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Big family versus small family

22 August 2013 Last updated at 10:31 BST

Having a large family need not be expensive - and can work out just as cheap as having just one child - according to a book from the social policy think tank Civitas.

Vicky Kay, who has one child, and Anne Quinn, who has seven children ranging in age from 39 to 11-year-old David, compared notes on the cost, relationships and life in large and small families.

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