" Out of sheer convenience, the vast majority of experimental studies, which have been conducted by academic researchers in North America, Europe, Israel and Australia, have used their own universities’ undergraduate students as their subjects. As a result, between 2003 and 2007, 96 percent of people studied in such behavioural experiments came from countries that were home to only 12 percent of the world’s population. "

― Kate Raworth , Doughnut Economics: Seven Ways to Think Like a 21st-Century Economist