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Can Hollywood give US economy a happy ending?

31 July 2013 Last updated at 11:45 BST

Historic changes are being made to the way United States growth is measured.

The question of how to encapsulate a country's economic health - or GDP - in a single figure presents many challenges.

Now experts believe a new calculation, including film and television output, will give a better idea of the progress of the world's largest economy - as Michelle Fleury reports from New York.