How should we think of the role of regions in relation to the global economy? Theory has surprising gaps when it comes to building a unified vision of these two scales of development. Two contributions to such a vision are proposed in this article. First, the relationship between geographic concentration and the regional economic specialization it underpins and globalization should be theorized as a dynamic process. Standard location and trade theory is not adequate for this task; instead, the dynamic relationship can be captured through growth theory. But capturing this dynamic relationship requires correcting growth theory to separate its local and its global components, which are, respectively, Marshall- Arrow and Romer externalities. Second, the missing element in all theories of geographic concentration and locally specialized development is an element labeled “context” here. A theory of context, in turn, raises important new questions about the dynamic welfare and developmental effects of contemporary processes of fragmenting and relocating production at a global scale.
