In August 2017 Gapminder commissioned Ipsos MORI to carry out a survey in 12 countries about a range of global issues.
The 12 countries included in this survey are Australia, Belgium, Canada, France, Great Britain, Germany, Hungary, Japan, South Korea, Spain, Sweden, and the United States of America. An international sample of 10,024 adults aged 18-64 in Canada and the US, and aged 16-64 in all other countries, were interviewed between July 25th and August 6th 2017. Approximately 1000+ individuals participated on a country by country basis via the Ipsos Online Panel with the exception of Belgium, Hungary, South Korea and Sweden where each have a sample of approximately 500+.
Weighting has been employed to balance demographics and ensure that the sample’s composition reflects that of the adult population according to the most recent country census data. A survey with an unweighted probability sample of this size would have an estimated margin of error of +/- 3.1 percentage points for a sample of 1,000 and an estimated margin of error of +/- 4.5 percentage points for a 500 sample 19 times out of 20. In all of countries surveyed internet penetration is sufficiently high to think of the samples as representative of the wider population within the age ranges covered.