Cross-border migration brings economic and cultural impacts to the origin and destination, and is also a key to reflect the international relations of related countries. In fact, the migration relationships of countries are complex and multilateral, but most traditional migration models are bilateral. Network theories could provide a better description of global migration to show the structure and statistical characteristics more clearly. Based on the estimated migration data and disparity filter algorithm, the networks describing the global multilateral migration relationships has been extracted among 200 countries over fifty years. The results show that the global migration networks during 1960-2015 exhibit a clustering and disassortative feature, implying globalized and multipolarized changes of migration during these years. The networks were embed into a Poincaré disk, yielding a typical and hierarchical "core-periphery" structure which, associated with angular density distribution, has been used to describe the "multi-centering" trend since 1990s. Analysis on correlation and evolution of communities indicates the stability of most communities yet some structural changes still exist since 1990s, which reflect that the important historical events are contributable to regional and even global migration patterns.
User-generated family trees are invaluable for constructing population-scale family networks and studying population dynamics over many generations and far into the past. Family trees contain information on individuals such as birth and death places and years, and kinship ties, e.g., parent-child, spouse, and sibling relationships. Such information about individuals in family trees makes it possible to extract migration networks over time. Despite the recent advances, existing spatial and temporal abstraction techniques for time-variant flow data have limitations due to the lack of knowledge o…
Data normalization for removing the influence of population density in Population Geography is a common procedure that may come with an unperceived risk. In this regard, data are constrained to a constant sum and they are therefore not independent observations, a fundamental requirement for applying standard multivariate statistical tools. Compositional Data (CoDa) techniques were developed to solve the issues that the standard statistical tools have with close data (i.e., spurious correlations, predictions outside the range, and sub-compositional incoherence) but they are still not commonly u…
Lyles School of Civil Engineering, Purdue University（普渡大学莱尔斯土木工程学院）；Agronomy Department, Purdue University（普渡大学农学系）；Institut de Physique Théorique, CEA, CNRS-URA 2306（法国原子能和替代能源委员会/法国国家科学研究中心理论物理研究所）；Centre d’Analyse et de Mathématique Sociales, CNRS/EHESS（法国国家科学研究中心/高等社会科学学院社会分析与数学中心）
Modeling the effects of natural disasters, wars, and migrations on sustainability or collapse of pre-industrial societies: Random perturbations of the Human and Nature Dynamics (HANDY) model
Populations composed of a collection of subpopulations (demes) with random migration between them are quite common occurrences. The emergence and sustenance of cooperation in such a population is a highly researched topic in the evolutionary game theory. If the individuals in every deme are considered to be either cooperators or defectors, the migration dilemma can be envisaged: The cooperators would not want to migrate to a defector-rich deme as they fear of facing exploitation; but without migration, cooperation can not be established throughout the network of demes. With a view to studying …
Differences in the social and economic environment across countries encourage humans to migrate in search of better living conditions, including job opportunities, higher salaries, security and welfare. Quantifying global migration is, however, challenging because of poor recording, privacy issues and residence status. This is particularly critical for some classes of migrants involved in stigmatised, unregulated or illegal activities. Escorting services or high-end prostitution are well-paid activities that attract workers all around the world. In this paper, we study international migration …
