This was an interesting study. Researchers dropped 17,000 wallets with money and items in them on streets around the world. Reporting rates are listed at the link, and the overall honesty was somewhat refreshing.
It was interesting that the higher amounts of money in the wallet increased reporting rate in many countries. I'm wondering if that's related to effort. If someone sees a wallet with no, or little money in it, is it too much trouble for them to track down the owner?
I was surprised that China was at the bottom of the list. I would have thought both culture and authoritarianism would have placed them higher, out of fear if not virtue.
https://science.sciencemag.org/content/365/6448/70As an aside, I found it funny that the researchers were worried about crossing various borders with backpacks full of wallets.