TY - JOUR AU - Krugman,Paul TI - A Dynamic Spatial Model JF - National Bureau of Economic Research Working Paper Series VL - No. 4219 PY - 1992 Y2 - November 1992 UR - http://www.nber.org/papers/w4219 L1 - http://www.nber.org/papers/w4219.pdf N1 - Author contact info: Paul R. Krugman Department of Economics Princeton University Woodrow Wilson School Princeton, NJ 08544 Tel: 609/258-4570 Fax: 609/258-2809 E-Mail: pkrugman@princeton.edu AB - Any interesting model of economic geography must involve a tension between "centripetal" forces that tend to produce agglomerations and "centrifugal" forces that tend to pull them apart. This paper explores one such model, and shows that the model links together a number of themes in the geography literature. These include: the role of market access, as measured by a measure of "market potential", in determining manufacturing location; the role of forward and backward linkages in producing agglomerations; the potential for "catastrophes", i.e., discontinuous changes in location in response to small changes in exogenous variables: and the idea that the economy is a "self-organizing system" that evolves a self-sustaining locational structure. ER -