local govts did a few things to enable this. They created a welcoming business environment that allowed for rapid expansion. For example, Stanford Research Park was a joint venture of Stanford, and Palo Alto. I am not sure there is any good writeup on the contribution of local governments to silicon valley.
Do you know how many local govts tried to do similar things and it failed? Local govt is not the essential component here.
If you say so. As an outsider (although I used to work close, in Sacramento, for 5 years), I only can say that I did not hear anything about substantial govt participation, similar to post-war infrastructure projects, or recent push for green energy.
But, of course, I will be glad to find out that the Valley is the coproduct of some govt program, not only a lucky star alignment.