The could&#x27;ve called it &quot;Silicon Valley.&quot;  Including Monterey county is weird because that&#x27;s inland and costal to the south.<p>Santa Clara county encompasses most of Silicon Valley &quot;proper.&quot;<p>San Mateo county includes the peninsula which starts at Menlo Park and just NW of Palo Alto&#x2F;Stanford.<p>It&#x27;s hard to define clear boundaries of what San Jose because it sub&#x2F;urban sprawls into many other communities (Campbell, Los Gatos, Cupertino, Santa Clara), like individual trees growing into one massive tree cluster.  Plus, most readers out of the area aren&#x27;t familiar where Willow Glen, Blossom Valley or Almaden Valley are without maps.<p>It might&#x27;ve been more interesting to compare the price fluctuations as a heatmap and a function of distance from economic intensive areas.