Cultural Factors: The impact of culture cannot be underestimated, as it directly informs behavioral norms.

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Washington operates by customs and behavioral norms as much as it does by laws and parliamentary rules.

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What helped them initially grow becomes locked-in by behavioral norms, structural decision-making processes and a cost structure that may be tweaked, but rarely changed.

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The longer term solution would be to develop an appropriate social contract: conducting ourselves online under the same civilized behavioral norms that keep us from, say, stealing stuff from one another's homes even though we could probably get away with it.

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It's hard to change our laws, the way we think and ultimately our behavioral and cultural norms, yet that is the challenge ahead of us.

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Obesity seems to spread in networks because of behavioral imitation -- you copy what people close to you are doing -- and shared expectations called "norms, " the authors said.

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