This study attempts to look for another breakthrough and makes a theoretical contribution to the further study for the trade-ins behavior .

本研究试图为 以 旧 换 新行为寻找另外一个研究突破口，为进一步的研究做出理论贡献。

For consumers the trade-ins process mainly related to two issues which are the old product discounts and new product valuation .

对于消费者来说， 以 旧 换 新过程中主要涉及到旧产品的折价和新产品的估价两个问题。

Gazelle also noted that in the week Apple introduced the latest iPhones the number of trade-ins of Samsung products tripled compared with the week before .

Gazelle还指出，在苹果推出最新版iPhone的那一周，三星（Samsung）产品的 收购数量比前一周增加了两倍。

However the operating mechanism and theoretical that support the research of Trade-ins policy relative insufficiency ( Rao 2009 ) .

但是， 以 旧 换 新的操作机制和理论支持研究的 还比较缺乏（ Rao，2009）。

The brick and mortar chain also started accepting trade-ins of Apple IOS devices for store credit .

该实体店还开始对苹果 iOS 电脑进行 折旧 回收，返还店 内积分。

The idea is a joint government-manufacturer incentive plan to give consumers with old car trade-ins a $ 3 cash back deal on the purchase of any new car .

这个方案是政府和企业携手合作推出的奖励计划，让购车人用原有的 旧车作为交换，不管买什么样的新车时就可以得到3千美元现金。