Like other recommendation engines, Baynote attempts to cluster consumers and understand what products or content interest each cluster in real-time.

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Also trailing by a dozen or so miles was four-time champion Jeff King, who was followed by a cluster of contenders, including Seavey's son, Dallas Seavey.

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Lawyers, accountants, management consultants and other professional-services grunts are drawn to London partly for the same reasons financial-services firms cluster there the global ubiquity of English and a time zone midway between the rich old world and emerging Asia.

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It also led the Latin American contingent in another list, this time compiled by Shanghai's Jiao Tong University and released in August, ranking in the cluster between 101st and 150th.

ECONOMIST: Universities in Latin America

Cluster your outside appointments so that if you are home for the long haul, you have the time to complete your tasks.

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But the main reason that women cluster in low-paid fields, the bank argues, is that they do not control their own time.

ECONOMIST: Women and jobs