Paper:  The Geography of Unconventional Innovation

Kedrosky in his newsletter: “the primary benefit of doing startups in dense cities (to a point) is that it increases the likelihood of “collisions”, of people, by chance, running into other people. That can lead to an exchange of ideas, which provokes new ways of thinking, and sometimes turns into innovations”

apparently only VC’s should never become clubby and stop colliding with people

etting Tired of Your Friends: The Dynamics of Venture Capital Relationships