Volatility of volatility is (also) rough

Using high-frequency data for major volatility indexes, we compute the volatility of volatility and show that its logarithm follows a fractional Brownian motion with Hurst parameter smaller than 1/2 thereby extending to the volatility asset class the recent findings obtained for the equity index markets. The results confirm that the volatility of volatility is a rough process and it possesses the long memory property. We also show that the correlation between the volatility and the volatility of volatility is positive, consistent with observations in the volatility option market. Lastly, a robustness check using volatility futures confirms the findings.     

供应链管理影响因素及评价指标分析

本文认为,供应链凝聚、信息获取能力、区位优势以及信息共享是影响供应链管理成功的四个主要因素,对这四个变量难以直接进行测量。供应链管理成功影响因素测评指标体系是一个多指标的结构,运用层次化结构设定测评指标,从而清晰地表述供应链管理成功影响因素测评指标体系的内涵。供应链管理成功影响因素是总的测评目标,为一级指标,即第一层次;供应链管理成功影响因素中的供应链凝聚、区位优势、信息获取能力、信息共享等四大要素为二级指标,即第二层次;根据各要素的含义和内容,将四大要素(二级指标)展开为具体的三级指标,即第三层次。     

浅析我国绿色物流的发展

本文论述了传统物流对环境的影响,指出绿色物流是适应可持续发展要求,满足国际市场需求的。针对我国绿色物流在发展过程中存在的物流基础设施、信息技术、管理体制等方面的问题,作者从政府职能和企业作用两个方面给出了相应的解决对策。     

化学二氧化锰的研究进展

综述了化学二氧化锰的制备方法及国内外研究现状。介绍了几种常用的制备方法,碳酸锰热分解法、硝酸锰热分解法、氢氧化锰氧化法、硫酸锰氧化法和高锰酸盐还原法,并分析了这些制备方法的利弊。目前化学二氧化锰的主要工业生产方法是碳酸锰热分解法和硝酸锰热分解法。     

The Big Family: Informal Financing of Small‐ and Medium‐Sized Businesses by Guanxi

Guanxi facilitates interaction between companies and people in Confucian societies. Does this type of social construct still play the key role, when the entrepreneurs live in Western societies? The objective of this article is to verify the impact of Guanxi on the capacity of small and medium‐sized businesses accessing financial resources informally. To this end, data collected from small Chinese entrepreneurs active in the principal business center of Brazil were used. From nonparametric tests, the results suggest that: (1) different levels of Guanxi allow small and medium‐sized businesses to access informal financial resources; (2) different types of informal financing are mostly used, or judged to be more significant, depending on the level of Guanxi of the entrepreneur in terms of parental and nonfamily ties; and (3) unlike the Western literature on the financial cycles of start‐ups, this type of informal financing can extend beyond the initial stage of the business. © 2014 Wiley Periodicals, Inc.     

年薪制“两次喊停”告诉我们什么？

6年来,国企经营者年薪制改革两次因故受阻,这其中存在一些亟待解决的深层次问题。要理性认识年薪制改革当前的目标和作用,认识这一改革的艰巨性和长期性,突出重点,化解主要矛盾,推进年薪制改革顺利进行。     

Exploring subcultural differences in hofstede's value survey: The case of the Chinese

Hofstede's Value Survey Module (VSM) identifies fundamental differences in the way people in various countries perceive and interpret their worlds. After adjusting value scores on the basis of demographic features of samples in the present study, values between subcultural groupings in four Chinese-populated regions (Taiwan, Beijing, Hong Kong, and Wuhan) were compared, and strong subcultural differences revealed. A methodology is proposed to facilitate VSM comparisons using limited, secondary data sources. Propositions concerning subcultural differences are suggested on the basis of the findings.     

石油、石化企业综合利用煤、油、气资源途径初探

近年来我国原油进口数量急剧增加。石油安全问题引起广泛关注。而我国煤炭与天然气资源相对比较丰富。统筹规划并合理利用煤、油、气资源，通过煤化工、石油炼制、石油化工3个行业技术上的互相借鉴，资源上的互相替代，产业链的互相补充，尽量减少石油的消耗，以减轻对进口原油的依赖。     

衬衫生产RTY的研究

通过研究衬衫生产流通合格率RTY,建立科学完善的质量检验机构和检验点,及时发现并解决关键项,降低生产流程中产品返工、返修或报废所造成的损失,对衬衫生产企业有一定的参考价值。     

亏损上市公司价值相关性实证分析

会计盈余是影响上市公司股票价值的一个重要因素。以我国亏损上市公司为对象,根据亏损性质的不同将亏损公司分为单赤字公司、虚双赤字公司、实双赤字公司以及三赤字公司四类。实证分析显示：亏损最为严重的是三赤字公司,其会计盈余和权益账面价值与股价之间均不存在显著的相关性。