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ICES Research Colloquium: Prof. Dr. Emanuel Deutschmann (Sociology)

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Im Rahmen des ICES Research Colloquium hält Prof. Dr. Emanuel Deutschmann (Soziologie) einen Vortrag mit dem Titel: "Roads, Rails, and Checkpoints: Assessing the Permeability of Nation-State Borders Worldwide"

Abstract: The permeability of nation-state borders determines the flow of people and commodities between countries and has thus enormous influence on many aspects of human development from trade and economic inequality to migration and the ethnic composition of societies globally. While past research on the topic has focused on border fortification (walls, fences, etc.) or the legal dimension of border controls, the presented study takes a different approach. It argues that transport infrastructure (paths, roads, railroads, ferries) together with political checkpoints can be used as valuable indicators for the permeability of borders worldwide: More (and better) transport infrastructure increases permeability, whereas checkpoints create political capacity for reducing it. Using automatized computational methods combined with extensive manual checks, we parse data from OpenStreetMap and the World Food Programme to detect cross-border transport infrastructure and checkpoints. Based on this information, we define an index of border permeability for 312 land borders globally. Subsequent analyses show that independently of degree of closure enforcement at checkpoints, Europe and Africa have the most permeable and the Americas the least permeable borders worldwide. Regression models reveal that border permeability is higher in densely populated areas and that economic development, by far the most relevant explanatory factor, has a curvilinear relationship with border permeability: Borders of very rich and very poor countries are highly permeable, while those of moderately prosperous nation-states are significantly harder to cross. Implications of this remarkably clear pattern are discussed.

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