"Krugman has always had a nerdy obsession with puns. (He is very proud of a line in one of his textbooks: “Efforts to negotiate a resolution to Europe’s banana split had proved fruitless.”) He also likes costumes. Once, he and Wells gave a Halloween party where the theme was economics topics—two guests came as Asian tigers, several came as hedge funds, one woman came as capital, dressed as a column."

How Paul Krugman found politics : The New Yorker