Lacker, Jeffrey Malcolm. "Message from the President : Human Capital and the American Dream," in Federal Reserve Bank of Richmond. "2012 Annual Report : Land of Opportunity? Economic Mobility in the United States," Annual Report of the Federal Reserve Bank of Richmond (as of December 31, 2012) : 4-5. https://fraser.stlouisfed.org/title/471/item/476919/toc/503182 , accessed on July 1, 2022.