How do wages relate to productivity?

The relationship between wages and productivity is central to inflation dynamics. Productivity measures output per hour worked; wages measure compensation per hour worked. When both grow at the same rate, businesses can absorb higher labor costs without raising prices because each worker is producing proportionally more output. The key concept is "unit labor costs" (ULC), which equals compensation per hour divided by output per hour.

When wages outpace productivity (rising ULC), businesses face a choice: absorb the cost by accepting lower profit margins, or pass it through to consumers via higher prices. In competitive markets with thin margins, most of the cost increase flows into prices, making rising ULC a direct inflation driver. The Fed monitors ULC closely for this reason; persistent ULC growth above 2% is inconsistent with the 2% inflation target unless businesses permanently accept margin compression.

The US experienced a long-term divergence between productivity and wage growth beginning in the 1970s. Productivity continued to grow at roughly 1.5-2% annually, but real (inflation-adjusted) median wages stagnated. The gains from productivity growth increasingly accrued to capital owners rather than workers. This divergence is one of the most analyzed phenomena in modern economics, attributed to factors including globalization, automation, declining union membership, and market concentration.

During 2021-2023, the opposite dynamic emerged. Wages surged 5-7% annually for lower-paid workers while productivity growth was flat or negative. This combination produced rapid ULC growth, which the Fed identified as a key transmission channel for persistent inflation. The soft-landing scenario required either wages moderating toward 3-3.5% growth (consistent with 2% inflation plus 1-1.5% productivity) or productivity rebounding. AI-driven productivity improvements represent a potential structural shift that could change this equation, allowing higher wage growth without inflationary consequences.