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🔮 ROI in the age of generative AI

AI revolution, meet the credibility revolution

Andrew McAfee
Mar 19, 2025
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Hi all, it’s Azeem.

There’s some evidence suggesting that AI is making workers more productive. But what if we’re getting it all wrong?

Just because engineers who use AI seem more productive doesn’t mean AI made them more productive. It might just be that the best engineers are the ones most eager to adopt new tools.

This is an old problem in economics. For decades, researchers struggled to separate true cause-and-effect from mere correlation. Then came the “credibility revolution,” a shift in how economists think about causality.

Andrew McAfee
has unpacked this concept to show how advanced statistics can distinguish genuine productivity gains from selection bias. It’s a rigorous, eye-opening approach that underlies Workhelix, the startup he cofounded with
Erik Brynjolfsson
and Daniel Rock.

This essay first appeared on Andrew’s Substack, The Geek Way (which is also the title of his most recent book), and he kindly agreed to share it with Exponential View. I hope it resonates with you all as it did with me.

Read on!

A…

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A guest post by
Andrew McAfee
MIT scientist curious about how tech progress changes the world.
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