  We study the role of imitation within the Minority Game model of market. The
players can exchange information locally, which leads to formation of groups
which act as if they were single players. Coherent spatial areas of rich and
poor agents result. We found that the global effectivity is optimized at
certain value of the imitation probability, which decreases with increasing
memory length. The social tensions are suppressed for large imitation
probability, but generally the requirements of high global effectivity and low
social tensions are in conflict.
