Despite the East Coast roots of technology entrepreneurship and venture capital (VC), it is well documented that, by the 1990s, Silicon Valley had stolen a march on the Cambridge-Boston area. In 1995, Silicon Valley’s share of all VC investments in the U.S. stood at 22.6%, more than twice New England’s share at 9.9%. It is less well-known however that, since then, Silicon Valley’s share of U.S. venture capital has skyrocketed, unaffected by wide fluctuations in the total pool of VC investments during this period. With an almost 50% share, the Bay . . .