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Wed to success

> British economist David Ricardo’s theory of comparative advantage states that it’s more efficient to do the tasks you’re better at.

So leave making dinner to your other half and get on with the vacuuming.

> American economist Edward P Lazear writes that paying workers on the basis of output will increase their output. The secret to persuading your spouse to do the jobs they hate is simply a question of finding the right incentive.

> If having sex carries too many costs - too much time or energy - you’ll do it less. If you’d like more action, the key is to reduce the cost. Be more transparent, reset your habits, and send the right signals to your partner.