Blaming Paul Krugman for doing something he hasn’t done! Handelsblatt refers to trade or dealing. Wirtschaft is an interesting word because, while the original Greek for economy means household management, the “Wirt” is more a host of an establishment along the road–i.e. the management has already moved out of the house.
Remember “Wirtschaftswunder”? Talk about self-congratulatory enterprise. Germans are very proud of their enterprise, even as they go off on vacation for a month. But, in a sense, they’re right because when they vacation they rely on being hosted and expect to pay.