This is a conversation I have been staying out of because it has been going in circles.
However, Alan's recent observation about real estate develop being less productive for the economy then other areas is only true if you look at only the number of jobs contributed to that particular project. Unfortunately, economics is never that simple.
Now, if you look at the overall effect a good development has on a neighborhood or community, it is clear his observation is wrong.
The world is truly shaped by good design, and the design of spaces and buildings can have a tremendous impact on how economically successful a particular area is, or is not. How willing we are to visit an area is directly related to the development of that area and the architecture employed.
Take for instance out door seating at a restaurant. You instantly feel safer to walk down a street with it, and will go out of your way to be there. So a good developer will build his buildings with this mind, making sure to get the right permits, etc. This then increases the economic success of the area and compounds on itself.
Sure, it makes the developer more, but also allows for greater returns for all other businesses in the area.
Of course, areas with little or sub-par development go the opposite direction, and the micro economy of that area suffers.
(Note, I am looking at this from the point of view of a city slicker. I will contest that suburban development has little effect on the economy, but I would never be caught dead living in suburbia.)