  In this paper we investigate the evolution of cooperation when the
interaction structure is strictly local, and hence fitness only depends on
local behaviors, while the competition structure is partly global, and hence
selection can happen also between distant agents. We explore this novel setup
by means of numerical simulations in a model where agents are arranged in a
one-dimensional ring. Preliminary results suggest that the extent of global
comparison systematically favors defection under strong selection, while its
effect under weak selection is less systematic, but overall still favors
defection. Further, the extent of global comparison seems to reduce sensibly
fixation times.
