| Preface |
| Introduction / 1： |
| Getting Connected |
| Networks as Information Maps |
| Leaders and Followers |
| Networks as Conduits |
| The Point of View |
| Basic Network Concepts / 2： |
| Individual Members of Networks / Part I： |
| What Is a Network? |
| Sociological Questions about Relationships |
| Connections |
| Propinquity |
| Homophily |
| Individual-Level Homophily |
| Homophily and Collectivities |
| Dyads and Mutuality |
| Balance and Triads |
| Where We Are Now |
| Whole Social Networks / 3： |
| Distributions |
| Dyads and Triads |
| Density |
| Structural Holes |
| Weak Ties"Popularity" or Centrality |
| Distance |
| Size of the Interpersonal Environment |
| The "Small World"Multiplexity |
| Roles and Positions |
| Named Positions and Relationships |
| Informal Positions and Relationships |
| Informal Relations and Hierarchies |
| Embeddedness of the Informal within Instituted or Named Networks |
| Observed Roles |
| Summary |
| Network Segmentation / 4： |
| Named and Unnamed Network Segments |
| Primary Groups, Cliques, and Clusters |
| Segmenting Networks from the Point of View of the Observer |
| Segmenting Groups on the Basis of Cohesion |
| Resistance to Disruption |
| Structural Similarity and Structural Equivalence |
| Core/Periphery Structures |
| The Psychological Foundations of Social Networks / 5： |
| Getting Things Done |
| Community and Support |
| Safety and Affiliation |
| Effectiveness and Structural Holes |
| Safety and Social Networks |
| Effectiveness and Social Networks |
| Both Safety and Effectiveness? |
| Driving for Status or Rank |
| Cultural Differences in Safety, Effectance, and Rank |
| Motivations and Practical Networks |
| Motivations of Corporate Actors |
| Cognitive Limits on Individual Networks |
| Small Groups, Leadership and Social Networks: The Basic Building Blocks / 6： |
| Primary Groups and Informal Systems: Propositions |
| Pure Informal Systems |
| How to Find Informal Systems |
| Asymmetric Ties and the Influence of the External System |
| Formalizing the System |
| Organizations and Networks / 7： |
| The Contradictions of Authority |
| Emergent Networks in Organizations |
| The Factory Floor |
| Information-Driven Organizations |
| Inside the Box, Outside the Box, or Both |
| Bridging the Gaps: Tradeoff s between Network Size, Diversity, and Social Cohesion |
| The Small World, Circles, and Communities / 8： |
| How Many People Do You Know? |
| The Skewed Distribution of the Number of People One Knows |
| Formal Small World Models |
| Clustering in Social Networks |
| Social Circles |
| The Small World Search |
| Applications of Small World Theory to Smaller Worlds |
| Networks and Diffusion / 9： |
| Networks and Diffusion - An Introduction |
| The Basic Model |
| Exogenous Factors in the Adoption of Innovation |
| Influence and Decision-Making |
| The Current State of Personal Influence |
| Self-Designated Opinion Leaders or Influentials |
| Characteristics of Opinion Leaders and Influentials |
| Group Influence |
| Epidemiology and Network Diffusion |
| Social Networks and Epidemiology |
| Social Networks and HIV-AIDSTransporting Disease - Large-Scale Models |
| Tipping Points and Thresholds |
| Threshold |
| Networks as Social Capital / 10： |
| The General Idea of Social Capital |
| Social Capital as Investment |
| Individual-Level Social Capital |
| Social Support |
| Individual Networked Resources: Position and Resource Generators |
| Correlates of Individual Social Capital |
| Other Indicators of Networked Resources |
| Social Capital as an Attribute of Social Systems |
| Theorists of Social System Social Capital |
| Bowling Alone |
| Recent Findings on Social System Social Capital and Its Consequences |
| Ethical Dilemmas of Network Research / 11： |
| Networks as a Research Paradigm |
| Anonymity, Confidentiality, Privacy, and Consent |
| Who Benefits |
| Cases and Examples |
| Survey Research |
| Organization and Research |
| Terrorists and Criminals |
| Networks and Terrorism: The CASOS Projects |
| Conclusion: More Complicated than the Belmont Report |
| Coda: Ten Master Ideas of Social Networks / 12： |
| The Ten Master Ideas |
| Bibliography |
| Notes |
| Index |
| Preface |
| Introduction / 1： |
| Getting Connected |
| Networks as Information Maps |
| Leaders and Followers |
| Networks as Conduits |
