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	Structural Holes Analysis	エゴネットワーク分析
分野	Sociology	ネットワーク分析
系統	Process / pipeline	Process / pipeline
提唱年	1992	1992 (Burt); foundational measurement formalised by Marsden 2002
提唱者	Ronald S. Burt	Ronald S. Burt (structural holes framework); Peter V. Marsden (egocentric measures)
種類	Ego-network measure of brokerage opportunity and constraint	Descriptive / relational network analysis
原典	Burt, R. S. (1992). Structural Holes: The Social Structure of Competition. Harvard University Press. ISBN: 978-0-674-84371-4	Burt, R.S. (1992). Structural Holes: The Social Structure of Competition. Harvard University Press. ISBN: 9780674843714
別名	structural holes, Burt constraint, network constraint analysis, effective size analysis	personal network analysis, egocentric network analysis, Ego Ağı Analizi (Personal Network Analysis)
関連	5	6
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.	Ego network analysis examines the personal network of a focal individual — the ego — by mapping their direct contacts (alters) and the ties those contacts share with one another. Formalised through Ronald Burt's structural holes framework (1992) and Marsden's egocentric measurement approach (2002), the method produces ego-level indicators such as network size, density, constraint, and brokerage role that reveal how each individual's social position shapes their access to information, resources, and influence.