1. We analysed time-series data from populations of red kangaroos (Macropus rufus, Desmarest) inhabiting four areas in the pastoral zone of South Australia. We formulated a set of a priori models to disentangle the relative effects of the covariates: rainfall, harvesting, intraspecific...

We construct a simple firm-based model of global interdependence. We show how extremely strong statistical correlations can naturally develop between countries even if the interconnections between those countries remain very weak. Potential policy implications of this result are also discussed.