https://www.washingtonpost.com/business/2019/04/26/rich-guys-are-most-likely-have-no-idea-what-theyre-talking-about-study-finds/
http://ftp.iza.org/dp12282.pdf
In the study, they asked participants about their knowledge of 16 topics on a five point scale. But 3 of the topics were fictitious.
Those more prone to claiming knowledge about the fictitious topics were:
- In Canada and the US, compared to other English speaking places (lowest tendency in Scotland, Northern Ireland, and Ireland).
- Male (though the gender gap was less in the US and Canada).
- High SES (though the SES gap was less in the US, Canada, and England).
- Immigrant (though the immigrant/non-immigrant gap was almost none in the US and small in Australia and Canada).