Post Office Ltd said the relocation of services to the WH Smith shops would "safeguard and enhance" services.

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One reason: "Certainly, more and more companies are sending people overseas, " says Scott Sullivan, executive vice president of Brookfield Global Relocation Services, a Woodridge, Ill.

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According to a recent survey by Brookfield Global Relocation Services, only 18% of international assignees are female.

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