Mixed mode data collection in official surveys Nino

Mixed mode data collection in official surveys Nino Zajc: nino. zajc@gov. si Mojca Noč Razinger: mojca. noc@gov. si NTTS 2017; Brussels, 16 th March

Content • • • Mixed modes classifications Web surveys in mixed modes Data collection at SURS Mixed mode results To think about it…

Mixed modes € TSE Minimization of costs Minimization of survey errors

Don Dillman classification Different data collection methods for different samples Different data collection methods in different waves of panel survey 1 st wave Different methods for different parts of the questionnaire 1 st part Different methods to collect data from different populations (international surveys) Mixed modes for communication between interviewers and respondents in the different phases of the research process 2 nd wave 2 nd part

de Leeuw classification Mixed mode in contact phase • Announcement mode is different from the method of data collection • Recruitment/Screening/Selection in mode different from the method of data collection Mixed mode in phase of data collection • for different units of the sample at one point in time and with the same questionnaire. • for different parts of the questionnaire for all units of the sample at one time point and with the same questionnaire • at different time points for the units in the sample (panel) • at different time points on different samples (units) Mixed modes in follow up phase • Reminder in different mode from data collection mode Zajc (2011): Other possibilities of mixed modes • • for survey announcement for different sample units for follow up for different sample units concurrent data collection on units from different sample frames use of different methods of screening questionnaire in the initial stage of contacting

Web surveys in mixed modes • Web survey as method of data collection, different method for contact • Web survey as one of the methods of data collection • Web survey as one method in panel survey

Data collection at SURS Enterprises Persons and households TDM (Tailored Design Method)

Mixed mode results Enterprises - Reporting of enterprises - Concurrent methods (WEB and PAPI) Example of survey on services producer price indices, 2016, 2017 Recieved questionnaires 100% 2016 only paper 90% 80% 74% 70% 64% 2017 combination of web and paper 60% 50% 40% 2017 web only 30% 20% 10% 0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Days

Mixed mode results Individuals and households • • Coverage and response issues Sequential design Web response rates by segment of population with and without defined telephone number. (4 ry ia rc ar y te ye ye , 3 (2 rs ec on d y da r on Web (without tel) up pe ec rs pe Status ar ar ba s ac in er ot h up Age s) s) ic e tiv es tir e re en ts d st ud m pl o ye ed un e em pl oy 65 + 4 -6 50 9 -4 30 16 -2 9 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Education Web (with tel)

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