AI's costs are arriving before the productivity dividend

The central economic problem with the AI boom may be timing. In a September 28 speech, Federal Reserve Governor Lisa Cook argued that AI-related investment is adding near-term inflation pressure through surging demand for chips, computers, software and physical infrastructure. She noted that electricity and water costs rose roughly 5% over the previous year and said AI demand may be one contributing factor. Her broader forecast was deliberately uneven: short-term investment can raise prices, medium-term productivity may modestly reduce inflation, and labor markets could still undergo a painful transition. Even the eventual productivity dividend may not fully reach consumers if market concentration keeps markups high. This is a policymaker's analytical framework, not a causal estimate showing that AI produced a specific share of inflation. Energy prices, trade policy, supply constraints, weather, construction cycles and many other forces are moving at the same time. The speech matters because it rejects the idea that productivity is one immediate national number. Costs can arrive in utility bills and construction bottlenecks before the software changes output. Gains can appear inside a firm while displaced workers or communities carry the transition. Maryland's new business AI benchmark points to that uneven diffusion: experimentation is widespread and regular users report productivity, but many firms remain at basic use and say they plan to make existing workers more productive rather than reduce headcount. The question for economic policy is not only whether AI raises long-run output. It is who finances the bridge between today's buildout and tomorrow's uncertain gain.