Slack's embrace of a ‘fail fast’ approach helped it become the world's dominant intra-office messaging app. AP Photo/Kiichiro SatoAcross the business world, companies often double down on struggling ideas, retreating only after clear evidence shows they won’t work.

Beneath the grand claims and vast capital spending, AI is delivering weak productivity, mounting losses, and growing financial strain. If the boom cannot generate profits, jobs, or durable gains, how much longer can the bubble hold?

We model central bank communication when there is disagreement between the markets and the central bank about the central bank’s confidence surrounding its point forecast. We show that such a disagreement leads the markets to misunderstand a given announcement, so that the markets either over- or underreact to the bank’s announcement. Communicating only a part of the central bank’s information set is a way to correct the markets’ over- or underreaction.

Whether in sports, music or business, all-women teams earn less. Minnesota Lynx guard Renee Montgomery drives between Indiana Fever guards Layshia Clarendon, left, and Shenise Johnson at a WNBA game in Minneapolis.