Samples of 1,000 to 2,000 cases were drawn from the
population of each country's largest city. In a few countries, the
surveys covered several cities by random dialing. In some countries,
there was an additional sample of 200 cases from rural areas, or a
national sample was taken. Sampling was generally hierarchical. It
began with identifying administrative areas within the city, followed
by a step-by-step procedure aiming at identifying areas, streets,
blocks, households, and, finally, household members aged 16 and
over. No substitution of the selected respondent was allowed. There
were some exceptions to this procedure. In Finland, a random selection
of individuals was drawn from the population register. In Northern
Ireland and some rural parts of Spain, telephone penetration was low
and interviews were taken face-to-face with some computer assistance.
Persons aged 16 and over living in Albania, Argentina,
Australia, Azerbaijan, Belarus, Belgium, Botswana, Bulgaria, Cambodia,
Canada, Catalonia, Colombia, Croatia, Czech Republic, Denmark, England
and Wales, Estonia, Finland, France, Georgia, Hungary, Latvia,
Lesotho, Lithuania, Mongolia, Mozambique, Namibia, Nigeria,
Netherlands, Northern Ireland, Panama, Philippines, Poland, Portugal,
Republic of Korea, Romania, Russia, Scotland, Slovenia, South Africa,
Swaziland, Sweden, Switzerland, Uganda, Ukraine, the United States,
and Zambia.
computer-assisted telephone interviews and personal
interviews
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