One of the big issues at this year's TV festival in Edinburgh is the effect of on-demand content, undermining any conventional notion of programme scheduling.

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"Anything that extends the network effect of users and deepens the pool of content is a plus, " he said.

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The APIs are structured in such a way that well-implemented code will collect valuable information about how the content is used as a side effect of educators, parents, and others simply doing their daily work.

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Conceding the point, Dow has cut back production of chemicals in North America and is content, in effect, to collect a fee for showing the Arabs how to run a chemical plant.

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In this context, a network effect is a positive feedback loop whereby platforms with stronger ecosystem of developers, content and service providers attract more customers.

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Gamers unhappy with the endings of Mass Effect 3 will get "further closure" thanks to new added content, developer Bioware has announced.

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If the search engineers at Google want evidence that their recent adjustment of their algorithm to favor higher-quality content is having the intended effect on content creators, they need look no further than the PaidContent 2011 conference.

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