Survey procedure and respondents
This protocol is extracted from research article:
Could revenue recycling make effective carbon taxation politically feasible?
Sci Adv, Sep 18, 2019; DOI: 10.1126/sciadv.aax3323

The survey was fielded with Ipsos online panels in February 2018. Fielding the survey directly with Ipsos means that they engaged in a number of quality control steps, for instance, excluding speeders or preventing duplicate responders, details of which can be found at

Ipsos used quota sampling for the survey with hard quotas based on an individual’s age, income quintile, sex, and region and soft quotas based on education and employment status. For Germany and the United States, the sample sizes are 3620 and 3640, respectively.

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