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1.
Simon P. Anderson
ystein Foros Hans Jarle Kind 《Journal of Economics & Management Strategy》2019,28(1):125-137
Consumer “multihoming” (watching two TV channels, or buying two news magazines) has surprisingly important effects on market equilibrium and performance in (two‐sided) media markets. We show this by introducing consumer multihoming and advertising finance into the classic circle model of product differentiation. When consumers multihome (attend more than one platform), media platforms can charge only incremental value prices to advertisers. Entry or merger leaves consumer prices unchanged under consumer multihoming, but leaves advertiser prices unchanged under single‐homing: Multihoming flips the side of the market on which platforms compete. In contrast to standard circle results, equilibrium product variety can be insufficient under multihoming. 相似文献
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决策树是数据挖掘中常用的分类技术,其生成的规则便于决策者理解和应用。然而面对较多的属性且含有冗余和噪声属性的记录集生成的决策树时,无法删除冗余属性,造成运算过程复杂。本文旨在通过应用粗糙集理论,将其与决策树方法进行结合,对属性进行约简,降低运算复杂度,并生成相对简化的规则形式,并将其应用到银行个人贷款客户信用评估之中。 相似文献
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Ecological integrity is important to fully describe the development of an economy. We calculated an aggregate index that quantifies the closeness of a forested region to a natural state. This naturalness index was based on the diversity of native tree species and sizes for ecological subregions in a seral condition. The index used the spatial–temporal array of sample plots from the Forest Inventory and Analysis (FIA) database of the USDA Forest Service. In the 70 survey units of the southern US between 1961 and 2005 the naturalness of forests generally improved with per capita personal income and population. The increase with income was consistent with the hypothesis of an environmental Kuznets curve for forested landscapes. 相似文献
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We propose a new cost allocation rule for minimum cost spanning tree games. The new rule is a core selection and also satisfies cost monotonicity. We also give characterisation theorems for the new rule as well as the much-studied Bird allocation. We show that the principal difference between these two rules is in terms of their consistency properties. 相似文献
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In this paper a multi-factor generalization of Ho–Lee model is proposed. In sharp contrast to the classical Ho–Lee, this generalization
allows for those movements other than parallel shifts, while it still is described by a recombining tree, and is a process
with stationary independent increments to be compatible with principal component analysis. Based on the model, generalizations
of duration-based hedging are proposed. A continuous-time limit of the model is also discussed.
This research was supported by Open Research Center Project for Private Universities: matching fund subsidy from MEXT, 2004–2008
and also by Grants-in-Aids for Scientific Research (No. 18540146) from the Japan Society for Promotion of Sciences. 相似文献
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应用灰关联理论对发动机的故障进行诊断。灰关联分析属非函数型的序列模式,能有效处理杂散数据。通过建立工程机械发动机系统故障树,运用灰关联分析对关联度进行计算及排序,给出各种故障模式发生的可能性排序,从而为处理故障、控制故障的发生以及改进系统的可靠性提供理论依据。 相似文献
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宁波市天一广场盆栽大树移植技术探讨 总被引:1,自引:0,他引:1
本文以天一广场盆栽大树成功移植经验为基础,详细论述了城市绿化建设中特殊条件下大树移植发方法,以期对类似园林工程施工有所帮助。 相似文献
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本文针对我国股改中的百慕大权证提出了新的“模拟树-市场情绪”定价模型。该模型的实证研究结果表明中国权证市场价格存在严重高估;加入市场情绪指标后,通过建立多元回归模型得到了对于实际价格的显著的拟合结果,有力地解释了超出权证理论价格的实际价格所包含的情绪因素。本文最后对权证价格高估的原因及权证未来的走势进行了分析。 相似文献