Bertrand versus Cournot competition in a downstream mixed oligopoly with foreign ownership

Focusing on foreign ownership in the private firm, we examine the Cournot-Bertrand comparison in a mixed oligopolistic market with vertical market structure. We have found that if public and private firms were charged with uniform price for their inputs, then Cournot-Bertrand ranking in market outcomes confirms those obtained by Ghosh and Mitra (2010). This implies that under uniform pricing in the upstream sector, the vertical market structure does not have substantial influences on Cournot-Bertrand ranking. However, if discriminatory pricing is adopted, firm's profits, output, and social welfare are often reversed to those obtained from uniform pricing in the upstream sector. Given the closeness of products, if the share of foreign ownership is sufficiently low, social welfare in Cournot competition can exceed that of Bertrand competition, contrasting with the standard welfare ranking that Bertrand welfare is strictly higher than Cournot. This implies that Cournot competition can be more socially desirable than Bertrand in mixed oligopoly with vertical market structure if discriminatory pricing scheme is adopted by foreign upstream monopolists.     

桑叶配方颗粒物质基准研究

桑叶配方颗粒迄今尚没有统一的质量标准。为提升桑叶配方颗粒的内在质量,对其物质基准评价方法进行了研究。选取具有代表性产地的15批桑叶制备物质基准,采用高效液相色谱法,以芦丁、异槲皮苷、紫云英苷作为评价指标,确定桑叶物质基准的出膏率范围、标志性成分含量及转移率范围,采用超高效液相色谱法,建立物质基准UPLC特征图谱,并对其主要成分进行指认。结果表明:15批物质基准中,芦丁转移率为19.94%～34.05%,异槲皮苷转移率为11.67%～43.58%,紫云英苷转移率为10.73%～43.05%;物质基准特征图谱中,标定了14个共有峰,指认出7个色谱峰,分别为新绿原酸、绿原酸、咖啡酸、芦丁、异槲皮苷、槲皮素-3-O-(6″-O-丙二酰基)-β-D-葡萄糖苷、紫云英苷。所建立的基准评价方法为桑叶配方颗粒质量标准的制定及其后续大规模生产提供了数据基础。     

Environmental taxes,reforms and economic growth: an empirical analysis of panel data

This paper explores the relationship between environmentally related taxes and the economic growth rate. The analysis also investigates whether this relationship differs between countries that have implemented environmental tax reforms (ETRs) and those that have not. Using panel data from 31 OECD countries over the period 1994–2013, the paper finds that when we allow environmentally related tax revenues to interact with an initial level of real GDP per capita, the overall revenues of these taxes are negatively associated with the economic growth rate in the short and long term. Furthermore, we show that the higher the initial level of GDP per capita, the more environmentally related tax revenues can promote the economic growth rate. The analysis also reveals that the relationship between environmentally related tax revenues and economic growth varies between countries that have a mechanism to redistribute environmentally related tax revenues and those that do not.     

跨国企业的转让定价策略--基于价值链的案例研究

在全球价值链分工日益成熟的背景下,跨国企业的关联交易安排日益复杂,如何制定转让定价规则以保证整体税负和风险水平同时较低成为跨国企业面临的新问题。通过W集团在关联交易中转让定价策略的案例,运用价值链分析和功能风险分析,从企业价值创造和税收产生的源头着眼,沿着价值链的推进分析了VIE模式的跨国企业在转让定价中的税负与风险问题。基于价值链分析构建出跨国企业的转让定价分析模型,可为跨国企业制定转让定价策略提供新思路,也有助于丰富价值链分析的应用领域。     

Intraday return and volatility spillover mechanism from Chinese to Japanese stock market

We analyze the mechanism of return and volatility spillover effects from the Chinese to the Japanese stock market. We construct a stock price index comprised of those companies that have substantial operations in China. This China-related index responds to changes in the Shanghai Composite Index more strongly than does the TOPIX (the market index of the Tokyo Stock Exchange). This result suggests that China has a large impact on Japanese stocks via China-related firms in Japan. Furthermore, we find evidence that this response has become stronger as the Chinese economy has gained importance in recent years.     

试论大数据技术在生态环境保护领域的应用架构及相关技术

促进大数据在生态环境保护领域的深化应用,可以提高生态环境监管能力,并实现环境管理工作精细化。实践中需要把握生态环境信息化的大数据需求,对其应用架构及相关技术进行深入探究,以从多维度出发挖掘有价值的信息,更好地服务生态环境保护工作。     

一种机载三维音频技术的快速计算方法

针对机载三维音频应用的实时性需求，提出了一种基于单耳相对头相关传递函数和改进型混响模型的机载三维音频快速实现方法，在较传统实现方式性能无明显下降的情况下降低了80%的计算量。对提出的算法在F-16战斗机模拟强噪声环境下进行相关主观试听实验，同时在某型飞机音频系统中实验验证。实验结果表明,所提方法在实时处理3路三维音频时，三维音频方位分辨精度在5°以内，可满足实际机载平台使用需求。     

董事高管责任保险与上市公司关联交易——基于我国上市公司经验数据的检验

董事高管责任保险(D&O保险)是一个市场化的外部治理机制。基于沪深证券交易所2003—2017年上市公司数据,本文实证检验了D&O保险对上市公司关联交易的影响。研究发现,D&O保险显著提升了关联交易总水平、关联销售金额和关联购买金额;根据控股产权性质分组研究发现,D&O保险对非国有控股公司关联交易的正向影响,比对国有控股公司更加显著;D&O保险、关联交易均与公司价值显著正相关,且关联交易发挥中介效应。研究表明,D&O保险通过监督效应提升关联交易,并促使其对公司价值发挥支持效应。研究加深了对D&O保险治理职能的理解,更新了对关联交易经济后果的惯性认知,对促进公司治理治理机制建设和完善现代企业制度具有重要的理论和现实意义。     

累积投票制与投资者保护

 基于近年来频发的个股崩盘现象,本文运用2013-2018年上市公司的数据,对大股东减持前的业绩预告信息进行分析,探究业绩预告、大股东减持与股价崩盘风险之间的内在联系,并针对不同市场环境和股份性质进行实证检验。结果表明,上市公司倾向于在减持前公布积极业绩预告。其在一定程度上提高股价崩盘现象的发生率,在熊市和民营公司中作用更加明显,消极业绩预告影响不显著。本文的研究丰富了信息披露与股价反应的相关文献,对投资者和监管部门做出决策具有一定的启示意义。     

浅谈工程投标保证金现状

本文介绍了现有投标保证金的相关规定,总结了投标保证金在实际招投标活动中起到的作用和存在的弊病,并提出了三点建议。