In this paper, it is argued that, given its relatively short duration and high year-to-year variability, the MFP data set does not contain enough information to allow clear statistical discrimination between competing hypotheses. As a result of this lack of information, combined with the human...

Recent developments in the global system of cities present a curious paradox. With the cost of communications declining almost to zero and substantial, though less dramatic reductions in transport costs, there is now little technical requirement for most kinds of production to be undertaken in...