原装品、兼容品竞争格局下再制造打印耗材市场进入机会研究

针对打印耗材再制造商面临的原装品垄断、兼容品垄断及两者同时存在的三种不同市场格局,开展“两阶段”静态博弈分析。首先建立原装品与兼容品博弈模型,得出形成不同市场格局的成本边界值;在此基础上,进一步分析再制造商进入的条件。结果显示:当兼容品成本超过一定阈值时,原装品垄断,只有消费者绿色效用较高时,再制造商能通过确保再制造品质量(严格控制故障率)进入市场。当兼容品成本在一定阈值范围内时,原装品与兼容品竞争,再制造商面对原装品应采取物美价廉策略,面对兼容品应采取保质保量策略,以形成三方共存。当兼容品成本低于一定阈值时,兼容品垄断,若兼容品质量较好,消费者需具有一定绿色效用,再制造品才能够进入市场;若兼容品质量一般,再制造品凭借质量优势进入市场。最后,结合京东商城数据进行算例分析,验证研究正确性。

Compatible taper and stem volume equations for Larix kaempferi(Japanese larch) species of South Korea

In this study, compatible taper and stem volume equations were developed for Larix kaempferi species of South Korea. The dataset was split into two groups： 80% of the data were used in model fitting and the remaining 2o% were used for validation. The compatible MB76 equations were used to predict the diameter outside bark to a specific height, the height to a specific diameter and the stem volume of the species. The result of the stem volume analysis was compared with the existing stem volume model of Larix kaempferi species of South Korea which was developed by the Korea Forest Research Institute and with a simple volume model that was developed with fitting dataset in this study. The compatible model provided accurate prediction of the total stem volume when compared to the existing stem volume model and with a simple volume model. It is concluded that the compatible taper and stem volume equations are more convenient to use and therefore it is recommended to be applied in the Larix kaempferi species of South Korea.