The Expansion Effect

The Expansion Effect

The Productivity J-Curve

Why we see AI everywhere except in the economic data—and when that will change.

Joseph Logan's avatar
Joseph Logan
Jun 18, 2026
∙ Paid

If productivity increases in the economy and no one measures it, did it happen?

I began this week with three somewhat counterintuitive propositions:

  1. I do not believe there has been any meaningful job displacement by AI.

  2. I do not believe there has been any meaningful job creation by AI.

  3. I do not believe there have been any meaningful productivity gains from …

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