科学美国人60秒 SSS 2014-10-14（在线收听）

 Americans... the graver section on average were earning more. Researchers wondering how the increased income affects the charitable giving. So they..to LS data from 2006 and 2012. They broke the data down by state county metropolitan area and zip code. The results 180 billion .. proper dollars in 2012 covered about 80% of individual donations to charity. Investigators found than even the wealthier Americans, to find those making more than 200,000$ a year, were making more in 2012 than they did in 2006. They actually decreased their donations by an average of almost 5%. Middle and lower income Americans, to find these people making less than 100,000$ a year increased their charitable giving by almost the same nearly 5%. These increase came despite the facts that the group's earning less on average than they had in 2006. The finding in the...even though the wealthier Americans decreased their donations by percentages. They still give more than 4.5 billion$ more in 2012 than they did in 2006. That's because the wealthiest Americans capture nearly all of the recession recovery. More than a trillion dollar better than they did in 6 years earlier in the rare case of rising tied linking only samples.