THE Organisation for Economic Co-operation and Development has long lectured its rich member countries about pursuing free trade, privatisation, and flexible Labour and product markets.

经济合作与发展组织一直在说教成员国中的发达国家，让其继续推行自由贸易，私有化和富有弹性的劳动力和产品市场。

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Pitch: An office worker shakes a crystal ball, says it predicts free Doritos, and hurls the ball at a vending machine so co-workers can grab all the Doritos they want.

情节：一名公司职员摇着一个水晶球，说这个球可以预测免费的多力多滋，并把球抛向了一个自动贩卖机，以便让同事们想拿多少就拿多少多力多滋。

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The company wants to make advertising "relevant and useful" and the company's co-founder Sergey Brin sees search as more than just a way to find free music.

Google公司想要把打广告变得有关联和有用的，公司的创立者之一sergey Brin认为不能把搜索看作仅仅是寻找免费音乐的一种途径。

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And the three strategies did, indeed, have the same average pay-offs to the individuals who played them though only 13% were co-operators, 20% free-riders and 63% reciprocators.

ECONOMIST: Human evolution

The researchers were able to divide their subjects very cleanly into co-operators, free-riders and reciprocators, based on how many tokens they contributed to the pool, and how they reacted to the collective contributions of others.

ECONOMIST: Human evolution

Co-pay-free contraception is law of the land: As part of the ACA, HHS announced that contraception would be included in the list of preventative services that must be covered without a co-pay. (Is there anything more preventative that contraception?) A tempest erupted.

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