AI is only "part" of high U.S. productivity growth, says Stripe economist

AI appears to improve workers' efficiency in a number of sectors. The U.S. has experienced a surge in economy-wide productivity in the last couple of years. But the former isn't necessarily driving the latter. The big picture: Companies are achieving more output per person-hour of labor because they are making better use of existing capital, a provocative new analysis finds — not, at the moment at least, by making major use of AI. AI advances may be generating substantial micro-level gains in…