The issue range from whether the government's estimates of migration are good enough, to whether the figures should be used to direct more public money towards areas with high numbers of new arrivals.

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It blamed the cost of developing its new tablet-format Blackberry, as well as a migration of consumers towards cheaper handsets in its product range.

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It's difficult to show a perfect cause-and-effect relationship when it comes to migration patterns, as individuals and families move for a wide range of reasons.

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This migration could explain why the undefined disease is thought to affect such a wide range of organs and engender such a variety of symptoms.

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Oracle believes that the merger will accelerate a migration to all-IP networks, and will allow the software company to provide customers with a broader range of services.

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