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The ISMIE dependent interviewing experiment. Objectives. To compare dependent and independent interviewing To compare proactive and reactive dependent interviewing
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The ISMIE dependent interviewing experiment Essex Dependent Interviewing Workshop 17/09/2004
Objectives • To compare dependent and independent interviewing • To compare proactive and reactive dependent interviewing • With respect to several sets of questions: current employment, income from employment, activity history, qualifications, sources of income • To assess differences in estimates, but also… • To make direct assessments of measurement error with each form of questioning, by using validation data Essex Dependent Interviewing Workshop 17/09/2004
Sample • UK part of European Community Household Panel Survey (ECHP), “low income supplemental sample” • Selected from 1997 ECHP respondents with characteristics associated with increased likelihood of low household income (elderly, single parents, income support, etc) • 8 previous annual waves (1994-2001) • ISMIE sample consists of 1,163 persons who gave full interviews on 2001 wave • Randomly assigned to 3 groups: INDI, PDI, RDI • Interviewed 1,032 (348 INDI, 340 PDI, 344 RDI) Essex Dependent Interviewing Workshop 17/09/2004
Recall Period • Wave 8 interviews Sep 2001 – Feb 2002 • ISMIE interviews Mar 2003 – May 2003 • Consequently, interval between 13 and 20 months Essex Dependent Interviewing Workshop 17/09/2004
Question Design Example: Industry • INDI: “What does the firm you work for actually make or do (at the place where you work)?” “What is the exact name of your employer?” • PDI: “Last time you said that you were working for <EMPLOYER>? Are you still working for the same employer? If yes: Skip. If no: INDI question. • RDI: INDI question, then If employed at wave 8: “Is that the same employer that you were working for last time we interviewed you, on <INTDATE>, when we recorded your employer as <EMPLOYER>? If not employed at wave 8: Skip to next question. Essex Dependent Interviewing Workshop 17/09/2004
The ISMIE dependent interviewing experiment Essex Dependent Interviewing Workshop 17/09/2004