Are married women flipping miserable?

It was reported widely around the world recently that unmarried women without children are the happiest subgroup, while married women admit they are miserable when their husbands are out of the room. It was attributed to a happiness expert, Professor Paul Dolan from the London School of Economics. But questions were soon raised about the evidence used to make this claim. So what can we say about the happiness of people who are married, single, with or without children?

Image: Miserable woman
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