The Nagayama triangle represents the conceptually allowed area when the vote or seat shares of the second-running contestant are graphed against the shares of the top contestant. This research note points to various uses of this tool in the study of Duvergerian processes.
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References
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Grofman, Bernard, Alessandro Chiaramonte, Roberto D’Alimonte and Scott L. Feld (2004) ‘Comparing and Contrasting the uses of Two Graphical Tools for Displaying Patterns of Multiparty Competition: Nagayama Diagrams and Simplex Representations’ , Party Politics, 10(3): 273–299 .
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