input-output)
INPUTS OUTCOMESOUTPUTS
MONITOR EFFICIENCY
EVALUATE EFFECTIVENESS
$$$
BEHAVIOR
Use impact evaluation to measure effectiveness (output-outcome)
Question types and methods
Descriptive analysis
Causal analysis
Monitoring and process evaluation
Is program being implemented efficiently?
Is program targeting the right population?
Are outcomes moving in the right direction?
Impact Evaluation What was the effect of the program on
outcomes? How would outcomes change under
alternative program designs? Is the program cost-effective?
When would you use M&E and when IE?
Are transfers to localities being delivered as planned?
Does information reduce capture?
What are the trends in public procurement?
Do contractual incentives increase timeliness in delivery of services?
M&E
IE
M&E
IE
Uganda Community-Based Nutrition Failed project
In year 3 communities stopped receiving funds Parliament negative reaction Intervention stopped
…but… Strong impact evaluation results in year 1-2
Children in treatment scored half a standard deviation better than children in the control
Recently, Presidency asked to take a second look at the evaluation: saving the baby?
Why evaluate: babies & bath water
Why Evaluate? Improve quality of programs
Separate institutional performance from quality of intervention
Test alternatives and inform design in real time Increase program effectiveness Answer the “so what” questions
Build government institutions for evidence-based policy-making Plan for implementation of options not solutions Find out what alternatives work best Adopt better way of doing business and
taking decisions
Institutional frameworkPM/Presidency:
Communicate to constituencies
Treasury/Finance:
Allocate budget
Line ministries:
Deliver programs and negotiate
budget
Effects of government
program
BUDGET
SERVICE DELIVERY
CAMPAIGNPROMISES
Accountability
Cost-effectiveness of alternatives and effect of
sector programs
Cost-effectiveness
of different programs
From: Program is a set of activities designed to deliver expected results
Program will either deliver or notTo: Program is menu of alternatives with a learning strategy to find out which work best
Change programs overtime to deliver more results
Shifting Program Paradigm
Shifting Evaluation Paradigm From retrospective, external, independent
evaluation Top down Determine whether program worked or not
To prospective, internal, and operationally driven impact evaluation /externally validated Set program learning agenda bottom up Consider plausible implementation alternatives Test scientifically and adopt best Just-in-time advice to improve effectiveness
of program over time
Operational questions: managing for resultsQuestion design-choices of program
Institutional arrangements, Delivery mechanisms, Packages, Pricing/incentive schemes
Use random trials to test alternativesFocus on short term outcomes
take up rates, use, adoptionFollow up data collection and analysis
3-6-12 months after exposureMeasure impact of alternative
treatments on short term outcomes and identify “best”
Change program to adopt best alternative
Start over
Policy questions: accountability
How much does the program deliver? Is it cost-effective? Use most rigorous method of evaluation
possible Focus on higher level outcomes
educational achievement, health status, income
Measure impact of operation on stated objectives and a metric of common outcomes One, two, three year horizon
Compare with results from other programs
Inform budget process and allocations
Is impact evaluation a one shot analytical product?
This is a technical assistance product to change the way decisions are taken
It is about building a relationshipAdds results-based decision tools to
complement existing sector skillsThe relationship delivers not one but
a series of analytical productsMust provide useful (actionable)
information at each step of the impact evaluation
DIMEDevelopment Impact Evaluation
Objective To build know‐how in implementing agencies and
work with Bank operations to generate operational knowledge
Programmatic Activities Annual workshops for skill development Community of practice for South‐to‐South learning Technical advisory group to assure quality of
analytical work
In-Country Activities Technical support and field coordination through
project cycle
DIME programs
Thank you
email [email protected] www.worldbank.org/dime