"There's a reason the authors stopped short of making any social commentary in their study." I think because it would be way out of bounds. Casual commenters such as us have a little space to speculate (unless dang gets fussy), but it'd be too improper for researchers to make assumptions.
One major thing missing in this study is the rural/urban divide. I suggest London is not representative in any way of the rest of the UK, and neither is Manchester the same as Penzance.
Edit: I should note that the authors do indeed go into trying to find cultural correlates, they go right for '% protestant' etc. and make some fairly speculative comments which I would be uncomfortable with because these are all just correlations. Notably, one of the highest 'correlations' is 'latitude' (!), it's not as though being at a certain latitude makes one more civic. Maybe there are other, related, factors, but it's certainly not latitude.
I believe people in China understand very well what paper money is and means, in roughly/ballpark the same terms as Americans.
I could be wrong.
The question is do they store this paper money is wallets? Or is it carried in a pocket? Or do they have full sized binders the money is put in? Or fanny packs? Do they even carry cash anymore?
A 'wallet' in China is the the same thing as a 'wallet' in the USA or Sweden.
Like how women in the US carry purses. I've never been to another country. Do all cultures use purses? If they do is it both genders or only one? I don't know.
I was raised in China and certainly got many of my lost things back growing up. Just because many Chinese folks prefer not to contact the owners directly does not mean they do not use other ways to return lost items :)
this makes it more difficult to get it back than in some of the top rated countries. Do hope to change. But this is not really about civic honesty.