我国整车与零部件产业共聚的空间分布研究

本研究利用我国整车与零部件产业2002～2012年的数据,分析了中国整车和零部件产业协同共聚的空间布局及其空间演化趋势,以期为我国汽车、零部件产业和区域经济发展提供借鉴意义。研究发现：我国整车产业布局与零部件产业布局存在显著的空间相关性;2002年我国省域样本中,山东、安徽、北京与天津的整车与零部件产业空间共聚趋势明显;而在2012年的样本中,辽宁、北京、天津、河北、湖北、安徽、江苏的共聚趋势明显,这些省份逐步形成了2个整车与零部件空间上协同共聚的群落,一个是以北京为中心,天津、河北、辽宁环绕的共聚群;另外一个则是以安徽为中心,湖北、江苏环绕的共聚群。     

利率调整的未预期成分对股市的影响效应研究

本文通过将利率调整分解为预期成分和未预期成分,建立扩展的指数广义自回归条件异方差模型,以分析中央银行利率调整的未预期成分对股市的影响.实证结果表明,利率调整的未预期成分与股市收益率负相关,一个百分点的未预期的利率变动将导致次日股市收益率反向变化0.34个百分点.同时,未预期的利率调整成分将导致次日的股市波动性降低,但利率调整后的第2个交易日股市的波动性又恢复到之前的水平.从利率调整后的第3个交易日开始,未预期成分对股市波动性的影响不再具有显著性,表明股市价格在2个交易日的时间里已经完全吸收了未预期利率调整的信息.     

我国铸币税规模及经济效应分析

铸币税是国家制造货币所得到的额外收入,本文通过测算1995-2007年我国铸币税规模,认为我国尚未充分使用铸币税工具,在目前经济危机时期,政府通过征收铸币税,运用财政赤字货币化的方法,就能够在国家刺激经济政策的同时,有效地控制国家的债务负担,从而实现对宏观经济的强有力的调控.     

地方政府债券法律问题之反思

地方政府债券存在《预算法》上的障碍,地方政府也难以成为债券的最终责任人。缺少完善的信息披露机制与权力制约机制,因而很难保证地方政府项目决策的科学性和对项目资金的法律约束。进一步理顺中央与地方的关系是解决问题的根本出路。     

长期资产减值准备:盈余质量与市场反应

对2001～2006年旧资产减值会计制度实施期间的相关数据进行检验,本文发现长期资产减值准备所产生的应计盈余明显地降低了会计盈余的质量。按长期资产减值准备的应计盈余所构建的逆向套利组合能获得显著的超额报酬率,长期资产减值准备的应计盈余与超额回报负相关,说明市场不能识别长期资产减值准备对会计盈余质量的影响。本文的结论支持新会计准则禁止长期资产减值准备转回的规定。     

城乡居民个人慈善捐赠行为差异实证研究——以辽宁省为例

借助CATI随机调查辽宁省14市及所辖农村中811名居民,采用独立样本T检验、单因素方差分析来研究人口统计学因素对个人日常捐赠行为和特殊捐赠行为的影响。研究发现：文化程度、职业、收入和政治面貌等因素对城乡居民的日常捐赠行为和特殊捐赠行为均有显著影响;性别、年龄和婚姻状况等因素对城市居民的特殊捐赠行为有显著影响,且不同年龄城市居民间的日常捐赠行为差异显著。最后,提出促进居民慈善捐赠的建议。     

Diffusion of mobile telephony: An empirical study in Taiwan

Mobile telephony penetration is a major indicator of mobile telephony diffusion. Taiwan had a mobile telephony penetration of 108% in 2002, ranking first in the world. This study analyzes this accelerated diffusion in terms of growth model and determinants of the diffusion rate. To eliminate the inherent uncertainty associated with choosing the optimal growth model, this study compares the performance of three conventional models, namely Gompertz, Logistic and Bass, to identify the most appropriate model, and to distinguish the forces driving the diffusion rate. Empirical results indicate that the most appropriate model is the Logistic model. Network externalities, which this study shows to be the same as the imitation effect in the Bass model, explain the superiority of the Logistic model. Moreover, market competition, which markedly reduces service prices, is identified as a primary driver of the diffusion rate of mobile telephony in Taiwan. Economic conditions, technological innovation and number of operators are insignificant factors. Finally, mobile telephony is a substitute for fixed-line telephony in Taiwan.     

The effects of ownership concentration and corporate debt on corporate divestitures in Chinese listed firms

This study examines how ownership concentration and corporate debt impact corporate divestitures in China. Corporate divestitures reduce the asset base of a company and the opportunity for expropriation by majority shareholders. In emerging economies, weak legal institutions, combined with equity ownership concentration and high corporate debt, allow majority shareholders to avoid such disciplines. Consequently, the relationship between these governance mechanisms and divestiture activity exhibits a pattern that is different from that in developed economies. Using archival data collected from 1,210 Chinese listed companies during 1999–2003, we found that ownership concentration by the largest shareholder depressed corporate divestitures both in state-controlled and in non-state-controlled firms. The negative effect of corporate debt on divestitures only existed for state-controlled firms. Our finding provides corroborating evidence for principal–principal conflicts in emerging economies. It suggests that corporate strategy in these countries can be better explained by taking into account the unique agency problems that are prevalent in these economies.     

高频焊管机焊接挤压力的微机自适应控制

本文针对高频焊管机焊接挤压的控制,提出一种离散 MRACS 的设计方法。所设计的自适应控制器不仅算法简单,容易实现,而且适用于非最小相位系统。理论分析和仿真实验表明,提出的控制系统结构合理,具有良好的跟随性能和强的抗干扰能力,适合在中、小型高频焊管机上应用。