托马斯·皮克提（Thomas Piketty）的新著《二十一世纪的资本主义 》 （ Capital in the Twenty-First Century）指出，在过去四十年中，发达经济体的累积财富增长相对要快于收入。
As Thomas Piketty’s recent book Capital in the Twenty-First Century shows, accumulated wealth has grown rapidly relative to income across the advanced economies over the last 40 years.