Half of u. s.consumer spending came from the top 20 % of earners in 2000 , according to economists dean maki and michael palumbo .

据经济学家马奇（deanmaki）和帕隆博（michaelpalumbo）估计，2000年美国一半的消费开支来自占总人口20%的富人。

' We think the main risk to the economy is rising commodity prices and their effect on consumer spending , ' said dean maki , chief u. s.economist at barclays capital .

巴克莱资本的首席美国经济学家马奇（deanmaki）说，我们认为美国经济面临的主要风险是大宗商品价格不断上涨及其对消费者支出的影响。