基于城市能级提升的安徽江淮城市群空间结构优化研究

城市能级反映了城市经济的集聚—扩散能力和对区域经济发展的推动能力。通过建立城市能级评价指标体系,运用熵值法确定指标权重,构建城市能级评价模型的方法,从提升城市经济能级、潜力能级和支撑能级三方面,分析了安徽江淮城市群从雏形期到快速成长期城市能级的空间变化特征和发展趋势,提出了基于城市能级提升的江淮城市群重要节点城市的培育、空间优化路径及安徽江淮城市群融入长三角区域的"E"型空间结构优化模式。     

The Effectiveness and Efficiency of Active Labour Market Policies in Poland

Following the predominance of macroeconomic stabilisation policies and passive income support schemes in the first phase of transition, active labour market policies (ALMPs) have now come to play a more important role in transition economies. This paper looks at the Polish experience and provides empirical evidence on the effectiveness of ALMPs. We use the Polish Labour Force Survey of August 1994 in combination with its Supplement on the Evaluation of Labour Market Policies together with data on ALMP expenditure at the regional (voivodship) level. The macroeconometric analysis of the relationship between labour market flows and ALMP expenditure shows no significant effects. The microeconometric analysis reveals that ALMPs are not particularly well targeted at the problem groups in the labour market. That is, women and people with basic vocational education do not receive enough attention. As to the effectiveness of ALMPs, the paper shows that former participants cannot expect to find employment more easily than their peers who have been unemployed but have not been in a programme. Subjective evaluations of former participants also suggest that ALMPs, but especially works programmes, have not improved their chances to find a job. This revised version was published online in July 2006 with corrections to the Cover Date.     

我国铜市场形势分析与发展前景预测

90年代,与世界铜矿资源总量相比,我国铜资源是比较贫乏和短缺的,这种状况将延续到下一个世纪。本文对我国近五年的铜金属市场进行了跟踪分析,对进出口进行了统计和形势分析,并对铜产品的市场价格和产量进行预测,提出了研究对策和建议。     

学院计算机校园网的规划,设计与管理

校园网的建设对于提高我院的教学科研管理水平,营造高科技信息的教学科研实验环境,培养面向世界、面向未来的高层次经济管理专门人才有着极为重要的作用。本文就此讨论了我院校园网的建设规划以及设计的有关问题,并给出了校园网的拓扑结构及网络设备配置的基本方案,同时对今后校园网的管理与使用以及进一步的发展作了相应的论述。企望能以此得到各级领导及广大师生与研究人员对校园网的建设以更大的支持和参与。     

股市风险及其防范策略

目前东南亚地区发生的金融危机一波未平,又起波澜。金融风险成为人们讨论的热门话题。本文就我国股市风险产生的原因及防范策略阐述自己的看法。     

浅谈市场经济条件下内部审计的职能

市场经济条件下,如何正确认识和运用内部审计职能在国民经济发展中发挥作用,是摆在广大审计干部面前的重要课题。本文对内部审计职能的再认识和内部审计职能的运用进行了粗浅探讨。     

Real options and contingent convertibles with regime switching

We consider a firm with no assets in place but an option to invest in a project. The investment is irreversible but delayable in a regime-switching economy. The firm issues equity, straight bonds (SBs) and contingent convertibles (CoCos). We provide the closed-form prices for the firm׳s securities and the pricing and timing of the option. Our numerical analyses discover that issuing CoCos instead of SBs induces much less agency cost of debt. The agency cost is higher in a boom economy than in recession but the difference is small. There is a unique CoCos׳ conversion ratio such that the agency cost arrives at the minimum value zero. The inefficiencies arising from asset substitution and debt overhang are much more significant in recession than in boom. Only if the conversion ratio is not too small, the two inefficiencies disappear during boom periods. While the effects of the conversion rate on optimal capital structure and firm value and those of supervision and jump intensity on optimal CoCos׳ coupon are ambiguous and weak, the stricter the supervision or the longer the economy remains in recession, the less the option value and the optimal SBs׳ coupon.     

基于风险选择与投资收益的外汇储备币种结构研究

随着外汇储备规模的不断增加,国家外汇储备投资的风险偏好亦会发生相应的变化。借鉴 J. H.Makin(1971)的方法,构建外汇储备币种结构配置理论模型,讨论在效用最大化的情况下,储备资产投资如何在安全性、流动性和盈利性三原则间进行权衡。假设外汇储备仅投资于美元和欧元两种币种资产,选取2000年初~2014年第三季度的10年期美国国债和欧元区公债季度数据,运用协整分析、格兰杰检验等方法进行的实证研究发现：储备货币在外汇储备中的比重与储备货币收益率及其三阶矩显著正相关,国家外汇储备投资总体而言是风险规避型的。     

Distributional assumptions and a test of the dual labor market hypothesis

Recent application of the switching regression model to allocate workers into the primary and secondary labor markets is considered to be the best solution to the classification problem of the empirical testing of the dual labor market theory. In such models, normality of the error terms is assumed. This paper adopts the switching regression model to test the dual labor market theory by assuming different distributions of the error terms. The test results strongly support the dual labor market theory regardless of the assumption one makes about the error terms. However, the results indicate that different distribution can lead to different percentage distributions of workers in the two segments. In particular, the normal distribution generates more workers in the primary segment than the non-normal distributions. Therefore, care must be taken not to generalize the type of industries or occupations that fall under the primary and secondary segments. First version received: October 2000/Final version received: March 2002 RID="*" ID="*"  I would like to thank Kevin Lang, Robert Marshall, and two anonymous referees for their helpful comments. I am grateful for comments received from the session participants of the Western Economic Association International Conference, San Francisco, CA, June 28–July 2, 1996, and the Midwest Economic Association Conference, Kansas City, 1997. I thank George Bonney, the Chief Statistician of Fox Chase Cancer Center, Philadelphia for his comments. Any remaining errors are my responsibility. I gratefully acknowledge financial support from Penn State Research and Development Grant, 1995.     

省级节能发电调度试点实践及推广建议

实施节能发电调度是电力行业落实科学发展观的重要举措。介绍了河南、四川两省3年来开展节能发电调度试点工作的情况,总结了开展“上大压小”和节能发电调度在优化电源结构、降低煤耗水平及污染物排放方面取得的显著成果,针对试点中反映出来的问题,对今后进一步开展节能发电调度、推广试点经验,就市场机制建设、可再生能源项目建设、经济补偿政策和电网建设等方面提出了建议。