According to one 2006 study , by dirk krueger of the university of pennsylvania and fabrizio perri of new york university , consumption inequality has barely budged for several decades , despite a sharp upswing in income inequality 根据宾夕法尼亚大学的德克.克鲁格和纽约大学的法比吉奥.皮埃尔于2006年的一份调查显示,几十年来,尽管收入不公平迅速增长,人们的消费不公平并没有多大变化。