On the immobile front, the infrastructures of urbanization are crucial, both as foci of investment to absorb surpluses of capital and labor (providing localized/regional forms of the “spatial fix” as through the dynamics of suburbanization or the building of airport complexes) and as the necessary fixed capital of an immobile sort to facilitate spatial movement and the temporal dynamics of continued capital accumulation. In much of my own work, I have focussed upon the production of space through urbanization as a key site where the contradictions of capital are always at work. Many of these studies focus upon the tension between the two kinds of “fixes” – that which is perpetually seeking to resolve the crisis tendencies of capitalism (overaccumulation) through the production of space (consider, as an example, the key role of suburbanization in the United States after 1945 in absorbing surpluses of capital and labor); and that version of the fix which is about the tying up and the pinning down of large amounts of capital in place through the production of fixed and immobile capital in the built environment (e.g. the highways systems needed to facilitate suburbanization).