In the business-school market, London Business School and City University London's Cass Business School both launched executive M.

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As Peter Hahn of the Cass Business School in London points out, a bank that suddenly increases its market share, or expands its balance-sheet, is usually the one to watch.

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Andre Spicer, a professor of Organizational Behavior at the Cass Business School in London, said the loss of a "great leader" such as Ferguson is similar to "enduring a death" for a company.

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