企业规模对专利产出影响的实证分析——基于1998—2010年上市公司经验证据

使用1998—2010年中国A股上市公司的年度数据,研究了企业规模对专利产出和专利密度的影响。结果表明:发明专利和实用新型专利与企业规模之间存在U型关系,外观设计专利与公司规模呈倒U型关系;三类专利的专利密度都与企业规模之间存在U型关系;企业的知识存量、成立时间、财务杠杆、所有制类型等企业内部因素以及市场集中度、企业所处区域等外部环境因素都对企业的专利产出有显著影响。据此提出企业创新发展路径假说。     

Do insurance activities enhance the performance of financial services holding companies?

Stiroh and Rumble (2006) and Yeager et al. (2007) have argued that extension of banks into nonbanking activities produces no diversification benefits for financial services holding companies (FSHCs) eligible to consolidate banking and insurance products. We investigate the effect of aggregate nonbank activities, as well as two main areas of insurance business, namely agency and underwriting enterprise, on the risk-adjusted performance of FSHCs. Our sample includes a quarterly panel data of FSHCs over the period 2003–2011. We find that the effect of FSHCs’ entry into agency insurance activities on their risk-adjusted returns is dependent on their size; it is positive for FSHCs in the top quartile of our sample (assets greater than $4.495 billions), but negative for smaller and mid-size FSHCs. The effect of underwriting insurance activities on risk-adjusted returns is generally negative or statistically insignificant, except for some of the largest-size firms.     

中国财产保险公司资本结构的影响因素

利用1998-2009年中国大陆地区财产保险公司的业务数据和财务数据,通过差分GMM方法实证研究中国财产保险公司资本结构的影响因素发现:中国财产保险公司的目标负债水平与公司规模、再保险利用、公司成熟度的关联显著为正,与利润波动性的关联显著为负,而与产品分散化、地理分散化、产品收支间隔期的关联不显著.     

Optimal rebalance rules for the constant proportion portfolio insurance strategy – Evidence from China

The constant proportion portfolio insurance (CPPI) strategy is one of the most popular asset allocation strategies employed by guaranteed-return financial products investors. Rebalance disciplines play an important role in determining the CPPI performance in practice. This paper examines whether the selection of rebalance rules affects CPPI strategy performance in the context of Chinese equity markets and, if so, in what pattern, and whether an optimal parameter of rebalance exists. We find that, (1) the three alternative rebalance disciplines – time discipline, market move discipline and lag discipline – are indifferent in affecting the performance of CPPI strategy; (2) in terms of optimal parameters of each rebalance rule, the optimal rebalancing period for the time discipline is 3 trading days, the optimal trading threshold of the market move discipline 4%, and the optimal lag factor of the lag discipline 6%. These optimal parameters are not influenced by the length of investment.     

外部治理环境与公司内部治理结构效应比较

本文以深沪两市1039家上市公司2001—2005年的严格平衡面板数据作为样本.实证分析了外部治理环境的不同程度和公司内部治理结构的不同安排对公司价值的影响效应,并分行业细分了这种影响效应的差异。实证回归的结果发现。在外部治理环境当中只有法治化水平对总体样本的上市公司价值有显著的影响作用.而在公司内部治理结构当中则证实了正U型的股权结构效应。此外.外部治理环境与公司内部治理结构对公司价值的影响效应会因行业而有所差异。然而。从整体上看.前者的效应都明显地小于后者。研究结果表明。对于中国特殊的证券市场环境而言。同样存在着公司内部治理结构的合理安排可以作为公司价值保护机制的可能性。     

Who should be the respondent? Comparing predictive powers between managers' and employees' responses in measuring high-performance work systems practices

This study first examines the association between the effectiveness of high-performance work systems (HPWS) and two types of firm performance (the financial performance and productivity of a firm) in Korea and then compares the relative predictive power between employee responses and manager responses. The results indicate that the effectiveness of HPWS has a statistically significant positive effect on firm performance and that employee perception of the effectiveness of human resource (HR) practices explains more variance in the financial performance and productivity of firms than does managers' corresponding perception. This study highlights the importance of a firm's employees as a source of HR information.