Polycentricity and the Multiplexity of Urban Networks

Abstract

Empirical studies on polycentric urban regions (PURs) tend to analyse their spatial organization by examining only one type of functional linkage between cities. However, it has generally been accepted that urban networks are multiplex phenomena and that spatial interactions between cities can take many different forms, for example, commuting, shopping trips, and inter-firm trade. The spatial organization of each of these functional linkages is not necessarily identical, and, therefore, a region can appear to be polycentric and spatially integrated based on the analysis of one type of functional linkage but monocentric and loosely connected based on the analysis of another type of functional linkage. The aim of this paper is to stimulate further discussion on the multiplexity of urban networks with regard to the relational complexity of urban regions. Focusing on one PUR (Randstad Holland), we compare the geographical scope and spatial structure of different functional networks within it. Our results indicate that the spatial organization of the urban network depends on the lens through which it is assessed.     

Route persistence. Modelling and quantifying historical route-network stability from the Roman period to early-modern times (AD 100–1600): a case study from the Netherlands

Research on route-network stability is rare. In time, due to cultural and/or natural causes, settlement locations and route orientation shift. The nature of these spatial changes sheds light on the complex interaction between settlements and surrounding natural landscape conditions. This study investigates the stability of route networks in the Netherlands during the past two millennia by determining their persistence through time. Environmental, archaeological and historical data are used to reconstruct and compare route networks. By using network friction, archaeological data on settlement patterns and route networks in combination with historical data (e.g. old maps), we were able to model route-network persistence (not necessarily continuity) from the Roman to early medieval periods (AD 100–800) and from the Early Middle Ages to the Early Modern Times (AD 800–1600). Results show that around 67.6% of the modelled early-medieval routes in the Netherlands are persistent with routes in the Roman period. Covering a much larger surface area of the Netherlands, 24.5% of the early-modern routes show a clear persistence with their early-medieval counterparts. Besides the differences in surface area, this downfall can largely be explained by cultural dynamics, with 71.4% of the early-modern route network following modelled movement corridors already in existence during the Early Middle Ages.     

Externalities,Learning and Governance: New Perspectives on Local Economic Development

In spite of growing mobility of production and production factors, economic development is increasingly localized in economic agglomerations. This article reviews three partially overlapping perspectives on local economic development, which derive from three factors intensifying the localized nature of economic development: externalities, learning and governance. Externalities play a central role in the new geographical economics of Krugman and in new economic geography of clusters and industrial districts. The dynamics of local economic development are increasingly associated with evolutionary economic thinking in general and with collective learning in particular. Inter‐firm and extra‐firm organization has experienced considerable innovation in the last few decades. New institutional devices are based on the notions of commodity chain, cluster and milieu. These innovations introduce new issues of economic governance both at the level of industry and of territory.     

The Modern Presidency and Theories of Accountability: Old Wine and Old Bottles

This study attempts to reconcile two apparently conflicting characteristics of congressional voting–stability in congressional decisionmaking and efforts to influence change in congressional voting decisions–by developing a concept and measurement of congressional voting response to short-term forces. The analysis indicates that congressional members do occasionally deviate from established policy positions on a subset of votes in response to the President of their party. In general, congressional members are more likely to deviate from their general policy positions when the policy area is characterized by change.     

The Land that Disappeared: Forceful Occupation,Disputes and the Negotiation of Landlord Power in a Bangladeshi Bastee

Through the lens of the ‘disappearance’ of a piece of land, this article analyses land relations in a Bangladeshi bastee (slum). The author builds an understanding of the local negotiation of ownership in an area where dakhal (forceful occupation) is the main starting point for the assessment of ownership. The property regime in the bastee emerges out of a web of relationships between different landlords, strongmen, elected officials and (local and national) politicians. These relations are not only crucial for maintaining existing dakhal patterns, but also for guaranteeing land sales, negotiating and settling disputes and, in the final instance, for negotiating power relations in the bastee itself.