I sort of think this is better represented as a finanacial instrament called Beta. In general we can look at the San Diego Market Representing the general market. La Jolla, Del Mar, PB might have a Beta of .75 whereas National City, Temekula, Santee might have a Beta of 1.4. There fore as the market moves these areas with higher Beta will ahve greater swings in pricing as a percentage.
