Google's market share in this business is tiny, but Susan Wojcicki, who oversees DoubleClick and other operations, reckons there is "a lot of friction in the system" that it can still remove.

谷歌这方面的市场份额微不足道，但负责DoubleClick公司及其他业务的Susan Wojcicki认为，谷歌仍可以克服“该系统中的很多阻力。”

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MM theorem 3 indicates that financial policy is not related to capital structure in a market without friction.

经典MM定理3表明：在无磨擦的完全市场下，财务政策和资本结构是不相关的。

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Friction in the labor market the phrase economists use to describe inefficiencies in matching employers with people looking for jobs might be eased if companies with low-skill, high-turnover jobs make it easier for job seekers to find and apply for openings, said Richard Freeman, a labor economist at Harvard University who has studied online job markets.

WSJ: How Your Smartphone Could Get You a Job