S9 Ep59: Life after divorce

Who gets the kids? Courts aim to decide custody in the child's best interests, but nobody has had the data to test how well those decisions work.

Gordon Dahl (UC San Diego, CEPR), Costas Meghir (Yale, CEPR) and seven co-authors built the data themselves. They collected more than 56,000 Swedish custody rulings, scanning paper files by hand where no digital copy existed, and linked them to records of parents' earnings, prescriptions and children's school tests.

It seems Swedish judges do not agree on how often to award joint custody. Some award it in about 60% of cases; others in about 20%. But that decision makes a huge difference to the lives, and happiness, of both parents and children. They tell Tim Phillips whether joint or sole custody has, on average, better outcomes.

The research behind this episode:

Canessa, Stella, Gordon Dahl, Anna Hasselqvist, Costas Meghir, Susan Niknami, Marten Palme, Helmut Rainer, Olof Rosenqvist, and Pengpeng Xiao. 2026. "Life After Divorce: Effects of Joint Custody on Parents and Children." CEPR Discussion Paper 21780.

To cite this episode:

Phillips, Tim, Gordon Dahl, and Costas Meghir. 2026. "Life after divorce." VoxTalks Economics (podcast).

About the guests

Gordon Dahl is Professor of Economics at the University of California, San Diego, and a Fellow in the Labour Economics programme of the Centre for Economic Policy Research. His research spans the family, public policy and the labour market, including how family income shapes children's achievement, peer effects among co-workers and family members, the effects of incarceration on employment, and how welfare use passes between generations.

Costas Meghir is the Douglas A. Warner III Professor of Economics at Yale University and a CEPR Fellow in the Labour Economics, Development Economics and Public Economics programmes. His research spans labour supply and welfare programmes, marriage markets and how resources are shared within households, informal labour markets, and early childhood development.

Research cited in this episode

The best interests of the child standard. Since the 1970s, most custody law has told judges to decide in the child's best interests rather than weigh the parents' claims. Most countries now read this as keeping both parents involved, which is why joint custody is the default in many jurisdictions. The standard leaves wide discretion to judges, and Meghir says judges get little systematic evidence on what works. Elizabeth Scott and Robert Emer