Bad for business or a shot in the arm for Europe?
Business leaders and economists at the World Economic Forum in Davos have been divided over David Cameron's referendum plans.
Among the criticisms is the potential timing of the vote, with Britain possibly deciding on whether to stay in the EU just as its members are coming out of recession.
From Davos, ITV News Economics Editor Richard Edgar reports:
Read: More from Richard Edgar on concerns in Davos about Cameron's referendum pledge.
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