经济学认为,有货币支付能力的需求是有效需求,只有有效需求才可能成为现实的购买力。有效需求又包括显现需求和潜在需求。显现需求是指消费者有意识的欲望,一般可以理解为,消费者在进入商店之前已计划购买的商品和愿意支付的钱数。而潜在需求是消费者没有明确意识的,或者是朦胧的欲望,在潜在需求及到满足之前,消费者预先并不知道自己对这种商品的需要,或者即使存在着 Economics believes that there is an effective demand for the ability to pay for money, and only effective demand can become a realistic purchasing power. Effective demand also includes explicit demand and potential demand. Showing demand is the conscious desire of the consumer. It can generally be understood as the number of goods that the consumer has planned to purchase before entering the store and the amount of money he is willing to pay. The potential demand is that the consumer does not have a clear sense of consciousness, or is an embarrassed desire. Before the potential demand and satisfaction, the consumer does not know in advance the need for the product, or even if there is a