The most persistent criticism I have heard of my writingsonconstructioncosts, coming from YIMBY Princeton, is the importance of gradual expertise and experience. Against my claim that Americans build subways for higher costs than the rest of the world due to poor management practices, regulations, and procurement, and scope creep, YIMBY Princeton says that high costs are a result and not a cause of the rarity of American subway investment. I believe that high US costs are endogenous and therefore the US is reluctant to fund rail transit; he believes that disinterest in transit is endogenous and if the US were willing to build more rail lines, then construction costs would naturally go down through economies of scale and steady accumulation of project management expertise. I promised last year that I would go over his argument more carefully, and am going to do so in this post.
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Utopia, you are standing in it! 
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