The U.S. unemployment rate is a low 4.3% and headed lower. Yet inflation remains below 2%. Globalization, China, slow growth, and “transitory factors” such as cheaper cell phone plans help explain stubbornly low inflation. But they’re not the whole story.

Technology is another important—and often overlooked—challenge that central banks face in sustainably meeting their inflation targets. Our calculations reveal that technology’s use in producing U.S. GDP is increasing exponentially. And technology’s reach extends well beyond Silicon Valley. In 1997, U.S. workers used eight cents of technology to make $1.00 of real GDP. Today we use 20 cents, and that number is rising. Increasingly, the Federal Reserve is going toe to toe with Moore’s Law.

The growing reach of Moore’s Law

Notes: Data covers January 1997 through December 2015.

Sources: Vanguard calculations, based on U.S. Bureau of Economic Analysis input-output tables and Thompson Reuters Datastream.

Coined by Intel cofounder Gordon Moore, Moore’s Law has become shorthand for the diffusion of ever more powerful and cheaper technologies. We see it in consumer electronics—the smartphone that is twice as powerful and half as expensive as the one you replace, or the new TV that is flatter, sharper, and cheaper than last year’s model. These well-known, direct effects drag down measures of inflation for those products.

But Moore’s Law is about more than smartphones, TVs, and Amazon Prime. Its knock-on effects restrain the need for higher prices in every corner of the economy, not just in high-tech products. Prices are a markup over marginal costs, and in an increasingly digitized world, that marginal cost inches closer to zero. That’s the story told by our analysis of detailed industry data from the U.S. Bureau of Labor Statistics and the U.S. Bureau of Economic Analysis.

To quantify how the increased utilization of technology is making it harder today to achieve 2% inflation, we identify the technology inputs used by each industry, from recreation and food services to law firms and utilities. We then compare the actual change in prices charged by each industry’s products and services (its Producer Price Index) with the change in a hypothetical index that excludes computer-based technology inputs.

The difference is striking. Since 2001, the declining prices of computer and electronic products, computer design and services, and other technology inputs have trimmed 0.5 percentage point per year from the prices that companies need to actually charge. If Moore’s Law didn’t exist, in other words, annualized inflation would have been 0.5 percentage point higher. Without Moore’s Law, core personal consumption expenditure (PCE) inflation would already be at 2%, and the Fed’s inflation target would have been achieved years ago. Interest rates would be higher.

The impact has been most pronounced in technology-intensive industries, such as professional services and manufacturing. Moore’s Law helps explain how investment managers can now help clients diversify across global stock and bond markets at ever-lower expense ratios. It’s key to the longer-range, lower-cost electric cars rolling off assembly lines in Silicon Valley and Detroit. And it helps explain the slowing rates of inflation in the service fields of education, financial services, and retailing.

There’s little sign that Moore’s Law has seriously entered the Fed’s debate about why its “medium-term” 2% inflation target keeps receding further into the future. Moore’s Law deserves a seat at the table in the low-inflation debate. It provides a more complete and accurate picture of the forces that will shape monetary policy and inflation expectations in the years ahead. And it bolsters our long-held view that tighter labor markets are less likely to set off the kinds of inflation rates they did before Moore’s Law was in full effect.

We live in a digital world that makes 2% inflation harder to achieve. The longer that inflation fails to reach its target, the more some will question whether such a target is ever attainable. The answer is a resounding “yes,” of course, for the Fed and any other credible central bank resolved to achieve 2% inflation. But to ensure a more convincing victory in their fight for 2% inflation, policymakers need to better appreciate this new technological challenger in the ring.

For more detailed information on Joe Davis’s research, please read Global macro matters: Why is inflation so low? The growing deflationary effects of Moore’s Law.