World City Network Research Research Articles

Not Chicago: voids in world city network formation

ABSTRACT This paper addresses some of the putative limitations of world city network research, which has often focused on producing “maps” of cities that are well-connected in the office networks of globalized producer services firms. We retain the data and model, but extend the conceptual focus and methodological toolkit by (1) disaggregating the network in its key geographical components and (2) focusing on notable absences in some of these geographies. The purpose of this paper, therefore, is to discuss some of the notable voids in the myriad processes that constitute world city network formation. Using data on the office networks of 175 producer services firms across 707 cities, we first focus on the surprising case of Chicago and subsequently deal with a total of 21 world city network voids. The paper is concluded with a discussion of theoretical implications and the relevance for the broader literature on global urban studies.

Three Globalizations Shaping the Twenty-first Century: Understanding the New World Geography through Its Cities

In this article we attempt to understand the new world geography through its cities by treating corporate globalization from the perspective of cities insofar as they are central to the global networks that make large-scale economic processes possible. To this end, we draw on a conceptual and empirical extension of world city network research to describe the major globalization phases that have been shaping the twenty-first century. After situating our world city network research in the much broader field of research on globalizing cities, we retell the narrative of the extensive, intensive, and Chinese globalization phases as reflected in the office networks of 175 of the world’s largest producer services firms across 707 cities. A purposeful combination of connectivity and multivariate analysis is used to reveal cumulative, interacting, overlapping, and unfolding geographies of global economic patterns. We argue that these three key globalizations are shaping the global context of economic processes in the twenty-first century and describe the urban geography of each of these globalizations to understand their broader meanings within today’s global economy.

Critiquing Construct Validity in World City Network Research: Moving from Office Location Networks to Inter‐Organizational Projects in the Modeling of Intercity Business Flows

The interlocking world city network model and other office location approaches (OLAs) have become the most widely used empirical models of the world city network (WCN). Despite numerous methodological improvements, they continue to rely on a legacy of using data on office locations of firms to indirectly estimate intercity business flows. To advance the dialogue about how to improve on existing empirical models of the WCN, we examine the content, construct and structural validity of OLAs. We analyze the link between the theoretical construct of intercity business flows and network projections obtained from office location data and uncover evidence that calls into question the validity of OLAs as empirical models of the WCN. In the spirit of no deconstruction without reconstruction, we then develop an alternative empirical model of the WCN, based on directly observable relational ties among APS firms, which are formed through co‐production of complex services. We call this the inter‐organizational project approach (IOPA). We argue for IOPA's construct validity as an empirical model of the WCN and offer empirical evidence for its structural validity. We demonstrate it using a global sample of 161,114 investment bank syndicates in the 2000–2015 period.

Construct Validity in World City Network Research: From Office Location Networks to Inter-Organisational Projects in the Analysis of Intercity Business Flows

The Interlocking World City Network Model (IWCNM) and other office location approaches (OLAs) have become the most widely used empirical models of the world city network (WCN) over the last two decades. Despite numerous methodological improvements, they still rely on Taylor’s (2001) legacy of using data on office locations of firms to indirectly estimate intercity business flows. Notwithstanding criticism from both within the mainstream of the global and world cities research as well as postcolonial and poststructuralist geographers, OLAs maintain their dominant position in recently published research. To advance the dialogue on the appropriateness of OLAs as empirical models of WCN, we consider their construct validity by examining the link between theory and empirical models. We uncover evidence that calls into question the validity of OLAs for empirical modelling of intercity business flows. In the spirit of no deconstruction without reconstruction, we develop a new model based on directly observable business flows, which we call the inter-organisational project approach (IOPA). We deductively argue for IOPA’s construct validity as an empirical model of the WCN and offer empirical evidence for its structural validity. We demonstrate it using a global sample of 161,114 investment bank syndicates in the 2000 – 2015 period.

On the global city map, but not in command? Probing Manila’s position in the world city network

The changing geography of service employment and the relocation of back-office service tasks to developing economies present a challenge to contemporary world city network research and methodology, as cost-driven offshoring may wrongly suggest a city’s increased importance in global city rankings. In particular, financial service firms, but also management consultancies, law firms, and other advanced producer service firms have offshored tasks abroad. These firms’ offices are attributed a vital role in the world city network literature and form the basis for world city rankings using the interlocking network model. Based on empirical research on advanced producer service firms in Metro Manila, the Philippines, this paper argues that the existence of linkages and the appearance ‘on the map’ of dominant economic flows does not automatically lead to an increased command and control position of Manila. Instead, the attraction of lower-end services leads to Manila’s dependent articulation into global service production networks. The findings challenge the key assumptions about ‘command functions’ and ‘strategic role’ of global cities that underpin the global city rankings. The paper critiques current conceptualisations of command and control in global urban network theory in the light of changing intra-firm divisions of labour in advanced producer service firms, and stresses the importance of qualitative research.

Well connected compared to what? Rethinking frames of reference in world city network research

Claims about the strength of cities’ global connections have become commonplace in the world cities literature. Although such claims are inherently comparative, authors often do not specify the reference. London is well connected compared to what? In this paper, I adapt the stochastic degree sequence model from network analysis as a tool to derive a frame of reference that can be used to inform and substantiate such claims. Beyond providing a formal statistical method for deciding when the claim that “X is well connected” is justified, it also addresses a number of other challenges in this literature, including more explicitly casting firms as key agents in world city formation, providing insight into when and where global firms might be expected to locate their branch offices, and helping identify cases that warrant more detailed investigation. To illustrate, I apply the method to data on cities and firms from 2013, examining the results at five different scales, from the individual city and firm to the entire world city network. I conclude by considering how this approach allows researchers to ask different kinds of questions about the nature of world city status.

Spatialization of user-generated content to uncover the multirelational world city network

In this paper we tackle a fundamental and long-time challenge in urban geography, to uncover a functionally differentiated global city network. To this day, the empirical investigation of a global multifunctional city network remains a challenge given the scarcity of appropriate relational and multifunctional data sources. To overcome this research gap, we present an interdisciplinary network modelling approach that integrates methods from geographic information science with social network analysis, including automated semantic analyses.We apply our modelling framework to a globally available, user-generated database (ie, Wikipedia), still underutilized in urban geography and planning research. The proposed visual analytical investigation of the multifunctional world city network also includes a systematic evaluation to assess the robustness of the proposed approach, and the adequacy of crowd-sourced databases for scientific uses. By example, we discuss economical and political relations of a latent multifunctional global city network which we uncovered with our data-driven approach. Our results not only empirically replicate previously well-established world city network theory, but also generate new research questions about multiple functions of cities, as hypothesized in world city network research. Furthermore, we showcase the potential of coupling text-based user-generated data analysis with geovisual analytics for scientific investigations in urban studies.

World City Network Research at a Theoretical Impasse: On the Need toRe‐Establish Qualitative Approaches to Understanding Agency in World City Networks

AbstractFrom the late 1990s, the establishment of a new relational ‘turn’ in the study of world city connectedness in globalisation has run parallel to the wider relational turn occurring in economic geography. Early work, built firmly upon a qualitative approach to the collection and analyses of new intercity datasets, considered cities as being constituted by their relations with other cities. Subsequent research, however, would take a strong quantitative turn, best demonstrated through the articulation of the inter‐locking world city network (ILWCN) ‘model’ for measuring relations between cities. In this paper, we develop a critique of research based around theILWCNmodel, arguing that this ‘top down’ quantitative approach has now reached a theoretical impasse. To address this impasse, we argue for a move away from structural approaches in which the firm is the main unit of analysis, towards qualitative approaches in which individual agency and practice are afforded greater importance.

Does World City Network Research Need Eigenvectors?

In a 2011 paper, I introduced the conceptual distinction between positions of centrality and power in world city networks and offered a new measure—now called alter-based centrality—designed to quantify the network positions of cities. Here, I respond to some conceptual and mathematical critiques of those ideas raised by Boyd et al. (2013) in their Comment on Neal (2011). On the conceptual side, I clarify the definitions of centrality and power, the relevance of exchange power in world city networks and the appropriate depth of network measures in this context. On the mathematical side, I clarify the relationship between alter-based centrality and other measures, and explore the limitations of two alternatives: eigenvector and beta centrality. This Reply concludes by noting that each measure has its own strengths and weaknesses, but that researchers should aim to use measures that are no more complex than necessary.

Differentiating Centrality and Power in the World City Network

Centrality and power have become common foci for world city network research and frequently serve as tools for describing cities’ position or status in the system. However, these concepts are difficult to define and measure. Often they are treated as equivalent: more central cities have more power. This paper challenges this assumed equivalence by proposing conceptually distinct definitions and developing two new measures that allow them to be differentiated empirically. Applying the proposed measures in a hypothetical world city network and the Internet backbone network reveals that centrality and power are distinct and suggests that world cities should be viewed as arising from multidimensional network positions that define multiple types: quintessential world cities that are both central and powerful (such as New York and London), hub world cities that are central but not powerful (such as Washington and Brussels) and gateway world cities that are powerful but not central (such as Miami and Stockholm).