The Federal Reserve Bank of San Francisco has turned its analytical lens toward a question that echoes through the entire history of transformative technology: when optimism about a new invention runs high, does it actually translate into real capital investment — or does enthusiasm outpace action?
This is not the first time economists have wrestled with such a question. During the electrification boom of the late nineteenth century, excitement about alternating current swept through industrial circles long before factories retooled their infrastructure. Similarly, the dot-com era of the 1990s saw stock market valuations for internet companies soar years before broadband penetration made those business models viable. The gap between sentiment and tangible investment has always been one of the central puzzles of technological transitions.
What makes the current artificial intelligence moment particularly interesting to historians of the field is its speed. Researchers who labored through the so-called 'AI winters' of the 1970s and 1980s — periods when funding dried up after grand promises went unfulfilled — would recognize the cautionary undertones in any Fed-level scrutiny of AI investment trends. Those earlier cycles left lasting scars on the research community and conditioned a generation of scientists to be skeptical of hype.
Yet the San Francisco Fed's attention to this question signals something meaningful in itself. Central bank economists do not typically study sentiment-driven investment without cause. The fact that AI optimism is now significant enough to potentially move macroeconomic indicators suggests the technology has crossed a threshold that previous waves of machine learning enthusiasm never quite reached.
Whether the current investment surge proves to be a durable reallocation of productive capital — or a replay of earlier boom-and-bust cycles — remains an open question. But the very act of asking it places today's AI moment squarely within a long tradition of societies grappling with the economics of wonder.