Career-focused women are struggling to meet men with a similar level of education and financial income - but refuse to ‘marry down’.

A generation of high-flying women cannot find eligible men that they would consider marrying, and this is down to their lack of degrees and high incomes, a US academic study claims.

For women marriage often involves ‘marrying up’ but as personal fortunes have increased, expectations have failed to adjust.

The study said: ‘Unmarried women, on average, are looking for a man who has an income that is about 66% higher and a likelihood of having a college degree that is about 49% higher than what is available.’

Career-focused women are struggling to meet men with a similar level of education and financial income - but refuse to ‘marry down’

The lead author Daniel Lichter, professor of sociology at Cornell University, and co-author Joseph Price of Brigham University, think they’ve created a formula for working out what unmarried women desire in a potential partner.

Analysing data from 10.5million households surveyed for three years from 2010 by the US Census Bureau, they established the traits of married couples aged between 25 and 45-years-old.

In their working paper, Mismatches in the Marriage Market, they assume that unmarried women are searching for men similar to those already married.

Price said the findings were relevant to Britain due to the similar trends, the Times reported.

Lord Willetts, chairmen of the Resolution Foundation think tank, added: ‘This American research is telling us that the days of the conventional male breadwinner are disappearing and this changes relationships between the sexes.’

he academics said this could lead to many career-focused women deciding to stay single or if they do marry, it will be poorly matched economically

Fifty-five per cent of women enter higher education by the age of 30 compared to 43 per cent of men and the amount of couples where only one adult works has nearly halved in the past 40 years, according to the Institute of Fiscal Studies.

Susanna Abse, a psychoanalytic psychotherapist, said both sexes are to blame and that people should be more satisfied with ‘ordinary’ partners and not hold onto a fantasy idea.

The academics said this could lead to many career-focused women deciding to stay single or if they do marry, it will be poorly matched economically.

Harry Benson, research director at the Marriage Foundation, said: ‘The marriage market may be further skewed against high-flying women because potential male partners are still predisposed to “marrying down”.’

But he added that what makes a marriage work isn’t usually anything to do with income or education but instead commitment and interests along with friendship and kindness.