What is GDP ? It's a phrase you hear bandied around daily. It's a part of the modern vernacular, and yet rarely does one stop to think - what does it represent? Why is it important ? Where did GDP, or Gross Domestic Product come from? Dianne Coyle is an economist, Professor of economics at Manchester University and author of several books, including 'GDP: A Brief and Affectionate History' out on Princeton University Press. Diane is also acting Chair of the BBC Trust, so has some interesting insights into public broadcasting.
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