A NOTE ON ARBITRAGE AND CLOSED CONVEX CONES

We give an example of a subspace K of     such that     , where     denotes the closure with respect to convergence in probablity. On the other hand, the cone   C ≔ K − L ^∞₊  is dense in   L ^∞  with respect to the weak-star topology  σ( L ^∞, L ¹)  . This example answers a question raised by I. Evstigneev. The topic is motivated by the relation of the notion of no arbitrage and the existence of martingale measures in Mathematical Finance.     

LABOUR SUPPLY ESTIMATION AND PUBLIC POLICY

Abstract. Economists devote considerable energies towards refining their econometric techniques to overcome difficulties connected with conducting empirical research. Despite advances in technique. it is not clear whether further refinement in this direction is worthwhile for policy purposes. It may be that no further amount of statistical adjustment of inadequate data will increase understanding, and that better data is simply necessary to add to our knowledge. But rarely is sufficient credit paid to new forms of data. In short, econometric technique is emphasized to the neglect of data innovation, as if new data were merely lying about waiting for an ingenious suggestion for use. This paper surveys advances of the last twenty five years in estimating labour supply for policy purposes with a view towards appreciating the relative contribution of both improvements in econometric technique as well as developments of new data.
After briefly detailing the key parameters which economists have sought to estimate, we describe the early 'first generation' research (circa 1970), which is plagued by problems of unobservable variables, measurement errors, truncation and selectivity bias, and non linear budget constraints. 'Second generation' research constitute attempts to resolve one or more of these difficulties, and the respective contribution of econometric technique and new data is acknowledged and assessed, including the contribution of data generated by large scale social experiments in which participants are randomly assigned to different guaranteed income plans and their labour supply behaviour measured.     

The victim matters – experimental evidence on lying,moral costs and moral cleansing

In an experiment on moral cleansing with an endogenously manipulated moral self-image, we examine the role of the addressee of an immoral action. We find that cheating is highest and moral cleansing lowest when subjects cheat at the expense of the experimenter, while cheating is lowest and moral cleansing highest once cheating harms another participant. A subsequent measurement of subjects’ moral self-image supports our interpretation that the occurrence of moral cleansing crucially depends on the moral costs resulting from immoral actions directed at individuals in different roles. Our results can help to explain the different propensity to cheat and conduct moral cleansing when immoral actions harm either another person or representatives of organizations.     

论信用概念的本质内涵与信用建设的基本途径

在时下的信用问题研究背景中,经济学一家独语的状况非常明显;即便是在伦理学研究背景下,信用也仅被作为一个关键概念局限于经济伦理领域。但是,要建立一个科学的社会信用制度体系,信用就应该首先被还原出它的作为一个一般伦理学概念的内涵,即它的本质内涵。当代的中国信用建设,仅仅局限于经济学或经济伦理领域来讨论具体的制度建构,无疑要走很多弯路。信用这个概念,正如诚信概念一样,不仅存在于人的经济活动领域,也存在于人的其他重大活动领域。在这些人的种种活动领域中广泛存在的信用概念是紧密联系和互动的,并且存在一定的同步性需求,这种需求的理论化,就是信用概念在一般伦理学语境下的充分讨论。     

Expected utility theory and experimental utility measurement, 1950–1985. From confidence to scepticism

Abstract

The paper reconstructs the history of the experimental attempts to measure the cardinal utility of money between 1950 and 1985 within the framework provided by expected utility theory (EUT). It is shown that this history displays a definite trajectory: from the confidence in EUT and the EUT-based measurement of utility of the 1950s to the scepticism that, from the mid-1970s, haunted the validity of EUT as well as the significance of the utility measures obtained through it. By exploring the diverse aspects and causes of this trajectory, the paper covers new ground in the history of both decision theory and utility measurement.     

美国联邦宪法基本人权保障的发展路径

从中世纪英格兰开始,再延续至北美殖民时代,对普通法体系建立和权力法案的形成沿革进行详细的阐述,以美国独立宣言、宪法前言及人权典章所构筑的宪法优先原则,透过美国联邦最高法院的审查,形成限制国家权力的框架,具体落实宪法规范之最高性及权力分立,借此保障基本人权。     

风险投资环境的描述框架及我国风险投资环境分析

从影响风险投资环境的因素分析入手,依据给出的分析框架从科技与产业基础、技术与资本市场、基础性环境三个方面对我国风险投资环境状况进行了分析并提出了相关对策建议。从总体情况看,我国风险投资环境与发达国家相比虽然有一定差异,但快速发展风险投资的环境条件已基本具备。     

China’s house price: Affected by economic fundamentals or real estate policy?

Many theory and empirical literature conclude that house price can reflect economic fundamentals in the long-term. However, by using China’s panel data of 35 main cities stretching from 1998 to 2007, we find that there is no stable relationship between house price and economic fundamentals. House price has deviated upward from the economic fundamentals since government started macro-control of the real estate market. We consider that the mechanism between the house price and economic fundamentals is distorted by China’s real estate policy, especially its land policy. Meanwhile the policy itself is an important factor in explaining the changes of China’s house price. Then we estimate the dynamic panel data model on house price and the variables which are controlled by real estate policy. The result shows: land supply has negative effects on house price; financial mortgages for real estate have positive effects on house price; and the area of housing sold and the area of vacant housing, which reflects the supply and demand of the housing market, has negative effects on house price. We also find some differences in house price influence factor between eastern and mid-western cities. Finally, we propose policy suggestions according to the empirical results.     

中国经济奇迹原因探析——全球视野中的中国道路

中国改革开放以来的经济奇迹震撼了世界,其根本原因在于：中国不相信任何教条,从国情出发走出了一条适合自己的现代化道路——中国特色社会主义道路.中国特色社会主义制度是中国奇迹的根本保障.新中国前30年的经济建设成就则为后来的经济起飞奠定了雄厚的物质基础.