HOME /  The Undercover Economist :  The economic mysteries of daily life.

I Do, I Do, I Do, I Do

The economic case for polygamy.

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The Undercover Economist appears on Saturdays in the Financial Times Magazine.

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Tim Harford is a Financial Times columnist. His latest book, The Logic of Life, will be published in paperback on Feb. 10.

Photograph of wedding band on the Slate home page by Stephen Jaffe/AFP Photo.