In addition to income and hiring outlook, they look at the work environment, including hazards like toxic fumes or exposure to the elements, physical demands like heavy lifting, and stress factors including deadlines, competitiveness and travel.

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Based on all the key factors--strengthening our competitiveness, protecting our strategic position, generating attractive financial returns--the Google agreement is far better than Microsoft's search-only hybrid proposal.

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In an economy characterized by the convergence of globalized commerce, widely available information and rapid technological progress, innovation and entrepreneurship are crucial factors in sustaining and growing U.S. competitiveness in the world.

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Our systems balance a number of factors such as the size of the target audience in a country, the competitiveness of the market for ads at that time and levels of engagement with ads.

BBC: Technology