Elon Musk, the founder and chief executive of Tesla Motors, is accusing the New York Times of faking data about how the electric Model S performed in cold Northeast weather.

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Unlike traditional businesses, where you may have a choice about whether or not to use a data-ubiquity business model, in Consumer Web businesses, there is usually no choice.

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The business model also demands that Facebook care more about delivering user data to advertisers than ensuring the privacy of their users.

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The caution stems in part from concerns about how the company's policy on access to its data may change as its business model becomes clearer.

ECONOMIST: Greenhouse-gas monitoring