In the 1990s, Roth applied it to the market for allocating US student doctors to hospitals. He developed a new algorithm that was adopted by the National Resident Matching Program, which helps match resident doctors with the right hospitals.
紧接着地球研究所上一年的榜单,整个全球调查跨越2010到2012。尽管“在过去的五年间,整个世界变得更快乐,更慷慨了一点,” 但在另一些国家,由于经济或政治上的动荡,人民的幸福感却大幅降低。