This company adopted AI. Here's what happened to its human workers

"Things are changing so fast," says Erik Brynjolfsson, a leading, technology-focused economist based at Stanford University.

Back in 2017, Brynjolfsson published a paper in one of the top academic journals, Science, which outlined the kind of work that he believed AI was capable of doing. It was called "What Can Machine Learning Do? Workforce Implications." Now, Brynjolfsson says, "I have to update that paper dramatically given what's happened in the past year or two."

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A group of economists conducted one of the first empirical studies of "generative AI" at a real-world company. They found it had big effects.