-- Italy -- Portugal -- Part II Sampling for Telephone Surveys: Who can be contacted by phone? Lessons from Switzerland … -- Sampling Frames for Telephone Surveys in Europe -- Mobile- and Landline-Onlys in Dual-Frame-Approaches: Effects on Sample … Introductions in Telephone Surveys -- Preference for Mobile Interview Surveys? Interplay of Costs, Errors and Biases -- Fieldwork …