Chapter 6 Italy
نویسنده
چکیده
CATI has been widely used in Italian surveys since the 1980s. As a matter of fact telephone interviewing, compared to traditional face-to-face data collection methods, allows to save time and money. It also offers further advantages: better control over the quality of the interview through a centralized facility, continuous monitoring and supervision, and the opportunity to include experiment-like variables in the survey (Groves et al. 1988, Piazza and Sniderman 1998). Institutional data producers, academic researchers and companies in the market research and polls industries have been taking advantage of all these opportunities. Sampling designs adopted in phone surveys and polls range from nonprobabilistic quota sampling to more valuable probabilistic sampling approaches, similarly to what happens in face-to-face surveys. Voting lists and population registers represent the typical frames for face-toface surveys. The former are publicly available and cover all Italian citizens having political rights while institutional data collectors may use the latter in order to cover foreign residents, too. Public phone directories have traditionally been used for the same purpose in landline phone surveys on the general population. In this last case, once a household owning a sampled telephone number has been contacted, through randomization techniques such as the nearest birthday method or the Kish grid, a single individual may be selected for interview within the household. Dedicated phone directories – clients’ records, for instance – may be used for specific sub-populations as in the case of customer surveys, instead of the white pages. To the best of our knowledge, the former also represent the only adopted sampling frame for mobile phone surveys and polls. The setting up of a comprehensive phone directory (for which the Italian acronym is DBU) – listing both landline and mobile phones, irrespective of the different operators – has been promoted by the Authority for Communications in 2002. Various types of printed
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