Small Worlds


Book Description

Everyone knows the small-world phenomenon: soon after meeting a stranger, we are surprised to discover that we have a mutual friend, or we are connected through a short chain of acquaintances. In his book, Duncan Watts uses this intriguing phenomenon--colloquially called "six degrees of separation"--as a prelude to a more general exploration: under what conditions can a small world arise in any kind of network? The networks of this story are everywhere: the brain is a network of neurons; organisations are people networks; the global economy is a network of national economies, which are networks of markets, which are in turn networks of interacting producers and consumers. Food webs, ecosystems, and the Internet can all be represented as networks, as can strategies for solving a problem, topics in a conversation, and even words in a language. Many of these networks, the author claims, will turn out to be small worlds. How do such networks matter? Simply put, local actions can have global consequences, and the relationship between local and global dynamics depends critically on the network's structure. Watts illustrates the subtleties of this relationship using a variety of simple models---the spread of infectious disease through a structured population; the evolution of cooperation in game theory; the computational capacity of cellular automata; and the sychronisation of coupled phase-oscillators. Watts's novel approach is relevant to many problems that deal with network connectivity and complex systems' behaviour in general: How do diseases (or rumours) spread through social networks? How does cooperation evolve in large groups? How do cascading failures propagate through large power grids, or financial systems? What is the most efficient architecture for an organisation, or for a communications network? This fascinating exploration will be fruitful in a remarkable variety of fields, including physics and mathematics, as well as sociology, economics, and biology.




The Small Worlds of Corporate Governance


Book Description

An empirically rich study of the influence of social networks on corporate governance across countries and the emergence of a new transnational community. The financial crisis of 2008 laid bare the hidden network of relationships in corporate governance: who owes what to whom, who will stand by whom in times of crisis, what governs the provision of credit when no one seems to have credit. This book maps the influence of these types of economic and social networks—communities of agents (people or firms) and the ties among them—on corporate behavior and governance. The empirically rich studies in the book are largely concerned with mechanisms for the emergence of governance networks rather than with what determines the best outcomes. The chapters identify “structural breaks”—privatization, for example, or globalization—and assess why powerful actors across countries behaved similarly or differently in terms of network properties and corporate governance. The chapters examine, among other topics, the surprisingly heterogeneous network structures that contradict the common belief in a single Anglo-Saxon model; the variation in network trajectories among the formerly communist countries including China; signs of convergence in response to the common structural breaks in Europe; the growing structural power of women due to gains in gender diversity on corporate governance in Scandinavia; the “small world” of merger and acquisition activity in Germany and the United States; the properties of a global and transnational governance network; and application of agent-based models to understanding the emergence of governance.




Recent Advances in Simulated Evolution and Learning


Book Description

This book covers the latest advances in the theories, algorithms, and applications of simulated evolution and learning techniques. It provides insights into different evolutionary computation techniques and their applications in domains such as scheduling, control and power, robotics, signal processing, and bioinformatics. The book will be of significant value to all postgraduates, research scientists and practitioners dealing with evolutionary computation or complex real-world problems.




Evolution of Networks


Book Description

We live in a world of networks, where everything is amazingly close to everything else. The notion of 'network' turns out to be central to our times: the Internet and WWW are changing our lives; our physical existence is based on various biological networks; we are involved in all-enveloping networks of economic and social relations. Only in the 1990s did physicists begin to explore real networks, both natural and artificial, as evolving systems with intriguingly complex and effective architectures. Progress has been so immediate and astounding that we actually face a new science based on a new set of concepts, and, one may even say, on a new philosophy: the natural philosophy of a small world. Old ideas from mathematics, statistical physics, biology, computer science, and so on take on quite new forms in applications to real evolving networks. - What is common to all networks? - What are the general principles of the organization and evolution of networks? - How do the laws of nature work in communication, biological, and social networks? - What are networks? This book, written by physicists, answers these questions and presents a general insight into the world of networks.




Maritime Networks in the Mycenaean World


Book Description

This book is a new analysis of maritime life among the Mycenaean Greeks (ca. 1600-1100 BC). Whereas long-distance trade with Egypt or Cyprus has received much attention, the locations of Mycenaean harbors are virtually unknown and local maritime networks have been largely ignored. The main purpose of the book is to provide concepts and methods for recovering lost harbors and short-range maritime networks, using information from ship construction, coastal paleoenvironments, oral histories, texts including Homer, and archaeological fieldwork. The book is intended for all those with interests in maritime connectivity in the past.




Evolution and Rationality


Book Description

This volume explores from multiple perspectives the subtle and interesting relationship between the theory of rational choice and Darwinian evolution. In rational choice theory, agents are assumed to make choices that maximize their utility; in evolution, natural selection 'chooses' between phenotypes according to the criterion of fitness maximization. So there is a parallel between utility in rational choice theory and fitness in Darwinian theory. This conceptual link between fitness and utility is mirrored by the interesting parallels between formal models of evolution and rational choice. The essays in this volume, by leading philosophers, economists, biologists and psychologists, explore the connection between evolution and rational choice in a number of different contexts, including choice under uncertainty, strategic decision making and pro-social behaviour. They will be of interest to students and researchers in philosophy of science, evolutionary biology, economics and psychology.




Settlement, Society and Cognition in Human Evolution


Book Description

This volume provides a landscape narrative of early hominin evolution, linking conventional material and geographic aspects of the early archaeological record with wider and more elusive social, cognitive and symbolic landscapes. It seeks to move beyond a limiting notion of early hominin culture and behaviour as dictated solely by the environment to present the early hominin world as the outcome of a dynamic dialogue between the physical environment and its perception and habitation by active agents. This international group of contributors presents theoretically informed yet empirically based perspectives on hominin and human landscapes.




Foundations of Economic Evolution


Book Description

ÔThis book is an ambitious intellectual enterprise to build a naturalistic foundation for economics, with amazingly vast knowledge of physical, biological, social sciences and philosophy. Readers will discover that approaches and insights emergent in institutional studies, (social)-neuroscience, network theory, ecological economics, bio-culture dualistic evolution, etc. are persuasively placed in a grand unified frame. It is written in a good Hayekian tradition. I recommend this book particularly to young readers who aspire to go beyond a narrowly specified discipline in the age of expanding communicability of knowledge and ideas.Õ Ð Masahiko Aoki, Stanford University, US ÔCarsten Herrmann-PillathÕs new book is an in-depth application of natural philosophy to economics that draws up an entirely new framework for economic analysis. It offers path-breaking insights on the interactions between human economic activity and nature and outlines a convincing solution to the long-standing reductionism controversy. A must-read for everyone interested in the philosophical underpinnings of economics as a science.Õ Ð Ulrich Witt, Max Planck Institute of Economics, Jena, Germany ÔÒBig pictureÓ philosophy of economics drifted into a dull cul-de-sac as it became obsessively focused on falsifiability and rationality. In this book Carsten Herrmann-Pilath pushes the field back onto the open highway by locating economics in the larger frameworks of metaphysics, evolutionary dynamics and information theory. This is large-scale, ambitious synthesis of ideas of the kind we expect from time to time to see devoted to physics and biology. Why should economics merit anything less? But of course this kind of intellectual tapestry must await the appearance of an unusually devoted scholar with special patience and eccentric independence from the pressure for quick returns that characterizes academic life. In the person of Hermann-Pilath this scholar has appeared. No one who wants to examine economics whole and in its richest context should miss his virtuoso performance in this book.Õ Ð Don Ross, University of Cape Town, South Africa and Georgia State University, US ÔHerrmann-PillathÕs work attempts to bring to bear upon the discipline of economics perspectives from other discourses which have been burgeoning recently Ð namely, thermodynamics, evolutionary biology, and semiotics, aiming at a consilience contextualized by economic activity and problems. This marks the work as a contemporary example of natural philosophy, which is now at the doorstep of a revival. The overall perspective is that human economic activity is an aspect of the ecology of the earthÕs surface, viewing it as an evolving physical system mediated through distributed mentality as expressed in technology evolution. Knowledge is taken to be ÔphysicalÕ with a performative function, as in PeirceÕs pragmaticism. Thus, the social meanings of expectations, prices, and credit are found to be rooted in energy flows. The work draws its foundation from Hegel and C.S. Peirce and its immediate guidance from Hayek, Veblen and Georescu-Roegen. The author generates an energetic theory of economic growth, guided by OdumÕs maximum power principle. Economic discourse itself is reworked in the final chapter, in light of the examinations of the previous chapters, naturalizing economics within an extremely powerful contemporary framework.Õ Ð Stanley N. Salthe, Binghamton University, US ÔAn Oscar-winning performance in the Òtheatre of consilience.Ó ItÕs hard to know which to praise first: Carsten Herrmann-PillathÕs humility or his ambition. He says his book Òis not a great intellectual featÓ because he pursues the Òhumble taskÓ of putting together Òthe ideas of others.Ó When he finally gets to economics he tries to Òbe as simple as possibleÓ and to conceive of economics in terms of the basics, at Òundergraduate level, so to say.Ó On the other hand, the scale of his ambition is to rethink the foundations of economics from first principles, while, at the same time, holding a running dialogue between contemporary sciences and classic philosophy. HeÕs much too modest, of course, because Foundations is a major achievement, but his modesty points to what makes it such a powerful treatise: the book is not about his preferences or prejudices; it is a Òscientific approach that aims at establishing truthful propositions about reality.Ó That is much harder to achieve than grand theories or Òcomplicated mathematics,Ó because it amounts to a new modern synthesis of the field Ð an achievement on a par with Julian HuxleyÕs, whose own modern synthesis of evolutionary theories in the 1940s allowed for the explosive growth of the biosciences over the next decades. The structure of the book is simple enough, providing a framework for the Ònaturalistic turnÓ in economics. Starting from material existence, causation and evolution, Herrmann-Pillath takes us through four fundamental concepts Ð individuals, networks, institutions and technology Ð before coming finally to the Òrealm of economics proper,Ó i.e. markets. However, Herrmann-Pillath believes that the Òfoundations of economics cannot be found within economicsÓ but only in dialogue with other sciences, or what he calls the Òtheatre of consilience.Ó ItÕs a theatre in which various characters come and go, where dialogue ebbs and flows, conflicts arise and are resolved, and where individual actions can be seen as concepts as, leading to higher levels of meaning as the plot unfolds. The magic of theatre, of course, is that the point of intelligibility, where the characters, actions and narrative resolve into meaningfulness, is projected out of the drama itself, into the spectator. ThatÕs you, dear reader. So it is with economics as a discipline. Economics is a player in a much larger performance about what constitutes knowledge, and how we know that. It is also a player in the economy it seeks to explain. To understand why money, firms, growth, prices, markets and other staples of economic thought emerge and function the way they do, it is necessary situate the analysis beyond economics (and the economy), and to engage with developments across the human, evolutionary and complexity sciences. This is what Herrmann-Pillath does, analyzing a breathtaking range of illuminating and sometimes challenging work along the way. We are treated to new ideas about the externalized brain, the evolution of knowledge in the Earth System (i.e. not just among humans), the role of signs and performativity in these processes, as well as that of Òenergetic transformations.Ó But Herrmann-Pillath is not satisfied with the ÒmodestÓ task of bringing the best of modern scientific thought to bear on economic concepts and performances; he really does harbor a deeper purpose. The clue is in his apparently quixotic desire to hang on to philosophical insights associated with pre-evolutionary thinkers like Aristotle and Hegel, and his apparently eccentric desire to place the semiotic philosophy of C.S. Pierce at center stage. But the patient observer will see that he is not seeking to change the facts by imposing idealist notions on them after the event. Instead, he is arguing for a change in the way we perform ourselves in the face of these facts. He is looking for a modern-day equivalent of Confucius or Socrates: one who can imagine values and beliefs that Òdefine the human species in a new way.Ó For those who have eyes to see, as the drama unfolds, it may be that we have found such a figure in Carsten Herrmann-Pillath himself, modesty, ambition and all. This is ÒCultural ScienceÓ as it should be done.Õ Ð John Hartley, Curtin University, Australia and Cardiff University, UK




Evolving Transportation Networks


Book Description

Over the last two centuries, the development of modern transportation has significantly transformed human life. The main theme of this book is to understand the complexity of transportation development and model the process of network growth including its determining factors, which may be topological, morphological, temporal, technological, economic, managerial, social or political. Using multidimensional concepts and methods, the authors develop a holistic framework to represent network growth as an open and complex process with models that demonstrate in a scientific way how numerous independent decisions made by entities such as travelers, property owners, developers, and public jurisdictions could result in a coherent network of facilities on the ground. Models are proposed from innovative perspectives including self-organization, degeneration, and sequential connection to interpret the evolutionary growth of transportation networks in explicit consideration of independent economic and regulatory initiatives. Employing these models, the authors survey a series of topics ranging from network hierarchy and topology to first mover advantage. The authors demonstrate, with a wide spectrum of empirical and theoretical evidence, that network growth follows a path that is not only logical in retrospect, but also predictable and manageable from a planning perspective. In the larger scheme of innovative transportation planning, this book provides a re-consideration of conventional planning practice and sets the stage for further development on the theory and practice of the next-generation, evolutionary planning approach in transportation, making it of interest to scholars and practitioners alike in the field of transportation .




Adaptation And Evolution In Collective Systems


Book Description

Self-contained and unified in presentation, this invaluable book provides a broad introduction to the fascinating subject of many-body collective systems with adapting and evolving agents. The coverage includes game theoretic systems, multi-agent systems, and large-scale socio-economic systems of individual optimizing agents. The diversity and scope of such systems have been steadily growing in computer science, economics, social sciences, physics, and biology.