To foster a deeper understanding of the mechanisms behind inequality in society, it is crucial to work with well-defined concepts associated with such mechanisms. The aim of this paper is to define cumulative (dis)advantage and the Matthew effect. We argue that cumulative (dis)advantage is an intra-individual micro-level phenomenon, that the Matthew effect is an inter-individual macro-level phenomenon and that an appropriate measure of the Matthew effect focuses on the mechanism or dynamic process that generates inequality. The Matthew mechanism is, therefore, a better name for the phenomenon, where we provide a novel measure of the mechanism, including a proof-of-principle analysis using disposable personal income data. Finally, because socio-economic theory should be able to explain cumulative (dis)advantage and the Matthew mechanism when they are detected in data, we discuss the types of models that may explain the phenomena. We argue that interactions-based models in the literature traditions of analytical sociology and statistical mechanics serve this purpose.
We examined the occurrence and coexistence of externalising and internalising problem behaviour among Swedish boys and girls, and investigated whether there are differences in the accumulation of problems among adolescents with different behavioural, demographic and social characteristics. The results are discussed in the context of self‐salience schemas. The source material comprised all ninth grade pupils in a province in central Sweden in 2008 (N = 3,095). First, girls were found to be more prone to experience internalising problem behaviour, whereas no sex differences were found regarding externalising problem behaviour. Second, multidimensional scaling maps indicated that, compared with boys, self‐esteem and the PsychoSomatic Problem (PSP) scale among girls more closely indicated externalising problem behaviour components, whereas anxiety was situated far from the other externalising problem behaviour indicators. Finally, linear regression analyses indicated family type as the primary explanatory background factor for externalising problem behaviour and economic hardship as the primary explanatory background factor for internalising problem behaviour.
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