Has income growth across successive generations of Americans slowed?
Core argument: Household market income for Baby Boomers in their late 30s was 31% above that of similarly aged Silent Generation adults, while Generation X gained 10% over Baby Boomers and Millennials gained 15% over Generation X.
We zoom in on a focal age range in people’s late 30s—an age at which we observe the five generations from the Greatest Generation (born 1901–1927) through the Millennial Generation (born 1981–1996)—and assess both whether generational progress is positive and the extent to which the rate of growth is speeding up or slowing down. Focusing first on median market income, there are two notable takeaways that apply for both the individual/couple and the household sharing units.The first is that generational progress has clearly slowed since the Baby Boom Generation, although it remains positive. Second, despite the perception that slowing generational progress is a recent phenomenon, the substantial slowdown did not start with Millennials but began a generation earlier with Generation X. Looking at the patterns formed in household market income by generation, the income of Baby Boomers in their late 30s was 31% above that for similarly aged adults in the Silent Generation. Progress slowed substantially for Generation X—their incomes increased by 10% relative to Baby Boomers—and then ticked up for Millennials, whose incomes rose by 15% relative to Generation X. Although market income is an important indicator of progress, it does not reflect the full set of resources that individuals have available for consumption. The slowdown in generational progress is softened when accounting for taxes and transfers.



