You don't have to include them because they are separate cities with separate governments and separate growth plans. And they don't have similar development pol

You don't have to include them because they are separate cities with separate governments and separate growth plans. And they don't have similar development policies. Palo Alto is different from Mountain View which is different from Atherton. Mountain View has WalMart and Costco and Google. Palo Alto limits retail to 20k sqft, so there are no big box store or even supermarkets. Atherton just has a bunch of big houses. The differences are great - it lets people pick what the like and live there.