The Level of Concentration of the Enterprises from the Industry, Construction and Services

The term „concentration” describes the conditions of concurrency that prevail each activity field. The possible extremes of the concentration are the perfect concurrency, on the one hand, and the monopole, on the other hand. The perfect or automized concurrency is the Basic market structure with a very large number of companies that compete independently (each company has an insignificant share from the market, produces homogenous goods, uses identical production proceedings and has a perfect information and the entrance of other companies in the respective activity field is free). The market structure named monopole designs accompany that, in the activity field it operated, is the sole supplier of a homogenous product which has no substitutes and is distributed to a large number of buyers. Among the market structures, the perfect concurrency and the monopole, there are intermediary structures, with different levels of imperfect concurrency, so that in any contemporary economy there are more alternative market structures.