Do falling labor shares and weak investment explain higher valuation ratios?
Core argument: The authors argue that a declining labor share of corporate output combined with relatively weak corporate investment mechanically generates a persistent rise in corporate valuation relative to earnings, even absent changes in expected returns or growth rates.
We use macroeconomic data derived from the Integrated Macroeconomic Accounts (hereafter IMA) to argue that the observed decline in labor’s share of corporate output in conjunction with relatively weak corporate investment mechanically generates a persistent rise in the ratio of corporate valuation relative to corporate earnings, even absent any changes in expected returns or growth rates. We consider two broad measures of corporate income, which we label earnings and free cash flow, where the latter is defined as earnings minus net investment. These data offer the following insights regarding trends in the value of U.S. corporations. 1. The enterprise value of U.S. corporations has boomed in recent decades relative to corporate output. 2. The large increase in the enterprise value of U.S. corporations from 1980 until the middle of 2022 coincides with an equal-sized increase in the share of corporate value added flowing to corporate owners as free cash flow. Thus, the ratio of free cash flow to enterprise value was unchanged over that period. 3. The observed growth in free cash flow largely reflects a similar-sized decline in the share of corporate value-added paid to labor. 4. The boom in corporate valuations has not been accompanied by significant growth in measured investment and capital. As a result, measured investment and capital are now a much smaller portion of enterprise value than was the case historically.




