Publication:
Replicating Replication : Due Diligence in Roodman and Morduch’s Replication of Pitt and Khandker (1998)

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dc.contributor.authorPitt, Mark M.
dc.contributor.authorKhandker, Shahidur R.
dc.date.accessioned2013-01-04T21:41:09Z
dc.date.available2013-01-04T21:41:09Z
dc.date.issued2012-11
dc.description.abstract"The Impact of Microcredit on the Poor in Bangladesh: Revisiting the Evidence," by David Roodman and Jonathan Morduch (2011) is the most recent of a sequence of papers and postings that seeks to refute the findings of the Pitt and Khandker (1998) article "The Impact of Group-Based Credit on Poor Households in Bangladesh: Does the Gender of Participants Matter?" that microcredit for women had significant, favorable effects on poverty reduction. In this paper the authors show that these latest Roodman and Morduch claims are based on seriously flawed econometric methods and theory and a lack of due diligence in formulating models and interpreting output from packaged software. On the basis of Roodman and Morduch's preferred two-stage least squares regression, an alternative calculation of the standard errors would lead one to conclude that the problem with Pitt and Khandker is that they underestimate the positive and statistically significant effect of women's credit on household consumption. As in their previous efforts, the methods of Roodman and Morduch are shown to bias the findings in the direction of rejecting the results of Pitt and Khandker. We also further examine two aspects of our instrumental variable approach that have been attacked by Roodman and Morduch. The first is the validity of the exclusion restrictions underlying the use of interactions between program choice and the set of exogenous variables (including the village fixed effects) as instruments. The second is the application of the "one-half acre" program eligibility rule. The authors show that identification does not require both of these, and present new results dropping each assumption in turn. The results originally reported in the Pitt and Khandker paper hold up extremely well in this new analysis.en
dc.identifierhttp://documents.worldbank.org/curated/en/2012/11/16985792/replicating-replication-due-diligence-roodman-morduchs-replication-pitt-khandker-1998
dc.identifier.doi10.1596/1813-9450-6273
dc.identifier.urihttps://hdl.handle.net/10986/12111
dc.languageEnglish
dc.language.isoen_US
dc.publisherWorld Bank, Washington, DC
dc.relation.ispartofseriesPolicy Research Working Paper; No. 6273
dc.rightsCC BY 3.0 IGO
dc.rights.holderWorld Bank
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/igo/
dc.subjectAGRICULTURE
dc.subjectALGEBRA
dc.subjectBIASES
dc.subjectCALCULATION
dc.subjectCOEFFICIENTS
dc.subjectCONSISTENT ESTIMATES
dc.subjectCONSTANT TERM
dc.subjectCONSUMPTION FUNCTION
dc.subjectCOVARIANCE
dc.subjectCRITICAL VALUES
dc.subjectDATA MATRICES
dc.subjectDEPENDENT VARIABLE
dc.subjectDEVELOPMENT ECONOMICS
dc.subjectDEVELOPMENT POLICY
dc.subjectDEVELOPMENT RESEARCH
dc.subjectDUMMY VARIABLE
dc.subjectDUMMY VARIABLES
dc.subjectECONOMETRIC ANALYSES
dc.subjectECONOMETRIC ANALYSIS
dc.subjectECONOMETRIC METHODS
dc.subjectECONOMETRIC MODEL
dc.subjectECONOMETRIC MODELING
dc.subjectECONOMETRIC THEORY
dc.subjectECONOMETRICS
dc.subjectENDOGENOUS VARIABLES
dc.subjectEQUATIONS
dc.subjectERROR
dc.subjectERROR TERM
dc.subjectESTIMATION COMMANDS
dc.subjectESTIMATORS
dc.subjectEXOGENOUS REGRESSORS
dc.subjectEXOGENOUS VARIABLES
dc.subjectEXPERIMENTATION
dc.subjectF-TEST
dc.subjectFINITE SAMPLES
dc.subjectFIXED EFFECTS
dc.subjectHYPOTHESIS TESTING
dc.subjectINDEPENDENT VARIABLE
dc.subjectINDEPENDENT VARIABLES
dc.subjectINSTRUMENTAL VARIABLES
dc.subjectINSTRUMENTAL VARIABLES REGRESSION
dc.subjectJOURNAL OF ECONOMETRICS
dc.subjectKURTOSIS
dc.subjectLARGE NUMBER
dc.subjectLEAST SQUARES REGRESSION
dc.subjectLOG-LIKELIHOOD FUNCTION
dc.subjectMATHEMATICS
dc.subjectMATRICES
dc.subjectMATRIX
dc.subjectMAXIMUM LIKELIHOOD
dc.subjectMAXIMUM LIKELIHOOD ESTIMATION
dc.subjectMAXIMUM LIKELIHOOD METHOD
dc.subjectMEAN VALUE
dc.subjectMOMENT CONDITIONS
dc.subjectNONLINEARITY
dc.subjectNORMAL DISTRIBUTION
dc.subject0 HYPOTHESIS
dc.subjectNUMBER OF OBSERVATIONS
dc.subjectOUTLIERS
dc.subjectPANEL DATA
dc.subjectPARAMETER VECTOR
dc.subjectPOLITICAL ECONOMY
dc.subjectPOSITIVE EFFECTS
dc.subjectPRECISION
dc.subjectPREDICTION
dc.subjectPROBABILITIES
dc.subjectPROBABILITY
dc.subjectPROBABILITY VALUE
dc.subjectRANDOM SAMPLING
dc.subjectRANDOM VARIABLE
dc.subjectRANDOM VARIABLES
dc.subjectREASONING
dc.subjectREGRESSION EQUATION
dc.subjectREGRESSION MODEL
dc.subjectRESEARCH PAPERS
dc.subjectRESEARCH REPORT
dc.subjectRESEARCH WORKING PAPERS
dc.subjectSAMPLE DESIGN
dc.subjectSAMPLE SIZE
dc.subjectSET OF VARIABLES
dc.subjectSIMULATION
dc.subjectSIMULATIONS
dc.subjectSIMULTANEOUS EQUATIONS
dc.subjectSKEWNESS
dc.subjectSLOPE COEFFICIENTS
dc.subjectSTANDARD DEVIATION
dc.subjectSTANDARD DEVIATIONS
dc.subjectSTANDARD ERRORS
dc.subjectSTATA
dc.subjectSTATA CODE
dc.subjectSTATISTICAL THEORY
dc.subjectSTATISTICALLY SIGNIFICANT EFFECT
dc.subjectT-RATIO
dc.subjectT-RATIOS
dc.subjectTEST STATISTIC
dc.subjectTEST STATISTICS
dc.subjectVALIDITY
dc.subjectWEALTH
dc.titleReplicating Replication : Due Diligence in Roodman and Morduch’s Replication of Pitt and Khandker (1998)en
dspace.entity.typePublication
okr.crossref.titleReplicating Replication: Due Diligence in Roodman and Morduch's Replication of Pitt and Khandker (1998)
okr.date.disclosure2012-11-01
okr.date.doiregistration2025-04-10T12:13:21.656828Z
okr.doctypePublications & Research::Policy Research Working Paper
okr.doctypePublications & Research
okr.docurlhttp://documents.worldbank.org/curated/en/2012/11/16985792/replicating-replication-due-diligence-roodman-morduchs-replication-pitt-khandker-1998
okr.globalpracticeMacroeconomics and Fiscal Management
okr.globalpracticeEducation
okr.globalpracticeTransport and ICT
okr.guid175271468153862585
okr.identifier.doi10.1596/1813-9450-6273
okr.identifier.externaldocumentum000158349_20121121125524
okr.identifier.internaldocumentum16985792
okr.identifier.reportWPS6273
okr.language.supporteden
okr.sectorFinance :: Micro- and SME finance
okr.themeRural development :: Rural non-farm income generation
okr.themeRural development :: Rural policies and institutions
okr.topicScience Education::Statistical and Mathematical Sciences
okr.topicMacroeconomics and Economic Growth::Economic Theory & Research
okr.topicMacroeconomics and Economic Growth::Econometrics
relation.isAuthorOfPublication1dc630c1-c19d-5c71-8d7c-1299435d0456
relation.isAuthorOfPublication.latestForDiscovery1dc630c1-c19d-5c71-8d7c-1299435d0456
relation.isSeriesOfPublication26e071dc-b0bf-409c-b982-df2970295c87
relation.isSeriesOfPublication.latestForDiscovery26e071dc-b0bf-409c-b982-df2970295c87
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