Are all film stars linked to Kevin Bacon? Why do the stock markets rise and fall sharply on the strength of a vague rumour? How does gossip spread so quickly? Are we all related through six degrees of separation? There is a growing awareness of the complex networks that pervade modern society. We see them in the rapid growth of the internet, the ease of global communication, the swift spread of news and information, and in the way epidemics and financial crises develop with startling speed and intensity. This introductory book on the new science of networks takes an interdisciplinary approach, using economics, sociology, computing, information science and applied mathematics to address fundamental questions about the links that connect us, and the ways that our decisions can have consequences for others.

Networks and Markets argues that economists' knowledge of markets and sociologists' rich understanding of networks can and should be combined. Together they can help us achieve a more coherent view of economic life, where transactions follow both the logic of economic incentives and the established channels of personal relationships. Market exchange is impersonal, episodic, and carried out at arm's length. All that matters is how much the seller is asking, and how much the buyer is offering. An economic network, by contrast, is based upon more personalized and enduring relationships between people tied together by more than just price. Networks and Markets focuses on how the two concepts relate to each other: Are social networks an essential precondition for successful markets, or do networks arise naturally out of markets, as faceless traders build reputations and gain confidence in each other? The book includes contributions by both sociologists and economists, applying the concepts of markets and networks to concrete empirical phenomena. Among the topics analyzed, the book explains how, in Taiwan, South Korea, and Japan, firms combine into tightly-knit business blocs, how wholesalers in a Marseille fish market earn the loyalty of customers, and how ethnic retailers in the U.S. share valuable market information with other shopkeepers from their ethnic group. A response to each chapter discusses the issue from the standpoint of the other discipline. Sociologists are challenged to go beyond small-scale economic exchange and to integrate their concept of networks into a broader understanding of the economic system as a whole, while economists are challenged to consider the economic implications of network ties, which can be strong or weak, unconditional or highly contingent. This book proves that both economics and sociology provide stronger insights when they study markets and networks as parallel forms of exchange. But it also clarifies the healthy division of labor that remains between the two disciplines. Sociologists are adept at showing how markets are framed by social institutions; economists specialize in explaining how markets perform, taking the social context as a given. Networks and Markets showcases what each discipline does best and reveals where each discipline would do better by borrowing from the other.

Describes how patterns of information, knowledge, and cultural production are changing. The author shows that the way information and knowledge are made available can either limit or enlarge the ways people create and express themselves. He describes the range of legal and policy choices that confront.

An overview of what networks are and how they are used in marketing management practices is provided in this volume. Leading scholars in the field examine various types of relationships including: customer-to-customer networks; relationships as investment opportunities; and strategic alliances. They also investigate market dynamics and structure and consumer networks. In conclusion, several advanced methodological issues and future research directions are examined. In addition to the main research chapters, key figures contribute their own reflections on the topic.

This volume looks at financial prediction from a broad range of perspectives. It covers: - the economic arguments - the practicalities of the markets - how predictions are used - how predictions are made - how predictions are turned into something usable (asset locations) It combines a discussion of standard theory with state-of-the-art material on a wide range of information processing techniques as applied to cutting-edge financial problems. All the techniques are demonstrated with real examples using actual market data, and show that it is possible to extract information from very noisy, sparse data sets. Aimed primarily at researchers in financial prediction, time series analysis and information processing, this book will also be of interest to quantitative fund managers and other professionals involved in financial prediction.

Understanding the political and socio-economic factors which give rise to youth recruitment into militant organizations is central to grasping some of the most important issues that affect the contemporary Middle East and Africa. In this book, Khalid Mustafa Medani explains why youth are attracted to militant organizations, examining the specific role economic globalization plays in determining how and why militant activists emerge. Based on extensive fieldwork, Medani offers an in-depth analysis of the impact of globalization, neoliberal reforms and informal economic networks on the rise and evolution of moderate and militant Islamist movements. In an original contribution to the study of Islamist and ethnic politics, he shows the importance of understanding when and under what conditions religious rather than other forms of identity become politically salient. This title is also available as Open Access on Cambridge Core.

In Markets from Networks, one of America's most influential sociologists unveils a groundbreaking theory of the market economy. Arguing that most economists use overly abstract models of how the economy operates, Harrison White seeks a richer, more empirically based alternative. In doing so, he offers a more lucid, generalized treatment of the market models described in his important earlier work in order to show how any given market is situated in a broader exchange economy. White argues that the key to economic action is that producers seek market niches to maximize profit and minimize competition. As they do so, they base production decisions not only on anticipated costs from suppliers and anticipated demand from buyers, but also by looking at their competitors. In fact, White asserts, producers act less in response to actual demand than by anticipating it: they gauge where competitors have found demand and thus determine what they can do that is similar and yet different enough to give themselves a special niche. Building on these and related insights, White creates new mathematical models of how the economy works and how the interaction of its sectors creates mutual protection from the uncertainties of business. These models provide new ways of accounting for profits, prices, market shares, and other vital economic phenomena. He shows, for example, that prices are determined by the coalescing of local variables rather than set in terms of averages as implied by the ''law'' of supply and demand. The model of ''pure'' competition favored by economics is deficient, he concludes, as it fails to account for the varied circumstances of particular industries. Throughout, White draws extensively on case studies of American businesses and on recent mathematical and sociological work on networks. Rivaling standard economic theories with its rich empirical grounding, sheer originality, and scholarly rigor, Markets from Networks will resonate in economics and economic sociology for years to come.