Causality Modeling and Statistical Generative Mechanisms

Author(s):  
Igor Mandel
Author(s):  
Ilaria Geddes ◽  
Nadia Charalambous

This project was developed as an attempt to assess the relationship between different morphogenetic processes, in particular, those of fringe belt formation as described by M.R.G. Conzen (1960) and Whitehand (2001), and of centrality and compactness as described by Hillier (1999; 2002). Different approaches’ focus on different elements of the city has made it difficult to establish exactly how these processes interact or whether they are simply different facets of development reflecting wider socio-economic factors. To address this issue, a visual, chronological timeline of Limassol’s development was constructed along with a narrative of the socio-economic context of its development.  The complexity of cities, however, makes static visualisations across time difficult to read and assess alongside textual narratives. We therefore took the step of developing an animation of land use and configurational analyses of Limassol, in order bring to life the diachronic analysis of the city and shed light on its generative mechanisms. The video presented here shows that the relationship between the processes mentioned above is much stronger and more complex than previously thought. The related paper explores in more detail the links between fringe belt formation as a cyclical process of peripheral development and centrality as a recurring process of minimisation of gains in distance. The project’s outcomes clearly show that composite methods of visualisations are an analytical opportunity still little exploited within urban morphology. References Conzen, M.R.G., 1960. Alnwick, Northumberland: A Study in Town-Plan Analysis, London: Institute of British Geographers. Hillier, B., 2002. A Theory of the City as Object: or how spatial laws mediate the social construction of urban space. Urban Des Int, 7(3–4), pp.153–179. Hillier, B., 1999. Centrality as a process: accounting for attraction inequalities in deformed grids. Urban Des Int, 4(3–4), pp.107–127. Whitehand, J.W.R., 2001. British urban morphology: the Conzenian tradition. Urban Morphology, 5(2), pp.103–109.


Author(s):  
Abbas Farasoo

Abstract This paper explores the question of what drives proxy alignment in war and argues that current proxy war scholarship needs further thinking to go beyond focusing on the principal–agent theory and individual actors’ motivation analysis. Rather, there is a need to look at the generative mechanisms of proxy alignment as a process that constitutes patterns of friend–enemy relations. The paper argues securitization patterns from domestic to regional and international levels drive actors to re-evaluate their positions and define their enemies and friends. This is a process of securitization alignment and confluence, which serves as a generative mechanism for proxy alignment in a conflict. Securitization alignment is based on a convergence of securitizations by different actors that create a friend–enemy dynamic and convergence of security interests between actors. The confluence of securitizations from the domestic level to regional and beyond also connects actors across different levels to be in alignment and impact the conflict.


2021 ◽  
pp. 41-64
Author(s):  
Priscilla Alderson

Chapter 2 sets out basic critical realism concepts to show how they help to resolve the problems examined in Chapter 1. The concepts or themes include: the need to separate ontology-being from epistemology-thinking; the transitive and intransitive; the semiotic triangle; open and closed systems and demi-regs; the possibility of naturalism; natural necessity or the three levels of reality, the empirical, actual and real; a detailed example of the three levels in Mexican neonatal research; retroduction; creative power1 and coercive power2; time sequencing; political economy; the search for generative mechanisms; dichotomies, and policy.


2007 ◽  
Vol 48 (1) ◽  
pp. 3-53 ◽  
Author(s):  
Gianluca Manzo

A theoretical model is presented that aims to explain the generative mechanisms of educational stratification. The rational educational choice of the Ego is supposed to be influenced by the choices of others. The model explores various forms of direct and indirect interdependent choices between actors. In order to demonstrate the empirical consequences, use is made of an artificial society built upon a “multi agents” computational approach. The dynamic of this virtual society is proved to fit well with empirical French and Italian data from an absolute point of view (distribution of diplomas) as well as a relative one (educational opportunities).


2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Javier García-Algarra ◽  
Mary Luz Mouronte-López ◽  
Javier Galeano

AbstractThe World Trade Network (WTN) is a network of exchange flows among countries whose topological and statistical properties are a valuable source of information. Degree and strength (weighted degree) are key magnitudes to understand its structure and generative mechanisms. In this work, we describe a stochastic model that yields synthetic networks that closely mimic the properties of annual empirical data. The model combines two popular mechanisms of network generation: preferential attachment and multiplicative process. Agreement between empirical and synthetic networks is checked using the available series from 1962 to 2017.


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