It also works well with existing products that are highly competitive and standardized, especially when they are of low unit-value and have high turnover.

如果产品本身极具竞争力，而且比较规范，那么，促销也适用于现有产品。尤其是如果这种产品单价较低而且流通量大。

The more the unit value of special asserts and the more quantity it gives, the more incentive enterprises will have to pursue long-term benefits and give up opportunist short-term benefits.

专用性资产单位价值越大，数量越多，企业越有谋求长远利益、放弃短期机会主义行为的激励。