[nezaj]

From one of the author's comments re: Japan

  Japan has a unique system with lots of small police booths (Koban system) where citizens return lost objects. While we found a large number of our wallets listed on official lost and found websites, we were not able to retrieve these wallets as it would have required proof of ownership and identification documents. As a result, we were not able to find out the unique email addresses or the original locations of the wallets and we could not ascertain (among other things) to which experimental condition the wallet belonged. As we were primarily interested in the difference between experimental conditions, we had to exclude Japan from the paper. By contrast, we do not have evidence of similar systematic behavior from other countries.