The study, which was conducted in America, examined 6,000 heterosexual couples over 15 years.

“These findings suggest that social norms about male breadwinning – and traditional conventions about men earning more than their wives – can be dangerous for men’s health. They also show how strong and persistent are gender identity norms,” said Dr Joanna Syrda, an economist at the University’s School of Management.

“This is a large study but of a specific group – other conventions apply in other groups and societies and the results may change as times move on. However, the results are strong enough to point to the persistence of gender identity norms, and to their part in male mental health issues. Persistent distress can lead to many adverse health problems, including physical illness, and mental, emotional and social problems,” she added.

Earning this much more money than a male partner could stress him out, apparently