Over the last few decades some analytic tools intensely used by economics have produced useful insights in topics formerly in the exclusive reach of other social sciences. In particular game theory, justifiable from either a multi-person decision theoretic perspective or from an evolutionary one, often serves as a generous yet sufficiently tight framework for interdisciplinary dialogue. The three essays in this collection apply game theory to answer questions with some aspects of economic interest. The three of them have in common that they are related to topics to which other social sciences, specially sociology, have made significant contributions. While working within economics I have attempted to use constructively and faithfully some of these ideas. Chapter 1, coauthored with Xu Tan, studies situations in which a set of agents take actions in order to convey private information to an observing third party which then assigns a set of prizes based on its beliefs about the ranking of the agents in terms of the unobservable characteristic. These situations were first studied using game theoretic frameworks by Spence and Akerlof in the early seventies, but some of the key insights date back to the foundational work of Veblen. In our analysis we focus on the competitive aspect of some of these situations and cast signals as random variables whose distributions are determined by the underlying unobservable characteristics. Under this formulation different signals have inherent meanings, preceding any stable conventions that may be established. We use these prior meanings to propose an equilibrium selection criterion, which significantly refines the very large set of sequential equilibria in this class of games. In Chapter 2, coauthored with Matthew O. Jackson and Xu Tan, we study the structure of social networks that allow individuals to cooperate with one another in settings in which behavior is non-contractible, by supporting schemes of credible ostracism of deviators. There is a significant literature on the subject of cooperation in social networks focusing on the role of the network in transmitting the information necessary for the timely punishment of deviators, and deriving properties of network structures able to sustain cooperation from that perspective. Ours is one of the first efforts to understand the network restrictions that emerge purely from the credibility of ostracism, carefully considering the implications that the dissolution of any given relationship may have over the sustainability of other relations in the community. In Chapter 3 I study the sets of Pure Strategy Nash equilibria of a variety of binary games of social influence under complete information. In a game of social influence agents simultaneously choose one of two possible strategies (to be inactive or be active), and the optimal choice depends on the strategies of the agents in their social environment. Different social environments and assumptions on the way in which they influence the behavior of the agents lead to different classes of games of varying degrees of tractability. In any such game an equilibrium can be described by the set of agents that are active, and the full set of equilibria can be thus represented as a collection of subsets of the set of agents. I build the analysis of each of the classes of games that I consider around the question: What collections of sets are expressible as the set of equilibria of some game in the class? I am able to provide precise answers to these questions in some of the classes studied, and in other cases just some pointers.

​In four empirical studies, this cumulative work provides valuable insights for marketing executives of statutory health insurance funds and social media responsible. Paper I and II provide evidence about the importance and interplay of price and corporate reputation on the market of statutory health insurance. The second part changes perspective to corporate communication issues in the social media environment. By introducing the “social media brand value chain” paper III conducts a literature review of state of the art social media research. By means of a field experiment on Facebook, paper IV shows that brands do not necessarily have to communicate via their brand fan pages in a highly interactive and vivid way to positively influence attitudinal measures among their fan base.

We are deeply social creatures. Our core social needs — for meaningful social inclusion — are more important than our civil and political needs and our economic welfare needs, and we won't secure those other things if our core social needs go unmet. Our core social needs ground a human right against social deprivation as well as a human right to have the resources to sustain other people. Kimberley Brownlee defends this fundamental but largely neglected human right; having defined social deprivation as a persistent lack of minimally adequate access to decent human contact, she then discusses situations such as solitary confinement and incidental isolation. Fleshing out what it means tothers. Our core social needs can clash with oo belong, Brownlee considers why loneliness and weak social connections are not just moral tragedies, but often injustices, and argues that we endure social contribution injustice when we are denied the means to sustain ur interests in interactive and associative freedom, and when they do, social needs take priority. We have a duty to ensure that everyone has the opportunity to satisfy their social needs. As Brownlee asserts, we violate this duty if we classify some people as inescapably socially threatening, either through using reductive, essentialist language that reduces people to certain acts or traits — 'criminal', 'rapist', 'paedophile', 'foreigner' — or in the ways we physically segregate such people and fail to help people to reintegrate after segregation.

A landmark insider’s tour of how social media affects our decision-making and shapes our world in ways both useful and dangerous, with critical insights into the social media trends of the 2020 election and beyond “The book might be described as prophetic. . . . At least two of Aral’s three predictions have come to fruition.”—New York NAMED ONE OF THE BEST BOOKS OF THE YEAR BY WIRED • LONGLISTED FOR THE PORCHLIGHT BUSINESS BOOK AWARD Social media connected the world—and gave rise to fake news and increasing polarization. It is paramount, MIT professor Sinan Aral says, that we recognize the outsize effect social media has on us—on our politics, our economy, and even our personal health—in order to steer today’s social technology toward its great promise while avoiding the ways it can pull us apart. Drawing on decades of his own research and business experience, Aral goes under the hood of the most powerful social networks to tackle the critical question of just how much social media actually shapes our choices, for better or worse. He shows how the tech behind social media offers the same set of behavior influencing levers to everyone who hopes to change the way we think and act—from Russian hackers to brand marketers—which is why its consequences affect everything from elections to business, dating to health. Along the way, he covers a wide array of topics, including how network effects fuel Twitter’s and Facebook’s massive growth, the neuroscience of how social media affects our brains, the real consequences of fake news, the power of social ratings, and the impact of social media on our kids. In mapping out strategies for being more thoughtful consumers of social media, The Hype Machine offers the definitive guide to understanding and harnessing for good the technology that has redefined our world overnight.

The concept of a relational self has been prominent in feminism, communitarianism, narrative self theories, and social network theories, and has been important to theorizing about practical dimensions of selfhood. However, it has been largely ignored in traditional philosophical theories of personal identity, which have been dominated by psychological and animal theories of the self. This book offers a systematic treatment of the notion of the self as constituted by social, cultural, political, and biological relations. The author’s account incorporates practical concerns and addresses how a relational self has agency, autonomy, responsibility, and continuity through time in the face of change and impairments. This cumulative network model (CNM) of the self incorporates concepts from work in the American pragmatist and naturalist tradition. The ultimate aim of the book is to bridge traditions that are often disconnected from one another—feminism, personal identity theory, and pragmatism—to develop a unified theory of the self.

Examines the social media mechanism and how it is transforming communication in an increasingly networked society Social Media Communication: Trends and Theories explores how social media is transforming the way people think and behave. Providing students with an in-depth understanding of the mechanism underlying social media, this comprehensive textbook uses a multidisciplinary approach to examine social media use in a wide range of communication and business contexts. Each chapter is based on original research findings from the author as well as recent work in communication studies, neuroscience, information science, and psychology. Divided into two parts, the text first describes the theoretical foundation of social media use, discussing the impact of social media on information processing, social networking, cognition, interpersonal and group communication, the media industry, and business marketing. The second half of the book focuses on research-based strategies for effectively using social media in communication and business such as the news industry, heath care, and social movements. Offering detailed yet accessible coverage of how digital media technology is changing human communication, this textbook: Helps readers make the best use of social media tools in communication and business practices Introduces more than a dozen theories in the areas of communication, psychology, and sociology to highlight the theoretical frameworks researchers use in social media studies Identifies a variety of trends involving social media usage, including the app economy and patient care Addresses the relation between social media and important contemporary topics such as cultural diversity, privacy, and social change Presents 14 imperative social media topics, each with the power to change the ways you see and use social media Social Media Communication: Trends and Theories is the perfect textbook for undergraduate and graduate courses in communication, business, journalism, business, and information science and technology. It is also an invaluable resource for researchers, educators, journalists, entrepreneurs, and professionals working in media management, advertising, public relations, and business marketing.

Scholars from communication and media studies join those from science and technology studies to examine media technologies as complex, sociomaterial phenomena. In recent years, scholarship around media technologies has finally shed the assumption that these technologies are separate from and powerfully determining of social life, looking at them instead as produced by and embedded in distinct social, cultural, and political practices. Communication and media scholars have increasingly taken theoretical perspectives originating in science and technology studies (STS), while some STS scholars interested in information technologies have linked their research to media studies inquiries into the symbolic dimensions of these tools. In this volume, scholars from both fields come together to advance this view of media technologies as complex sociomaterial phenomena. The contributors first address the relationship between materiality and mediation, considering such topics as the lived realities of network infrastructure. The contributors then highlight media technologies as always in motion, held together through the minute, unobserved work of many, including efforts to keep these technologies alive. Contributors Pablo J. Boczkowski, Geoffrey C. Bowker, Finn Brunton, Gabriella Coleman, Gregory J. Downey, Kirsten A. Foot, Tarleton Gillespie, Steven J. Jackson, Christopher M. Kelty, Leah A. Lievrouw, Sonia Livingstone, Ignacio Siles, Jonathan Sterne, Lucy Suchman, Fred Turner