中国A股权证市场投资价值研究

由于近年来权证市场的交易量巨大,对权证的研究逐渐成为证券市场的热点之一。通过对权证市场投资总体收益的研究表明,权证市场缺乏投资价值,权证二级市场上投资者遭受了严重的亏损,而其最主要的原因就在于券商不合理的巨量权证创设。     

增殖税对小企业和个体工商户非公平待遇问题

促进经济发展，解决中国就业问题，鼓励小型企业和个体工商业户的发展在当前显得尤为重要，但增值税现行征收制度对小型企业和个体工商业户极为不利。文章通过分析小型企业和个体工商业户在增值税中遭受的非公平待遇及产生的影响，提出改革增值税的建议和措施。     

禁渔制度的施行效果研究

为了有效削减捕捞强度,改善鱼类生存环境,减缓渔业资源衰退趋势,《中华人民共和国渔业法》特别规定施行禁渔制度。理论上能够实现这一目标吗?为此,本文重点分析了单独采用禁渔制度的预期效果,及禁渔制度同其它管理措施结合使用的预期效果,并在此基础上根据我国实行禁渔制度的具体情况提出了一些政策建议。     

高校体育与心理健康教育"协同效应"的理论研究

采用文献资料调研、访谈及专家咨询等研究方法,评述了高校体育与心理健康教育的研究现状和存在问题,用理论证明了体育与心理健康教育存在相互作用的协同效应。     

Etzioni versus Becker: Do Moral Sentiments differ from Ordinary Tastes?

There are two competing definitions of economics. One, exemplified in Etzioni's work, stipulates that economics is the study of one kind of ends, the pursuit of material benefits (welfare). This definition entails that material ends are incommensurable with moral ends. The other, expressed in Becker's work, registers that economics is the analysis of one aspect of all ends, optimization. This definition implies that material and moral ends are commensurable. The paper finds that each definition has its own shortcomings. The paper outlines an alternative view, illustrated by the difference between gifts and grants, which promises to supplant the shortcomings of each definition.     

Intra-metropolitan shifts in labor demand and the adjustment of local markets

I offer new evidence on the adjustment of local labor markets to geographic shifts in labor demand within US metropolitan areas using a unique data set in which metropolitan subregions are geographically matched across the 1970–1980 and 1980–1990 decades. The evidence uncovered paints the following picture. Workers, especially those with less education, make incomplete adjustments within metropolitan areas in response to intra-metropolitan demand shifts. Although blacks may not make especially limited adjustments, they have disproportionately suffered deleterious effects from job movements because the demand shifts have tended to be away from their places of residence.     

Concentration of competing retail stores

The geographical concentration of stores that sell similar commodities is analyzed using a two-dimensional spatial competition model. A higher concentration of stores attracts more consumers with taste uncertainty and low price expectations (a market-size effect), while it leads to fiercer price competition (a price-cutting effect). Our model is general enough to allow for the coexistence of multiple (possibly) asymmetric clusters of stores. We provide sufficient conditions for the nonemptiness of equilibrium store location choices in pure strategies. Through numerical examples, we illustrate the trade-off between the market-size and price-cutting effects, and provide agglomeration patterns of stores in special cases.     

Risks and Uncertainty Analysis on International Logistics

With the development of globalization, more and more companies are under global operation. What coming with it, on one hand is chance and opportunity; on the other hand is risk and uncertainty. This paper aims to specify the potential and current risks and uncertainty that may be met in international logistics, then seeks some practical methods to dodge and solve them.     

对重庆核心商圈和副商圈的对比分析

重庆作为长江上游的增长极,近几年经济发展迅猛。长久以来,解放碑商圈都处于重庆主城经济的主导商圈地位,而今沙坪坝、江北、杨家坪、南岸四大副商圈异军突起,与解放碑核心商圈形成了众星拱月的商圈经济格局。重庆商业经济凸显出前所未有的崭新格局,由此牵动了重庆商业经济结构的深层次变革。本文对目前重庆核心商圈和四大副商圈的现状进行对比分析并提出发展对策。     

Exchangeability, Correlation, and Bayes' Effect

We examine the difference between Bayesian and frequentist statistics in making statements about the relationship between observable values. We show how standard models under both paradigms can be based on an assumption of exchangeability and we derive useful covariance and correlation results for values from an exchangeable sequence. We find that such values are never negatively correlated, and are generally positively correlated under the models used in Bayesian statistics. We discuss the significance of this result as well as a phenomenon which often follows from the differing methodologies and practical applications of these paradigms – a phenomenon we call Bayes' effect.