The AI-Driven Productivity Tide May Not Lift All Boats

In recent editions of Macro Signposts (here), we’ve emphasized how U.S. policy changes coinciding with the emergence of a new general-purpose technology (AI) may be accelerating adoption and diffusion of that technology – while also driving economic adjustments. So far, those adjustments have supported relatively stable real GDP growth in the U.S., but we see fragilities under the surface.

AI-driven productivity gains have buoyed asset prices and supported consumption through wealth effects, while investment has been narrowly concentrated in AI implementation and infrastructure. As a result, near-term U.S. economic performance will likely depend heavily on how the AI transition progresses.

AI is a relatively new technology. Large language models (LLMs) as general-use systems for the broader public became available in 2022, with widespread U.S. business adoption only starting to accelerate in 2025, according to U.S. Census Bureau data.

There are a lot of unanswered questions around how the economic adjustment will play out. Whether AI will primarily be a substitute or a complement for labor, how quickly it diffuses across the economy, and ultimately who wins versus loses are all very difficult to forecast. Unlike past general-purpose technologies, which took decades to diffuse, AI use is spreading fast, with divergent consequences across the economy. Recent sharp declines in equity and loan valuations across AI-exposed sectors underscore these risks.

Given the uncertainty, comparisons to historical economic transformations that followed the introduction of general-purpose technologies are natural. Specifically, the late-1990s diffusion of personal computers, networking, and the internet, which drove a productivity boom, is a potentially useful study for today. However, there are important differences between the late 1990s and what is happening today. If 2025 is a preview, AI might not be a productivity tide that lifts all boats. Indeed, the risk is that much of the value AI creates will accrue primarily to capital holders – not workers.

Lessons from the 1990s …

In 1994, Nobel laureate economist Paul Krugman remarked that while productivity isn’t everything in the long run, it’s “almost everything.” Productivity-enhancing new technologies have tended to raise living standards by augmenting both supply and demand over time – a tide that lifts all boats. Achieving greater output with the same level of input (whether through technological innovation or any means) increases productive capacity simply by definition. As part of this trend, more productive workers tend to earn higher real wages, and more productive capital tends to earn higher returns. Higher real wages and profits should in turn encourage consumption and investment, and support demand.