This paper presents a simple, analytically solvable Chamberlinian agglomeration model. As in the canonical core-periphery (CP) model, two agglomerative forces are at work. However, the present model exhibits a 'pitchfork bifurcation' rather than the 'tomahawk bifurcation' of the CP model.

The concept of megaregions is increasingly put forward among academics and policy makers as a new scale of economic co-ordination and social organisation. A megaregion is most commonly understood as an economic unit that comprises an agglomeration of cities and its less dense hinterlands, which...