Despite its haphazard growth, the Web hides powerful underlying regularities--from the organization of its links to the patterns found in its use by millions of users. Many of these regularities have been predicted on the basis of theoretical models based on a field of physics--statistical...

The study of social interactions has enriched both the domain of inquiry of economists and the way economists conceptualize individual decision making. The review aims to introduce the classes of models that accommodate estimation of social interactions and to examine the key areas where...

Statistical mechanics proves useful when assessing the topology of many large-scale networks, including infrastructure. One objective would be to modify the pattern of capacity expansion inside a system. Airports are spatially distributed and they need to respond to potential demand that they...

Moral Foundation Theory states that groups of different observers may rely on partially dissimilar sets of moral foundations, thereby reaching different moral valuations. The use of functional imaging techniques has revealed a spectrum of cognitive styles with respect to the differential...

Today, Alchian's "Uncertainty, evolution and economic theory" (1950) is hailed by evolutionary economists as a most important piece, which resumed an evolutionary brand of theorizing in economics after the eclipse of the interwar period. On the other hand, Alchian's article is also cherished by...

Computational mechanics, an approach to structural complexity, defines a process's causal states and gives a procedure for finding them. We show that the causal-state representation--an e-machine--is the minimal one consistent with accurate prediction. We establish several results on e-machine...

We review various aspects of the notion ofscale applied to natural systems, in particularcomplex adaptive systems. We argue that scalingissues are not only crucial from the standpointof basic science, but also in many appliedissues, and discuss tools for detecting anddealing with multiple...