How to Evaluate a Real Estate Economy Over Time?

[Will E.]

Is there a web site that would help me to see changes in a local area's real estate economy over that last N years?   I'm interested in economies that are driven by high tech growth.  Because not only do these economies get job growth, but the job quality improves with higher wage earners.   It would be nice if you could peek into a time graph for each zip code in a region to see how the composition of wage earners is changing over time.   Does anyone sell or give away that kind of data?