陕西省城乡居民收入差距的实证分析

自1981～2005年的25年间,以5年为一个考察期,对陕西省城乡居民平均绝对收入差距、平均相对收入差距进行考察和分析,发现在5个考察期中,陕西城乡居民平均绝对收入差距呈现指数增长的趋势,平均相对收入差距也在不断的上升。笔者认为只有不断对二元制度进行一元化改革和调整,以及在对农业方面进行持续和力度足够投资的基础上,才能在根本上缩小陕西城乡居民收入差距,缓解由城乡收入差距带来的各种社会矛盾,从而有利于和谐陕西早日实现。     

The RAS Approach in Updating Input–Output Matrices: An Instrumental Variable Interpretation and Analysis of Structural Change

The main purposes of the paper are to reconsider the rationale of the RAS method, and to attempt to improve on its interpretation and usefulness. The substitution and fabrication factors in the RAS method are interpreted as statistical estimates obtained by the method of instrumental variables. This enables the computation of asymptotic standard errors for the factors and the relative precision of the predicted technical coefficients. Furthermore, an adjustment cost minimization model to describe how a sector determines its substitution and fabrication factors is presented. The solutions of the model provide another rationale for the RAS method, and the associated Lagrangian multipliers can be useful for assessing structural constraints and structural change.     

Non-convex optimal portfolio sets and constant relative risk aversion

This paper shows by example that, under constant relative risk aversion (CRRA), the set of optimal portfolios can be non-convex even in the presence of a complete set of Arrow-Debreu securities. This implies that, with exclusively CRRA investors, market models without a strong distributional assumption such as that of the capital asset pricing model cannot be tested by testing the optimality of the market portfolio, or by assuming a representative investor. This demonstration extends the key result of Dybvig and Ross [Dybvig, P. H., & Ross S. A. (1982). Portfolio efficient sets. Econometrica, 50, 1525–1546], who showed an example of non-convexity with less restrictive utility assumptions but which could not apply to the case of a complete set of Arrow-Debreu securities.     

The impact of MAS on perceived auditor independence-some evidence from Denmark

The Enron case has highlighted that the provision of management advisory services (MAS) can endanger auditor independence. Recently, a number of changes have not only been made to the relevant international and US regulations, but also to the Danish regulations in this area. Theoretical research explains the emergence of non-independence and demonstrates that the provision of MAS can decrease independence. According to the economic model of DeAngelo, the existence of client-specific quasi-rents impairs auditor independence. The provision of MAS increases quasi-rents and thus, is a threat to independence. Antle used an agency theoretical approach. Information asymmetries between auditor and client could lead to a moral hazard risk, i.e. the auditor could give up independence from client's management and accept payments for withholding detected errors and irregularities. The client's management could also use MAS to legally compensate the auditor for giving away independence.A large number of empirical studies have investigated the influence of MAS on the perceived independence of the auditor. Most of these studies were performed in English speaking countries and the majority found a negative impact. Sociological research reveals cultural differences between English speaking and Nordic countries, e.g. concerning the dimension ‘masculinity’. Thus, an empirical investigation of the impact of MAS on perceived auditor independence in Denmark is promising. It was found that shareholders, bank loan officers and journalists perceive a negative effect on auditor independence if MAS are provided. The recent liberalization in Denmark is inconsistent with this finding. Furthermore, it was shown that the type of MAS influences the degree to which auditor independence is perceived to be impaired. Thus, independence rules related to MAS should be differentiated. Additionally, the study ascertained that perceived auditor independence does not increase if MAS are provided by a separate department of the audit firm. An internal separation of the auditing and the consulting function within the same audit firm is not viewed as being beneficial in Denmark.     

Sexual Selection and Economic Positioning

Synopsis In their recent survey of Darwinian aesthetics, Grammer et al. (2003) note the surprising lack of a connection between studies related to human beauty and the theory of sexual selection. Understanding this missing link sheds new light on recent research that indicates positional concerns Pingle & Mitchell 2002, Solnick & Hemenway 1998, are important factors in the decision-making process. Integrating the theory of sexual selection into the decision framework found in economics makes it possible to explain why individuals are potentially willing to accept less, as long as it places them in a superior position relative to others.     

建立社会保险基金制度的相对平衡机制

建立社会保险基金制度的相对平衡机制,需要从理论与制度框架上理顺社会保险与政府的关系,确立政府在社会保险中的地位与职能,使财政从无限责任向有限责任转化,通过社会保险某些市场与技术等手段,增强社会保险制度的动机与活力,使社会保险基金制度的相对平衡机制进入良性运行轨道。     

从公司治理视角看会计政策选择

在介绍公司治理和会计政策选择的基本概念及其相互关系的基础上,重点阐述了各公司治理相关利益主体对公司治理机构中的制衡关系及其对公司会计政策选择的影响,最后提出从公司治理入手,提高会计政策选择的公允性。     

社会互动、相对财富关注及股市参与

已有的研究表明,社会互动推动了家庭的股市参与。依据社会互动推动家庭股市参与不同机制的理论基础和预测,本文对不同的具体机制进行了研究,我们发现在局部品支出比例高、收入分布集中度高的区(村),社会互动推动股市参与的作用更显著,这与外部习惯模型及相对财富关注模型的理论预测一致,事前对局部稀缺品的关注使得家庭的股市参与存在外部性。社会互动推动股市参与其他机制的理论预测则未得到数据的支持。     

Capital–Skill Complementarity and Inequality in Sweden

Income inequality increased in Sweden during the 1980s and 1990s, as did the returns to higher education. The main conclusion of this study is that increased income inequality between high‐ and low‐skilled workers is demand driven and is due to the presence of capital–skill complementarity in production. Increased investments in new, more efficient capital equipment, along with a slowdown in the growth rate of skilled labor, have raised the ratio of effective capital inputs per skilled worker, which, in turn, has increased the relative demand (and market return) for skilled labor through the capital–skill complementarity mechanism.     

关于DEA有效性理论的一点探索

给出经典的基于输入和输出的DEA模型,把基于DEA模型相结合的相对效率模型引入评价证券相对有效性,以风险作为输入,期望收益率作为输出,便可以用DEA模型评价每只证券相对有效性。