Economists are outdoing each other with ever more curious instruments, ranging from lethal mosquitoes to heirless maharajahs, or, most recently, wind speeds and sea currents.

• 经济学家们正致力于使用更加稀奇的工具来斗法，这些工具从致命蚊子到无嗣的印度土邦主，或是近期的风速、洋流等无所不包。