The pact covered recordings, tours and endorsements, and provided funding for Roc Nation, a joint-venture record label and talent management agency over which Jay-Z would preside.

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There has been no comment from the rappers' management or record label, and it was not immediately clear whether they had lawyers.

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Critics have lambasted Gates for a management style they label overbearing and bossy, but his harsh workplace demeanor belies another secret to his success: his unwillingness to compromise his goals.

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The FDA initially declined to approve it, asking in March 2010 for more information about the drug's prescribing label and the companies' risk-management plan to ensure the drug's benefits outweigh its risks.

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In addition, management has worked hard to develop private label fashion merchandise that will appeal to a more value-oriented customer.

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OpenShop, a fully partitioned white label app marketplace, offers revenue sharing opportunities and individual content management controls.

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The company powers the textbook rental services of 250 campus bookstores through white-label partnerships, running touchscreen kiosks, iPhone apps and inventory management software.

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