Construction of heteroclinic networks in R-4

We study heteroclinic networks in R-4, made of a certain type of simple robust heteroclinic cycle. In simple cycles all the connections are of saddle-sink type in two-dimensional fixed-point spaces. We show that there exist only very few ways to join such cycles together in a network and provide the list of all possible such networks in R-4. The networks involving simple heteroclinic cycles of type A are new in the literature and we describe the stability of the cycles in these networks: while the geometry of type A and type B networks is very similar, stability distinguishes them clearly

A third sector in the core-periphery model: non-tradable goods

We extend an analytically solvable core-periphery model by introducing a monopolistically competitive sector of non-tradable goods that is mobile across regions. We find that when the elasticity of substitution among non-tradable goods is very low, there is agglomeration of all the production (of both tradable and non-tradable goods). When the elasticity of substitution among non-tradable goods is sufficiently high ("no black-hole" condition), then there is symmetric dispersion of all the production, if trade costs are high; or full agglomeration of the production of tradable goods with partial agglomeration of the production of non-tradable goods, if trade costs are low

A prospective review on new economic geography

This paper serves as an orientation towards the understanding of some of the contributions and theoretical limitations in New Economic Geography and seeks to provide a prospective assessment of new avenues of research along which the field could improve and develop. We identify many of the persistent features and assumptions which have thwarted the evolution of New Economic Geography and led to a sprawl of criticism within the field. This criticism has opened a discussion towards the identification of new possible directions, some of which are being progressively undertaken, while others raise issues that are difficult to overcome both analytically and empirically.info:eu-repo/semantics/publishedVersio