No, says a new newspaper past times Raj Chetty et al.:
"We acquaint novel show on trends inwards intergenerational mobility inwards the USA using administrative lucre records. We discovery that percentile rank-based measures of intergenerational mobility bring remained extremely stable for the 1971-1993 nativity cohorts....[C]hildren entering the project marketplace today bring the same chances of moving upwards inwards the income distribution (relative to their parents) every bit children born inwards the 1970s."Sumber https://gregmankiw.blogspot.com/