In a free, unregulated market system, market forces establish equilibrium prices and exchange quantities. While equilibrium conditions may be efficient, it may be true that not everyone is satisfied.

• 在自由的，不受管制的市场体系中，市场力量确定均衡价格和交换数量。尽管均衡状况可能是有效率的，但是它不可能使所有的人都满意。