According to the study by Cologne-based Institute for the German Economy, in today's world, women are increasingly using money or a healthy bank balance as overriding criteria for choosing their partners.
With women getting better jobs, they are looking for their men to have a spending power to match, says the study.
For their study, researchers carried out a survey in which women respondents said they wanted to avoid stress and confrontation over big differences in earnings, Britain's the Daily Mail reported.
The findings showed that the number of households in which one person earns much more than the other has decreased in the 10 years between 1998 and 2008.
And, at the same time, couples with two average or high earners increased from 27.9 per cent to 30.5 per cent.
Couples that included a high earner and a low earner in the relationship decreased by 2.8 per cent from 28.6 to 25.8
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