***** To join INSNA, visit http://www.insna.org ***** selected abstracts Barry Wellman _______________________________________________________________________ FRSC NetLab Network INSNA Founder Dept of Communication & New Media National University of Singapore University of Toronto Toronto Canada http://www.chass.utoronto.ca/~wellman twitter: @barrywellman NETWORKED:The New Social Operating System. Lee Rainie & Barry Wellman MIT Press http://amzn.to/zXZg39 Print $15 Kindle $9 Old/NewCyberTimes http://bit.ly/c8N9V8 Happy Year of the Horned Hairy Fluffy Ruminant ________________________________________________________________________ Settlement scaling and increasing returns in an ancient society A key property of modern cities is increasing returns to scale˙˙the finding that many socioeconomic outputs increase more rapidly than their population size. Recent theoretical work proposes that this phenomenon is the result of general network effects typical of human social networks embedded in space and, thus, is not necessarily limited to modern settlements. We examine the extent to which increasing returns are apparent in archaeological settlement data from the pre-Hispanic Basin of Mexico. We review previous work on the quantitative relationship between population size and average settled area in this society and then present a general analysis of their patterns of monument construction and house sizes. Estimated scaling parameter values and residual statistics support the hypothesis that increasing returns to scale characterized various forms of socioeconomic production available in the archaeological record and are found to be consistent with key expectations from settlement scaling theory. As a consequence, these results provide evidence that the essential processes that lead to increasing returns in contemporary cities may have characterized human settlements throughout history, and demonstrate that increasing returns do not require modern forms of political or economic organization. Settlement scaling and increasing returns in an ancient society Scott G. Ortman, Andrew H. F. Cabaniss, Jennie O. Sturm, Luís M. A. Bettencourt Science Advances 01 Feb 2015: Vol. 1 no. 1 e1400066 http://dx.doi.org/10.1126/sciadv.1400066 ; See it on Scoop.it (http://www.scoop.it/t/papers/p/4037873662/2015/02/28/settlement-scaling-and-increasing-returns-in-an-ancient-society) , via Papers (http://www.scoop.it/t/papers) Sex redefined The idea of two sexes is simplistic. Biologists now think there is a wider spectrum than that. http://www.nature.com/news/sex-redefined-1.16943 See it on Scoop.it (http://www.scoop.it/t/papers/p/4038090385/2015/02/26/sex-redefined) , via Papers (http://www.scoop.it/t/papers) The Heterogeneous Dynamics of Economic Complexity What will be the growth of the Gross Domestic Product (GDP) or the competitiveness of China, United States, and Vietnam in the next 3, 5 or 10 years? Despite this kind of questions has a large societal impact and an extreme value for economic policy making, providing a scientific basis for economic predictability is still a very challenging problem. Recent results of a new branch˙˙Economic Complexity˙˙have set the basis for a framework to approach such a challenge and to provide new perspectives to cast economic prediction into the conceptual scheme of forecasting the evolution of a dynamical system as in the case of weather dynamics. We argue that a recently introduced non-monetary metrics for country competitiveness (fitness) allows for quantifying the hidden growth potential of countries by the means of the comparison of this measure for intangible assets with monetary figures, such as GDP per capita . This comparison defines the fitness-income plane where we observe that country dynamics presents strongly heterogeneous patterns of evolution. The flow in some zones is found to be laminar while in others a chaotic behavior is instead observed. These two regimes correspond to very different predictability features for the evolution of countries: in the former regime, we find strong predictable pattern while the latter scenario exhibits a very low predictability. In such a framework, regressions, the usual tool used in economics, are no more the appropriate strategy to deal with such a heterogeneous scenario and new concepts, borrowed from dynamical systems theory, are mandatory. We therefore propose a data-driven method˙˙ the selective predictability scheme ˙˙in which we adopt a strategy similar to the methods of analogues , firstly introduced by Lorenz, to assess future evolution of countries. by Matthieu Cristelli , Andrea Tacchella, Luciano Pietronero See it on Scoop.it (http://www.scoop.it/t/papers/p/4037877877/2015/02/24/the-heterogeneous-dynamics-of-economic-complexity) , via Papers (http://www.scoop.it/t/papers) Link removal for the control of stochastically evolving epidemics over networks: A comparison of approaches For many communicable diseases, knowledge of the underlying contact network through which the disease spreads is essential to determining appropriate control measures. When behavior change is the primary intervention for disease prevention, it is important to understand how to best modify network connectivity using the limited resources available to control disease spread. We describe and compare four algorithms for selecting a limited number of links to remove from a network See it on Scoop.it (http://www.scoop.it/t/papers/p/4037456978/2015/02/24/link-removal-for-the-control-of-stochastically-evolving-epidemics-over-networks-a-comparison-of-approaches) , via Papers (http://www.scoop.it/t/papers) Indirect reciprocity with optional interactions Indirect reciprocity means that my behavior towards you also depends on what you have done to others. Indirect reciprocity is associated with the evolution of social intelligence and human language. Most approaches to indirect reciprocity assume obligatory interactions, but here we explore optional interactions. See it on Scoop.it (http://www.scoop.it/t/papers/p/4037456827/2015/02/23/indirect-reciprocity-with-optional-interactions) , via Papers (http://www.scoop.it/t/papers) A Course on Cooperative Game Theory (by Satya R. Chakravarty et al.) Cooperative game theory deals with situations where objectives of participants of the game are partially cooperative and partially conflicting. It is in the interest of participants to cooperate in the sense of making binding agreements to achieve the maximum possible benefit. When it comes to distribution of benefit/payoffs, participants have conflicting interests. Such situations are usually modelled as cooperative games. While the book mainly discusses transferable utility games, there is also a brief analysis of non-transferable utility games. Alternative solution concepts to cooperative game theoretic problems are presented in chapters 1-9 and the next four chapters present issues related to computations of solutions discussed in the earlier chapters. The proofs of all results presented in the book are quite explicit. Additionally the mathematical techniques employed in demonstrating the results will be helpful to those who wish to learn application of mathematics for solving problems in game theory. See it on Scoop.it (http://www.scoop.it/t/cxbooks/p/4037338185/2015/02/23/a-course-on-cooperative-game-theory-by-satya-r-chakravarty-et-al) , via CxBooks (http://www.scoop.it/t/cxbooks) Network structure beyond food webs: mapping non-trophic and trophic interactions on Chilean rocky shores Chilean Marine Ecological Network See it on Scoop.it (http://www.scoop.it/t/papers/p/4037684756/2015/02/23/network-structure-beyond-food-webs-mapping-non-trophic-and-trophic-interactions-on-chilean-rocky-shores) , via Papers (http://www.scoop.it/t/papers) ============================================== Sponsored by the Complex Systems Society. Founding Editor: Gottfried Mayer. Editor-in-Chief: Carlos Gershenson. 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