Sustaining Productivity After Full Deployment

Observed productivity spikes (e.g., U.S. labor productivity +4.9% in a quarter) are promising, but keeping growth going after labor and capital hit near‑capacity requires not just inventions but large‑scale re‑application of technologies across the economy. Artificial intelligence is singled out as a candidate technology, but the policy and organizational challenge is how to diffuse and integrate it where conventional factor inputs are already fully used. — If true, this reframes debates about growth from 'how much investment' to 'how to reorganize and regulate the economy so new technologies (especially AI) raise output per worker', affecting labor policy, industrial strategy, and fiscal planning.