Abstract
Introduction
Theoretical Background
Measuring Virtuality
Social Network
Research Model and Hypothesis
Individual-level Virtuality and Internal Closure
Individual-level Virtuality and External Bridging
The Moderating Effect of Group-level Virtuality
Sampling and Data Collections
Measures
Validity of the Instruments
Analysis and Results
Multi-level Modeling
Intra-group Tie Strength
Extra-group Network Size
Extra-group Structural Hole
Limitations
Discussion and Implications
Academic Implications
Practical Implications
Conclusion
References