What do the U.S., Switzerland, China and the U.K have in common?

Citizens more likely to sacrifice for the common good (solve the free riding dilemma):

Among students in the U.S., Switzerland, China and the U.K., those identified as freeloaders most often took their punishment as a spur to contribute more generously. But in Oman, Saudi Arabia, Turkey, Greece and Russia, the freeloaders more often struck back, retaliating against those who punished them, even against those who had given most to everyone's benefit. It was akin to rapping the knuckles of the helping hand.