Study: US Child Poverty Is Four Times Stickier Into Adulthood Than Denmark's

The Study

A study published in Nature Human Behaviour finds that child poverty in the United States is more than four times as likely to carry into adulthood as it is in Denmark and Germany, and more than twice as likely as in the United Kingdom or Australia. The findings were reported by The Atlantic, which published an essay from one of the study's authors alongside co-authors Gøsta Esping-Andersen, Rafael Pintro-Schmitt, and Peter Fallesen.

The researchers focused on what happens after childhood ends, not the conventional factors like parenting, neighborhoods, and schools. Their conclusion: the biggest driver of the U.S. gap is how little government support poor Americans get once they become adults.

What The Numbers Show

The study compares outcomes for people who spent significant portions of their childhood in poverty across five countries. In every country, kids who grew up poor were less likely to finish higher education or work full-time as adults than kids who didn't.

What differs is what happens next. A Dane who grew up poor is far more likely to receive unemployment benefits, means-tested income support, or a child allowance as an adult, and is therefore far less likely to still be poor later in life. According to the authors, this "tax-and-transfer insurance effect" matters more than commonly cited factors like parental education or marital status in explaining why the U.S. lags its peers.

The authors calculate that if the U.S. adopted the tax-and-transfer generosity of Denmark, Germany, the UK, and Australia, the cycle connecting child poverty to adult poverty could shrink by more than a third.

The study also found that racial discrimination does not explain why poor U.S. children are so much likelier to remain poor as adults: white children who grow up poor are just as likely to be poor as adults as Black children who do. And the gap between the U.S. and its peer countries is larger than the gap between high-mobility and low-mobility places within the U.S. itself — even the most economically mobile American cities show stickier poverty than the U.K., Australia, Denmark, or Germany.

The Case For Taking This Seriously

The U.S. has long branded itself the land of upward mobility. If a kid born poor in America is more likely to stay poor than a kid born poor in Britain or Australia, two countries not exactly known as socialist utopias, that presents a real challenge to the American mobility narrative.

It also complicates lazy assumptions on both sides: the left's belief that childhood spending alone fixes mobility, and the right's claim that culture and family structure explain the whole gap. The data points to something more specific: adults who grew up poor need a functioning safety net when they hit unemployment, illness, or hardship, not just help when they were six years old.

The authors also point to a real-world test case: in 2021, the expanded child tax credit pushed the U.S. poverty rate to its lowest level ever recorded. After the expansion expired in 2022, poverty and food hardship increased again — evidence, the authors argue, that a more restrictive, targeted welfare state is unlikely to promote upward mobility from poverty.

The Fair Counterargument

The study itself acknowledges a defensible counterpoint: some would argue that self-sufficiency — giving people the means to overcome poverty without government income assistance — should be the aim of policy, rather than transfers. That's a legitimate policy position, even if the authors note it conflicts with the fact that all high-income countries in their comparison include government taxes and transfers when measuring poverty in the first place.

There's also a causation question worth flagging. Countries with generous adult transfers tend to differ from the U.S. in plenty of other ways — labor markets, industrial structures, social networks. The authors' own framing describes an "insurance effect" identified through comparison across countries, not a randomized experiment, so isolating the transfer effect from everything else those countries do differently is inherently difficult.

The concern about American mobility isn't fake. But the study's own data suggests the honest answer is narrower than a simple "copy Denmark": what the U.S. lacks specifically is post-childhood support — unemployment benefits, means-tested income support, and family allowances — not necessarily every feature of how European welfare states are built.

What's Unresolved

The study doesn't model what expanding U.S. adult transfers to match its peer countries would cost taxpayers, or how it would affect labor-force participation. The open question for policymakers: can the U.S. capture the mobility gains this study identifies, and if so, through which specific programs — unemployment insurance, means-tested support, child allowances — rather than a wholesale import of another country's system.