手法を比較

	Structural Holes Analysis	Brokerage Analysis
分野	Sociology	Sociology
系統	Process / pipeline	Process / pipeline
提唱年	1992	1989
提唱者	Ronald S. Burt	Roger Gould & Roberto Fernandez
種類	Ego-network measure of brokerage opportunity and constraint	Classification of intermediary positions in a network
原典	Burt, R. S. (1992). Structural Holes: The Social Structure of Competition. Harvard University Press. ISBN: 978-0-674-84371-4	Gould, R. V., & Fernandez, R. M. (1989). Structures of mediation: A formal approach to brokerage in transaction networks. Sociological Methodology, 19, 89–126.
別名	structural holes, Burt constraint, network constraint analysis, effective size analysis	Gould-Fernandez brokerage, brokerage roles, brokerage typology, structures of mediation
関連	5	5
概要	Structural holes analysis, developed by Ronald Burt, measures the brokerage opportunities available to an actor by examining the gaps — structural holes — between their otherwise disconnected contacts. An actor whose contacts do not know each other bridges non-redundant sources of information and control and is said to be rich in structural holes; an actor whose contacts are all interconnected is constrained. The core measures — network constraint, effective size, and efficiency — quantify how much advantage an ego's network structure confers.	Gould-Fernandez brokerage analysis classifies the intermediary positions actors occupy in a network. For every two-path in which an actor v sits between a source i and a target j, the analysis labels v's role according to the group memberships of the three actors, yielding five distinct brokerage types — coordinator, itinerant broker (consultant), gatekeeper, representative, and liaison. Counting how often each actor plays each role reveals who mediates within groups, who controls access across group boundaries, and who bridges otherwise separate communities.