Exploring International Investment Through a Classroom Portfolio Simulation Project

A rapid integration of financial markets has prevailed during the last three decades. Investors are able to diversify investment beyond national markets to mitigate return volatility of a “pure domestic portfolio.” This article discusses a simulation project through which students learn the role of international investment by managing their own portfolios. The article explains the project's investment ground rule, trading requirement, and grading rubric. The students are required to examine many important factors in international business such as currency risks and regional policies. The structure of this project can also be applied to a course involving student-managed investment funds.     

我国上市公司的多元化战略和经营绩效分析——基于混合并购的实证研究

本文以2004—2009年期间我国的上市公司作为样本,从首次混合并购视角研究多元化经营对企业绩效的影响。本文采用企业经营性现金流回报作为衡量经营绩效的指标,借鉴事件研究法的基本思路,对比了451家实施不同类型并购的上市公司经营绩效的差异。结果显示无论是跨行业还是跨地区混合并购,企业的经营绩效在并购完成后都明显下降。原因在于混合并购所产生的财务协同效用较小及实施混合并购后企业须承担额外经营成本。     

股权多元化的回顾与总结

以国有企业为主要对象的股权多元化一直是我国国有经济改革的重点,已有的实证研究大多支持股权多元化确实能够提高企业绩效。当前我国股权多元化改革正处于关键时期,必须正确认识股权多元化改革的任务和目标,股权多元化只是建立现代企业制度的手段之一。     

Ownership structure and the diversification and performance of publicly-listed companies in China

The growth and heightened competitiveness of listed companies in China share several central features. These include the gradual transition of state-owned assets to private investors, a rapid pace of product diversification, and impending rapid growth into international markets. In this article, we focus on measuring and identifying the implications of the ownership structure and diversification strategy of listed companies in China. We highlight recent developments in the ownership transition of China's companies, and point to an ownership classification system that can better identify and address differences in the motivations, strategies, and performance of these companies.     

股权分置与中国上市公司多元化经营

本文剔除了上市公司中的相关多元化企业,以非多元化企业和不相关多元化企业为样本,区分了上市公司是否选择多元化经营战略和多元化上市公司具体选择多高的多元化程度两种情况．分别运用Logit模型和多元线性回归模型考察了股权分置对中国上市公司多元化经营的影响。实证分析结果表明,在控制了企业所处的行业、企业规模、技术水平和负债水平等因素后．股权分置对上市公司是否选择多元化经营以及对多元化上市公司多元化程度的选择均有显著影响。     

我国上市公司的多元化战略与公司绩效

本文以2004年深沪两市的696家非金融公司作为样本,通过建立有效的多元化经营指标,考察了中国上市公司多元化战略与其绩效(CROA)的关系。实证研究表明,多元化有一定的正面效应,即能够降低公司经营风险,但是从整体上来看,多元化的成本仍然大于收益,导致多元化程度与公司绩效负相关。这一实证结果与多元化给企业带来巨大成本的理论一致。     

多元知识探寻与后发企业技术创新

当后发企业由追随向引领转型时，将致力于对全球化技术、基础科学等多种知识来源的积极探寻，以推进自身技术创新。基于专利及引文数据，分析海外技术知识与科学知识对后发企业技术创新的影响效应。实证研究发现：海外技术知识转移水平与后发企业创新呈U型关系；知识来源的地理多样性则正向作用于后发企业创新。另外，企业科学关联度对后发企业技术创新未起到显著促进作用。在后发转型背景下，明晰企业对多元知识的技术学习机制和效果，对企业创新追赶及其国际化具有重要指导意义。     

相关与非相关多元化经营抑制了实质性创新吗

以沪深A股上市公司为研究样本，通过手工分类上市公司每年各主营业务收入，按照熵指数法测算出独特的相关和非相关多元化经营程度指数。同时，使用知识宽度法测算发明专利质量，以此作为实质性创新的代理变量，分别实证检验企业相关和非相关多元化经营对实质性创新的影响。结果发现，整体层面上看，相关多元化经营程度加深会对企业发明专利质量起促进效应；非相关多元化经营程度与发明专利质量呈倒U型关系，通过计算发现，大部分企业非相关多元化经营程度处于倒U型关系临界值左侧，即发挥促进发明专利质量的作用；异质性检验发现，相关多元化的促进效应和非相关多元化的倒U型关系分别在国有企业表现得更显著。研究对企业选择合适的相关与非相关多元化经营方向和程度，提升企业实质性创新能力具有重要现实指导价值。     

Frontiers of commercial real estate portfolio performance: Are sector-region-efficient diversification strategies a myth or reality?

This paper departs from the traditional optimisation methods used to evaluate portfolio performance. Rather, the Stochastic Frontier Analysis approach is used to econometrically determine the benchmark real estate portfolio frontier and subsequently assess the gains from diversifying real estate portfolios along regional and sectoral dimensions in the UK. Portfolio specific inefficiency measures are obtained which indicate whether a portfolio is efficiently diversified and therefore places on the benchmark frontier and if not, the degree to which performance can be improved is quantified. Portfolio-specific efficiencies average at 85–91%, indicating scope to further improve performance. Further, diversification be it on a sectoral or regional dimension, contributes to significantly lower variability in portfolio efficiencies.     

The entry and exit dynamics of the cryptocurrency market

This paper presents an analysis of the entry and exit dynamics of the cryptocurrency market that focuses on the growth of initial coin offerings during 2015–2020. We used two different datasets: one includes long-lived cryptocurrencies, while the other includes the whole cryptocurrency system at our disposal–that is, it considers the entering and exiting cryptocurrencies. Comparing the dynamics between both datasets with the index cohesive force approach, we assessed how the growth of the initial coin offerings and the exiting cryptocurrencies affected the connectedness of the market. Our results show that the expansion of the cryptocurrency system gave rise to a strong collective movement during 2018–2019. Afterwards, the group pressure, due to the bubble of the initial coin offerings, decreased in favour of the largest cryptocurrencies. Lastly, we observed changes in the hierarchical order of the most influential cryptocurrencies. In particular, Ethereum became the most influential cryptocurrency, at the detriment of Bitcoin.