ObjectiveTo measure sexual mixing among racial groups of men who have sex with men (MSM).MethodsThe authors explore its potential impacts, making two methodological advancements over previous work. First, the authors pioneer the use of Newman’s assortativity coefficient to characterise mixing among MSM. Second, the authors examine mixing at the level of primary ties and at the level of secondary ties.ResultsResults from the 1142-participant sample suggest that MSM are highly assortative by all races at the secondary level.ConclusionsNetworks of MSM may be more tightly contracted around racial groupings than previously supposed. These groupings may lead to increased HIV transmission in certain racial groups.
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