I think this might be what parent is referring to: https://www.rnz.co.nz/national/programmes/sunday/audio/20187...

Although as far as I can see, the paper has not been peer reviewed yet (but it's also quite old)

Sorry, I suspect sharing will just lead to an argument over perceived insults I don't intend. Consider my original comment a friendly warning. Should you think it's worth following up on, I think you'll find it easy to find evidence. If you don't, that's okay too.