对“经济过热”的理性思考

自2003年以来,我国经济一直保持在10%以上的增长速度。对此,许多人认为,中国经济增长过快,已处于过热的状态。本文从三大角度:即从经济过热含义的角度、从经济过热表现的角度、以及从世界经济发展史的角度,来阐述我国经济,并得出中国经济并非处于过热状况的结论。此外,笔者简要分析我国经济现状,并给出了相关的政策建议,并认为对于误判经济过热可能会使我国失去发展经济的大好时机。     

区域性金融中心评价研究

本文在吸收现有金融中心评价指标体系优点的基础上,设计了一个区域性金融中心建设水平量化评价指标体系,以上海为参照系,对杭州和宁渡的区域性金融中心建设水平进行了实证评价,并依据评价结果提出了促进两市区域性金融中心建设的对策建议。     

Information aggregation in auctions with an unknown number of bidders

Information aggregation, a key concern for uniform-price, common-value auctions with many bidders, has been characterized in models where bidders know exactly how many rivals they face. A model allowing for uncertainty over the number of bidders is essential for capturing a critical condition for information to aggregate: as the numbers of winning and losing bidders grow large, information aggregates if and only if uncertainty about the fraction of winning bidders vanishes. It may be possible for the seller to impart this information by precommitting to a specified fraction of winning bidders, via a proportional selling policy. Intuitively, this could make the proportion of winners known, and thus provide all the information that bidders need to make winner's curse corrections.     

中国外汇储备增长对物价水平的影响

外汇储备快速增长与物价水平上升已成为我国经济中的两个突出问题。目前中外学者关于外汇储备与物价水平之间关系存在着不同观点;基于中央银行的资产负债表和货币数量理论,对外汇储备增长对物价水平的影响进行理论分析;表明：从长期来看,我国外汇储备增长可以通过影响货币供应量而间接影响消费物价指数,从而增加物价上涨的压力。     

语言符号任意性的限制刍议

古今中外的哲学家们和语言学家们就语言符号的音义之间的关系问题存在着任意论与理据论之争。语言符号任意性限制不仅表现在语音层面,也表现在语法层面。语言符号的任意性是有理据的任意性。     

Reducing Teacher Moral Hazard in the U.S. Elementary and Secondary Educational System through Merit-pay: An Application of the Principal–Agency Theory

America’s elementary and secondary educational system is faced with an inefficiency stemming from a basic problem associated with unobservability: moral hazard. In this case, the teacher (agent) has an incentive to exert less effort (given cost associated with more work) if the school district (principal) cannot distinguish between low student performance due to a lack of teacher effort and low student performance due low student quality (random variable). This research develops an optimal incentive scheme that guarantees the teacher a fixed payment, plus a variable payment that would be a function of teacher ‘action’ variables thereby reducing moral hazard.

Is living in African cities expensive?

Although several studies have examined why overall price levels are higher in richer countries, little is known about whether there is a similar relationship at the urban and city level across countries. This paper compares the price levels of cities in Sub-Saharan Africa with those of other regions by analyzing price information collected for the purpose of calculating official purchasing power parities. The approach of the paper is to readjust the calculated price levels from national to urban levels, using known price-level ratios between those areas. The results indicate that African cities are relatively more expensive, despite having lower income levels. The price levels of goods and services consumed by households are 25 to 28 percent higher in Sub-Saharan Africa than in other low- and middle-income countries, relative to their income levels. Such high costs of living could constrain livelihood of low-income urban residents, as well as the development of Africa’s urban economies.     

中国稀土产业生态效率研究

生态效率是评价资源可持续利用的重要指标,稀土资源是我国具有战略价值的资源,研究稀土产业的生态效率对我国实现经济、社会、资源和谐发展具有重要意义。本文参考相关研究将环境效率分解为源头循环效率、清洁生产效率、末端治理效率,从3个生产环节的生态效率协同发展角度度量稀土产业的生态效率,并对我国稀土产业2001～2012年间的生态效率作了实证分析,结论表明：我国稀土产业的生态效率提高空间仍然很大,生态效率的提高需要生态效率发展水平和生态效率发展质量的同时提高;我国稀土产业的生态效率提高仍然依赖生态效率发展水平的提高,应更加注重生态效率发展质量;在生态化改革过程中,3个环节的效率具有明显的次序性。     

战略性新兴产业与区域经济发展的耦合研究

通过选取多项指标构造了战略性新兴产业与区域经济发展耦合协调度模型,测算了2012年度我国31个省（直辖市、自治区）战略性新兴产业与区域经济系统的耦合作用水平,结果发现：①两者的协调度还处于中低水平,除个别发达省份以外,大多数省份战略性新兴产业发展对区域经济的促进作用滞后于区域经济对战略性新兴产业的刺激;②从空间分布上看,两者的耦合协调发展水平总体上表现为从东部向中西部地区不断下降的趋势。     

我国生产性服务业与制造业空间分布协匾效应研究

本文引入生产性服务业可得性和制造业可得性、劳动成本、知识密集度、交易成本、城市水平等概念,从理论层面分析了生产性服务业与制造业空间分布协同效应,并利用城市截面数据建立联立方程模型,对理论假说进行了检验。我们发现：生产性服务业与制造业之间存在空间分布协同效应;制造业集聚对生产性服务业可得性的影响较大;城市之间的生产性服务业与制造业的空间分布协同效应存在差异。此外,城市发展水平是通过影响生产性服务业和制造业的可得性,进而影响生产性服务业与制造业之间空间分布的协同效应。