Presentation on theme: "Sources of Measurement Errors in Business Surveys"— Presentation transcript:
1Sources of Measurement Errors in Business Surveys Mojca Bavdaz
2Outline Measurement errors & their sources. Empirical study. Sources of measurement errors redefined.Implications.
3Measurement errors ‘Theoretical’ definition of a measurement error: ‘deviation’ of the observed survey value from the true value (Groves, 1991);‘difference’ or ‘discrepancy’ between the observed survey value and the true value (Hansen et al., 1951; Sukhatme and Sukhatme, 1970).‘Practical’ definition of a measurement error:observational gap between the ideal measurement and the response obtained (Groves et al., 2004);error which occurs at the time of data collection (Biemer and Lyberg, 2003).
4Sources of measurement errors (1) In household surveys (e.g. Groves, 1989):respondent;interviewer;instrument (the survey questionnaire);mode of data collection.
5Sources of measurement errors (2) In business surveys, the addition of the fifth source:records (Ponikowski, Meily, 1989);information system (Biemer, Fecso, 1995; Biemer, Lyberg, 2003);organization (O'Brien, 2000).
6Empirical study Business survey under study: Aim: Research methods: Quarterly Business Survey on Trade (SORS).Aim:examination of actual response process.Research methods:in-depth interview;observation.Sample size (n=28).Challenges of implementation.
7Three-dimensional model of business survey response
8Sources of measurement error redefined Existing sourcesIdentified sourcesRespondent→ +Business participantsInterviewersSurvey staffSurvey questionnaire (Survey instrument)→Survey instrumentMode of data collectionSurvey characteristicsRecords/Information system/OrganizationOrganizational contextINTERACTIONS!
9Implications Improved tools: Three-dimensional model for comprehensive & systematic analysis of response process in business surveys.Redefined sources of measurement errors for development of approaches to measurement error prevention & reduction.
10Implications: Example 1 Self-administered business survey.No interviewer.But really no survey staff involved?One-time & rare contacts make huge impact.Training of (all) survey staff.
11Implications: Example 2 Recurring business survey.No source of measurement error.But really no impact of recurrence?Learning curve effect & routine.Support & verification of first-time questionnaire completion (at business & respondent level).
12Future research More research on specific aspects: comprehension of economic concepts;role of business participants & survey staff;circulation of survey instrument;impact of ‘soft’ issues;...Quantification through experiments.Generalization to non-business organizational surveys.
13Sources of Measurement Errors in Business Surveys Mojca Bavdaz