摘要
In the classical economic prevalent opinions, economic efficiency is in direct proportion to the level of the market competitiveness and perfect competitive market has the highest efficiency. However, in this paper, it will be approved the viewpoint that perfect competitive market owns highest efficiency is not existent in practical economy, even on the theoretic level, uncertainty exits. So the perfect objective model the government oolicv should oursue is coexistence of the effective competition and effective monopoly.
