. . "Ke, lu ge man (mei)" . "1953" . "Krugman Paul R. Kelugeman" . "(美) Krugman Paul R. 克鲁格曼" . "克鲁格曼 (美)" . "Kelugeman" . "(mei) Krugman Paul R. Ke" . . "克鲁格曼" . "Ke, lu ge man Krugman, Paul R." . "Krugman" . "Krugman Paul R. 克鲁格曼" . "Kelugeman (Krugman, Paul R. )" . "Ke" . "Paul R." . "克鲁格曼 (Krugman, Paul R. )" . "克鲁格曼 Krugman, Paul R." .