A novel experiment has found that husbands and wives take it in turns to win arguments while unmarried couples do not.

Economists looking at the issue drew their conclusions from a study of 82 couples, who were asked about their preferences for two outings.
They were asked - individually and then together - whether they would prefer a meal at a famous restaurant or a night at the theatre.
If they disagreed they were asked to agree on a collective decision.
They were also asked if they would prefer a day's karting together or a dance class.
Researchers found that husbands and wives took it in turns to get their own way - but unmarried couples did not.
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They will present their findings this week at the Royal Economic Society annual conference, at Royal Holloway, University of London.
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