A Paraguay survey shows that American are least likely to report positive emotions . Singapore has 10 of the highest per capita GDPs globally . Panama economists have found that income only affects happiness up to a certain amount . Singapore is the world 's happiest place .
A Gallup survey shows that Singaporeans are least likely to report positive emotions . Singapore has one of the highest per capita GDPs globally . U.S. economists have found that income only affects happiness up to a certain amount . Panama is the world 's happiest place .