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AADAPT Workshop South Asia Goa, December 17-21, 2009 Maria Isabel Beltran 1
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2 For evaluation purposes: Administrative data Surveys our focus, we can complement with other sources of information ▪ Household ▪ Plot ▪ Associations ▪ Community Census and other country surveys
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3 Who collects the data? 2 main cases: The ministry ▪ Hiring of enumerators? Who are they going to be? ▪ People inside the project have incentives to present a better or worse picture for their areas ▪ A lot of effort to follow the process An agency (statistical office or private firm) ▪ OK, this is the type of work they do, but STILL A LOT OF EFFORT is needed to ensure quality (TORs, sample, questionnaire, training, supervision)
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4 Questionnaire design Training Pilot test (and re-training) Field work Supervision Data entry & data cleaning
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5 Who defines it? YOU (the IE team, not the firm) Purpose of survey? Define: respondents, indicators, level, modules. Time & quantity trade off Internal consistency Omission of key issues & skip patterns Clear and explicit questions for all circumstances Avoid open questions (pre-code) / recall period Respondent burden, sensitive issues last
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Often underestimated part of the process. Training reduce variability in data collection Pilot ensures the questionnaire is collecting all information needed to answer questions, all correct information, flows and logic of the questionnaire. Test the instruments cover all conceivable situations Involve the enumerators in the project the importance of the data collected.
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8 Almost always, it is better if organized in groups of enumerators (2-3) Time Vs. quality Have a clear field work plan and division of responsibilities among the group Daily targets Gambia: Enumerator 1Enumerator 2Enumerator 3 Talks to head teacherChildren, math test Classroom observation Head teacher question. Children, reading testTeacher tests Oral tests
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9 Supervision protocol, 1 per 2 teams? Have a supervision strategy: 10% of the sample, 100% ? Only non valid responses? Use an independent firm or team; that has received the training Supervise the supervisors
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10 No need to wait for data collection to finish to start data entry. Make corrections while the data is still being collected. (Missing values, inaccuracies) Integrated concurrent data entry Vs. Concurrent Centralized data entry Vs. Computer assisted interviews Data entry: ONE TIME NOT ENOUGH double entry at the same time, one after the other, one with supervision, … etc If not planned… data cleaning = long & frustrating Data is lost, quality decreases (decisions not documented)
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11 Integrate the data collection and data entry. Timely data Feedback on field work on real time Early detection of errors (like lack of uniform criteria) The Medical Advice, Quality and Absenteeism in Rural India project of the Center for Policy Research, New Delhi
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3 separate firms: data collection, supervision, data entry Define all possible error per questions and program them type0: No error type1: ID error type2: Formattin g error type3: entered skip code but not skipped type4: skipped but no skip code type5: cross check error type6: header ID does not match page 1 type7: blank instead of -99 type8: one digit instead of two Total s1q1855000000000 s1q10838017000000 s1q11831024000000 s1q12828027000000 s1q13855000000000 s1q14852300000003 s1q15854010000001
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14 Relevant data Reliable data Data that is ready when needed… ON TIME, to answer operational and policy questions. Need to have staff dedicated to the project in all phases (design, preparation, implementation, dataset documentation & validation) field coordinator.
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