AI Data Center Investment Now Exceeds Peak Railroad and Highway Eras as GDP Share

Ethan Mollick cites data showing US AI data center investment as a share of GDP has surpassed the combined peak of railroad and highway buildouts, though AI's actual economic penetration still lags far behind the railroads of that era.

2026-09-28 ~ 2026-09-29 · 2 related posts

• US AI datacenter spending as share of GDP now exceeds historic railroad and highway buildouts combined — rvp · 2026-09-28
• AI buildout exceeds railroad-era share of GDP, yet economic impact lags far behind — emollick · 2026-09-29