Long Distance Mobility Survey in Denmark 2001/2002 Presentation at Eurostat meeting in Luxembourg 6 – 7 December 2001

Method used CATI Blaise application Background data (apart from register data) Commuting data Holiday journeys 4+ nights Other private journeys 0+ nights Business journeys 0+ nights

Sampling Frame: Central Population Register Every quarter Update of addresses every month Search for telephone number every month

Interviewing Introduction letter sent 2 days before start of month Interviewing from first day in the month Up to 10 calls during the month Afternoon and evening Monday to Sunday 3 interviewers

Minor revision of CATI in Oct. September survey has lead to revision of CATI system applied Journey information on Destination Day of start Day of return are carried on trip level to support the interviewer Interviewers are supplied with calendar in order to know Easter, Whitsunday, Ascension Day, other bank holidays, weekends etc

Sample 1470 persons 15+ years requested = 125 per month Gross sample: 217 persons per month Missing telephone number: 25- 30 persons No contact: 45- 50 persons Usable contacts: 125 – 130 persons Don’t want to participate: 10 persons Other: 10 persons Response rate: 58 % (gross); 66 % (net)

Non response survey Postal survey Summary questionnaire to persons Without known telephone number Not reached 78 persons in September; 28 replies (36 %) 69 in October; 21 replies (30 %)

Validation survey 7 persons selected Not yet lead to corrections of reported data

Coding Geographic coding Files for Dateline will take place in batch jobs on a monthly basis Files for Dateline September in the tube