In models of a multiproduct firm with increasing returns to scale, prices are not set equal to marginal costs. Ramsey prices, which are inversely proportional to the elasticity of demand when demands are independent, are usually used in this situation. An analogous pricing system has been...

The characterisation of the Western city through binary classifications seems increasingly inappropriate, first, because cultural fusions produce 'thirdspaces' which can only be captured in a more complex spatial language and, secondly, because a thirdspace politics is needed to resist the...