Timing and Duration of Exposure in Evaluations of Social Programs

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dc.creatorKing , Elizabeth M.
dc.creatorBehrman, Jere R.
dc.date2012-05-31T21:28:35Z
dc.date2012-05-31T21:28:35Z
dc.date2008-08
dc.date.accessioned2026-07-01T01:23:27Z
dc.descriptionImpact evaluations aim to measure the outcomes that can be attributed to a specific policy or intervention. Although there have been excellent reviews of the different methods that an evaluator can choose in order to estimate impact, there has not been sufficient attention given to questions related to timing: How long after a program has begun should one wait before evaluating it? How long should treatment groups be exposed to a program before they can be expected to benefit from it? Are there important time patterns in a program's impact? Many impact evaluations assume that interventions occur at specified launch dates and produce equal and constant changes in conditions among eligible beneficiary groups; but there are many reasons why this generally is not the case. This paper examines the evaluation issues related to timing and discusses the sources of variation in the duration of exposure within programs and their implications for impact estimates. It reviews the evidence from careful evaluations of programs (with a focus on developing countries) on the ways that duration affects impacts.
dc.formatapplication/pdf
dc.formattext/plain
dc.identifierhttp://documents.worldbank.org/curated/en/2008/08/9737166/timing-duration-exposure-evaluations-social-programs
dc.identifierhttps://hdl.handle.net/10986/6812
dc.identifierhttps://doi.org/10.1596/1813-9450-4686
dc.identifier.urihttp://hdl.handle.net/123456789/417657
dc.languageEnglish
dc.publisherWorld Bank, Washington, DC
dc.relationPolicy Research Working Paper No. 4686
dc.rightsCC BY 3.0 IGO
dc.rightshttp://creativecommons.org/licenses/by/3.0/igo/
dc.rightsWorld Bank
dc.subjectACCUMULATION OF KNOWLEDGE
dc.subjectAGE RANGES
dc.subjectAGED
dc.subjectAUTONOMOUS SCHOOLS PROGRAM
dc.subjectBENEFICIARIES
dc.subjectBENEFITS FOR CHILDREN
dc.subjectCHILD DEVELOPMENT
dc.subjectCHILD NUTRITION
dc.subjectCLINICS
dc.subjectCOGNITIVE DEVELOPMENT
dc.subjectCOGNITIVE STIMULATION
dc.subjectCOLLABORATION
dc.subjectCOMMUNITY PARTICIPATION
dc.subjectCOMPARATIVE EDUCATION
dc.subjectCOMPLETION RATES
dc.subjectCOMPREHENSIVE EARLY CHILDHOOD DEVELOPMENT
dc.subjectCONTROL GROUPS
dc.subjectCOUNTERFACTUAL
dc.subjectCRIME
dc.subjectCULTURAL CHANGE
dc.subjectDROPOUT RATES
dc.subjectEARLY CHILDHOOD
dc.subjectEARLY CHILDHOOD DEVELOPMENT
dc.subjectEDUCATION REFORMS
dc.subjectEDUCATIONAL ATTAINMENT
dc.subjectENROLLMENT
dc.subjectENROLLMENT RATE
dc.subjectEVALUATION METHODS
dc.subjectEVALUATION OF EDUCATION
dc.subjectEXERCISES
dc.subjectFAMILIES
dc.subjectFAMILY PLANNING
dc.subjectFORMAL TRAINING
dc.subjectGIRLS
dc.subjectHEAD START
dc.subjectHEALTH CARE
dc.subjectHEALTH INTERVENTIONS
dc.subjectHEALTH OUTCOMES
dc.subjectHEALTH SERVICES
dc.subjectHIGH SCHOOL
dc.subjectHOSPITALS
dc.subjectHUMAN DEVELOPMENT
dc.subjectHYGIENE
dc.subjectIMMUNIZATION
dc.subjectIMPACT ASSESSMENT
dc.subjectIMPACT EVALUATION
dc.subjectINCOME
dc.subjectINFORMATION CAMPAIGNS
dc.subjectINSTRUCTION
dc.subjectINSTRUCTIONAL MATERIALS
dc.subjectINTERVENTION
dc.subjectINTERVENTIONS
dc.subjectLANGUAGE DEVELOPMENT
dc.subjectLEARNING
dc.subjectLEVEL OF ACHIEVEMENT
dc.subjectLITERACY
dc.subjectLONGITUDINAL DATA
dc.subjectMASS MEDIA
dc.subjectMEDICINES
dc.subjectMENTAL DEVELOPMENT
dc.subjectMIGRATION
dc.subjectMONITORING DATA
dc.subjectNGO
dc.subjectNUMERACY
dc.subjectNUTRITION
dc.subjectNUTRITION PROGRAM
dc.subjectNUTRITIONAL INTAKE
dc.subjectNUTRITIONAL SUPPLEMENTS
dc.subjectOLDER CHILDREN
dc.subjectPOPULATION STUDIES
dc.subjectPREGNANCY
dc.subjectPRESCHOOL EDUCATION
dc.subjectPRIMARY SCHOOL
dc.subjectPRIMARY SCHOOL AGE
dc.subjectPRIMARY SCHOOL COMPLETION
dc.subjectPRIMARY SCHOOL FEEDING PROGRAMS
dc.subjectPRIMARY SCHOOLS
dc.subjectPRIMARY-SCHOOL
dc.subjectPRIMARY-SCHOOL-AGE
dc.subjectPRIMARY-SCHOOL-AGE CHILDREN
dc.subjectPRIVATE SCHOOLING
dc.subjectPROGRAM IMPACTS
dc.subjectPROGRAM IMPLEMENTATION
dc.subjectPROJECT EVALUATION
dc.subjectPUBLIC SCHOOLS
dc.subjectQUALITATIVE ANALYSIS
dc.subjectREADING
dc.subjectSCHOOL AUTONOMY
dc.subjectSCHOOL CONSTRUCTION
dc.subjectSCHOOL DIRECTORS
dc.subjectSCHOOL ENROLLMENT
dc.subjectSCHOOL FEEDING
dc.subjectSCHOOL IMPROVEMENT
dc.subjectSCHOOL IMPROVEMENT PLAN
dc.subjectSCHOOL IMPROVEMENT PROGRAM
dc.subjectSCHOOL MANAGEMENT
dc.subjectSCHOOL PERSONNEL
dc.subjectSCHOOL QUALITY
dc.subjectSCHOOL YEAR
dc.subjectSCHOOL-AGE CHILDREN
dc.subjectSCHOOLING
dc.subjectSCHOOLS
dc.subjectSECONDARY EDUCATION
dc.subjectSECONDARY SCHOOL
dc.subjectSELECTION BIAS
dc.subjectSIBLINGS
dc.subjectSKILL DEVELOPMENT
dc.subjectSOCIAL LEARNING
dc.subjectSOCIAL NETWORKS
dc.subjectSOCIAL POLICIES
dc.subjectSOCIAL SERVICES
dc.subjectSTATISTICAL ANALYSIS
dc.subjectTARGETING
dc.subjectTEACHER
dc.subjectTEACHER TRAINING
dc.subjectTEACHERS
dc.subjectTECHNICAL QUALITY
dc.subjectTEXTBOOKS
dc.subjectTRAINEES
dc.subjectTRAINING ACTIVITIES
dc.subjectTRAINING PROGRAMS
dc.subjectTREATMENT EFFECTS
dc.subjectTREATMENT GROUPS
dc.subjectVACCINATION
dc.subjectVILLAGE EDUCATION
dc.subjectVILLAGE EDUCATION COMMITTEE
dc.subjectWORKERS
dc.titleTiming and Duration of Exposure in Evaluations of Social Programs

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