Those in richer countries tend to be more satisfied with their lives, according to a new Pew Global report that examines life satisfaction across different countries. The report found that people in advanced economies still report higher levels of well-being, but that middle-income countries have closed the gap since 2007. The trend line for the data also shows that relatively small gains in income make a big difference in well-being at the bottom end of the income scale, but that gains quickly level off.