As a San Francisco native, it has always astonished me that people would want to start tech companies here. The city government is just so hostile. Kevin Erdma

As a San Francisco native, it has always astonished me that people would want to start tech companies here. The city government is just so hostile. Kevin Erdmann wrote an interesting thesis about this. In the past, American cities were built densely, but in the 20ᵗʰ Century they all embraced cars and NIMBYism. The few existing densely built cities thus have become a sort of limited natural resource, impossible to replicate elsewhere in the country and (in purely economic terms) worth the extreme cost of entry.