This short article is about the use of the notion of attention in 3 different cases. The goal is to understand that the notion of attention is a transversal notion, interesting not only for a cognition point of view, at the individual level but also that may have an impact in the design of models in other fields, at the macro level. This post gives very roughly the insight of 3 attention-related papers in 3 different fields: attention in economics, attention in sociology, attention in information system.If you’re interested by the lecture I suggest you to read the original sources. Furthermore this article can be completed with a 4th case in a former post (in French) about an organizational theory-based view of Digg.com, a social news aggregator.
For the first case, I will mention the most obvious case: the problem of information overload we have from decades and the fact that information system designers still don’t react to this trend. David A. Bray  pointed out the (not new) analogy between information overload and environment ecological problem. “ Similar to the limits of Earth’s “environmental load” with regard to human-made pollution, some of the technologies we have built have led (unforeseeably) to increased information pollution. This pollution is beginning to manifest itself in terms of lost productivity, additional work hours, and decline in true “vacation” times disconnected from work. [..] Business leaders implementing technology solutions also have an obligation to balance corporate technology use and priorities with the innate emotional need among all employees for time with nature and with friends, free of technological distractions.”
As Herb Simon, the first one predicting the information overload problem several decades before, noted in 1996 : . ” …many designers of information systems incorrectly represented their design problem as information scarcity rather than attention scarcity, and as a result they built systems that excelled at providing more and more information to people, when what was really needed were systems that excelled at filtering out unimportant or irrelevant information”
Global & local diversities of attention producers in an attention market
In the economic theory field, and more specifically about the attention economy (see the below note for people who don’t know the concept) Falkinger has recently produced a model describing the competition among attention producers  (a former interesting paper  characterizes a rich-information environment). He focused his study on the producer side, the signal’s sender, rather than the user side, the receiver. According to his psychological model and the fact that only senders that achieve a non null impact on receiver’s attention will survive, he demonstrated how a wider diffusion of signals among a population can diminish the equilibrium number of senders, despite the fact that the receivers has access to a larger variety of senders than before. So the global diversity of senders decreases but the local diversity, the number of senders perceived by receivers, increases. This change is due to the ability of the few surviving companies to increase their radiation capacities, the maximum numbers of reachable receivers (thanks to different factors: cheaper signal production, more effective methods of impact generation, but also international integration i.e. their radiation going beyond local areas).
Note about attention economy: Nowadays, in a Information-rich world, the information is not a scarce resource. But Information still consumes a limited resource , the receiver’s attention. thus Attention is a valuable resource and a competition will emerge between the information producers to get the consumers’ attention. for more information check wikipedia
influence & opinion formation in an social network
For the sociological view (well “socio-physics”, because the paper is written by a physicist and have no real sociological consideration), J. O. Indekeu proposed an opinion formation model based on the hypothesis that, in a social network, the influence of a person on his/her contacts is inversely proportional to the size of his contacts. “questionable whether a node, e.g., a person, with many partners (i.e., nodes to which he/she is linked) is able to influence all these partners as strongly as a person with only a few partners would be able to do. An intensive person-to-person discussion presumably creates a stronger tendency to form a durable common opinion than a one-to-many communication”.
Even if the model is a hypothesis (as a lot in sociophysics) and haven’t be validated by experimental data, it’s still interesting to note the idea of Indekeu about the introduction of an attention aspect in an Ising model for modeling opinion formation. His Special Attention Network presented attenuates the strong influence exerted by highly connected people in networks by introducing a detailed local compensation of high connectivity by weak interaction.
 Post sur mon blog “Vision attentionnelle de Digg.com”
 Indekeu (2003), “Special Attention Network”, Available at Arxiv: http://arxiv.org/abs/physics/0310113
 Falkinger (2005) “Limited attention as the scarce resource in an information-rich economy” Discussion Paper IZA, 1538 . Available http://papers.ssrn.com/sol3/papers.cfm?abstract_id=695205
 Falkinger (2007) “Attention economies,” Journal of Economic Theory, Elsevier, vol. 127(1), pages 266-294, March. Available at http://ideas.repec.org/p/ces/ceswps/_1079.html
 Bray (2007)., “Conceptualizing Information Systems and Cognitive Sustainability in 21st Century ‘Attention’ Economies“. Piedmont Project Available at SSRN: http://ssrn.com/abstract=991165
 Simon, H. A. (1996), The Sciences of the Artificial (3rd ed.), The MIT Press