693 Right ball park referred to your confusion between micro and macro and the use of GDP industry level data. You are confused about many things. State and local government don't "peer review". They aren't my peers:) They don't have he statistical background to do a review. This is going to an academic journal. Why should I provide you with a stat. on productivity? Go to www.bea take the chained GDP number for the construction industry here and divide it by employees. Compare and contrast. The effort will do you good. Maybe even lead to a glimmer of understanding. Further, you misunderstand noncompetitive. The way markets are supposed to work is you have high profits. New firms rush in to take advantage. Supply increases, prices fall, and profits become normal. Doesn't happen here. I suspect because of land distribution. Really 693? I don't have to provide footnotes for my comments because these are my own analysis. Take a course.