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We study models of spatial growth processes where initially there are sources of growth (indicated by the colour green) and sources of a growth-stopping (paralyzing) substance (indicated by red). The green sources expand and may merge with others (there is no 'inter-green' competition). The red substance remains passive as long as it is isolated. However,(More)
Rational choice theory of marriage market predicts that mate selectivity responds to operational sex ratios whereby the sex in shorter supply and thus greater demand becomes more selective. In contrast, an evolutionary psychological perspective on mate selectivity predicts that women on average will be more selective than men under most circumstances, and(More)
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