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	Positional Analysis	Blockmodeling	Structural Equivalence
Campo	Sociology	Sociology	Sociology
Famiglia	Process / pipeline	Process / pipeline	Process / pipeline
Anno di origine	1976	1976	1971
Ideatore	Harrison White, Ronald Burt, and colleagues	Harrison White, Scott Boorman & Ronald Breiger	François Lorrain & Harrison White
Tipo	Framework for identifying network positions and the roles among them	Network partitioning into positions and a reduced role structure	Equivalence relation grouping actors with identical tie patterns
Fonte seminale	Burt, R. S. (1976). Positions in networks. Social Forces, 55(1), 93–122.	White, H. C., Boorman, S. A., & Breiger, R. L. (1976). Social structure from multiple networks. I. Blockmodels of roles and positions. American Journal of Sociology, 81(4), 730–780.	Lorrain, F., & White, H. C. (1971). Structural equivalence of individuals in social networks. The Journal of Mathematical Sociology, 1(1), 49–80.
Alias	role analysis, positional role analysis, network role and position analysis, regular equivalence analysis	block modeling, blockmodel analysis, generalized blockmodeling, CONCOR	structural equivalence analysis, positional equivalence, Euclidean equivalence of actors, equivalence classes
Correlati	5	4	5
Sintesi	Positional analysis is the network-analytic program that identifies the positions actors occupy — sets of actors equivalent in their relational patterns — and characterizes the system of roles that links those positions. Growing out of Harrison White's structuralism and Ronald Burt's operationalization in the 1970s, it treats the social structure as a small set of positions and the role relations among them, rather than as a collection of individual actors.	Blockmodeling is a family of methods that simplify a social network by partitioning its actors into positions — groups of actors who are equivalent in their pattern of ties — and summarizing the relations between positions as a compact image, or reduced role structure. Introduced by Harrison White, Scott Boorman, and Ronald Breiger in 1976, it shifts attention from individuals to the structural roles they occupy.	Structural equivalence identifies actors who occupy the same position in a network because they have identical ties to identical others. Defined by François Lorrain and Harrison White in 1971, it formalizes the idea that two people are interchangeable in the social structure when they relate to exactly the same set of third parties, and it provides the foundation for partitioning networks into positions and building blockmodels.