I, and many others, have argued that following the AI buildout, investments in AI will eventually undermine labor's share of income as the declining cost of AI encourages firms aggressively to substitute computers and software for humans in the workforce.
The Bureau of Labor Statistics (BLS) will not release its estimates of third-quarter productivity and costs - including labor's share of Gross Value Added (GVA) - until Thursday of this week. However, if one knows where to look in last week's preliminary estimate of the National Income and Product Accounts for the third quarter, one can calculate the most recent share for the business sector by subtracting from total compensation of employees both the compensation of general government employees and the compensation paid by private households and nonprofit institutions serving households, and then divide the residual by the GVA of the business sector.
The recent history of that calculation is depicted in the chart. Following the introduction of ChatGPT in late 2023 there was no immediate decline in labor's share of income. However, in 2025 that share began slipping, and by the third quarter of 2026 it dropped to 49.1%, the lowest reading recorded in the quarterly data back to 1947.