Nick Wills-Johnson wonders whether social network and graph theory could help in valuing ecosystem services.

Economic reform in the mid-1990s saw the application of third-party access to railway infrastructure and, in some cases, the separation of above-rail and below-rail services into separate businesses. Reform was based on the notion that the rail track was a natural monopoly, while the above-rail...

Nick Wills-Johnson wonders whether social network and graph theory could help in valuing ecosystem services.

Maskin and Tirole (1998) formalise Edgeworth's (1925) model of a dynamic equilibrium between two players where prices increase sharply and decrease slowly; the Edgeworth Cycle. Here, we present an application of the model, showing how Edgeworth Cycles might arise in a marketplace where spatial...