At home, men usually have more money and more power than their female partners, and this inequality is particularly wide in LMICs. What does research tell us about how decisions are made and, if there isn’t enough food or money or care to go around, who gets what? And when policymakers try to empower women do their well-intentioned policies work, and can they provoke a backlash? Seema Jayachandran of Princeton and Alessandra Voena of Stanford are the authors of a new review of the evidence, and they talk to Tim Phillips about why women’s power at home is so difficult to measure, and what we don’t yet know about how to increase it.