The Economist
The geography of start-ups
Why birds of a tech feather flock together

IN THE LATE 19th century Alfred Marshall, a founding father of modern economics, asked why firms in the same industry were often geographically near each other. Proximity, he said, created something “in the air”: “…if one man starts a new idea, it is taken up by others and combined with suggestions of their own; and thus it becomes the source of further new ideas.”

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Mark A.M. Kramer | @MAMK | | |

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