农村土地流转模式及其效应与创新

农村土地流转是发生在我国农村的重要社会经济现象,既关系到土地供给的总体结构及其变化,也关系到城市化和工业化进程,更关系到耕地保护与利用,从而关系到国家和地区粮食安全。我国实行统一的、最严格的以保护耕地为基本出发点的土地管理制度,但各地由于在农村土地流转方面所面临的问题不同,土地流转的形式和方式也不尽相同,形成了包括转包、互换、转让、出租、入股、置换、重组、兼并、股田等在内的土地流转模式。各种土地流转模式对耕地保护及粮食安全等方面均有其不同的效应。随着农村改革的进一步深化,农村土地流转需要不断创新,包括宏观层面和微观层面的制度创新,这种创新应以保护农民利益和保障粮食安全为基本宗旨。     

水质分析中测定总氮影响因素的探讨

针对总氮测定时遇到试验空白值偏高的情况,分析了实验环境、实验用水、试剂、玻璃器皿、消解过程以及所用设备等方面对空白值的影响,并提出减少空白值的对策。     

汇率变动、市场份额与中国纺织品服装出口竞争力

本文选取中国纺织品服装出口的主要海外市场——美国作为研究范围,将韩国、印度和巴基斯坦分别作为中国棉纱、棉机织物和服装成衣类纺织品出口的主要竞争对手,探讨在人民币实际有效汇率波动和贸易争端引起的市场份额不稳定的情况下,以上三类产品国际竞争力的不同表现及人民币实际有效汇率波动对中国以上三类产品价格的传递系数。研究结果显示:汇率变动对服装类和棉纱类出口价格影响具有完全传递性。导致汇率波动的压力直接传递到出口产品价格上;中国相对较高的市场份额对产品价格的积极影响力并不太大,而贸易争端导致的市场份额不稳定对以上三类纺织品的国际竞争力造成了不同程度的影响。     

棒槌花边的传承与发展

棒槌花边是山东地区的一种传统手工技艺,是艺术设计和工艺技术结合的产物,富有表现力和装饰性.文章以棒槌花边为研究对象,分析了此门技艺目前的困境,认为在保护传统手工艺的道路上,应该多方位进行协作,建立政府、研究机构、高校、生产企业等部门的广泛合作,多渠道进行探索、保护发展的新途径.以期为传统手工艺的传承和发展提供参考.     

The role of program fairness in asymmetrical channel relationships

Managing distributor compliance with manufacturer-initiated programs is critical to both program success and relationship enhancement. This study examines how a manufacturer might better motivate distributors with varying levels of dependence. Previous research suggests that two variables influence distributor compliance: economic incentives and dependence dynamics. Drawing from fairness heuristic theory, this study extends previous research by investigating the role of fairness in affecting compliance and long-term relationships. The authors observe the contingent effect of fairness along various levels of distributor dependence. In the context of a naturally occurring program, the authors collect data from a focal manufacturer's distribution channel and find that (1) fairness perceptions have significant impacts on both compliance and relational outcomes, (2) the efficacy of program fairness declines as distributor dependence increases, and (3) distributor dependence increases the effect of economic incentives on compliance. The authors discuss the theoretical and managerial implications of these findings.     

货币供给影响股票市场的协整分析

随着我国股票市场的发展,股票市场逐步成为货币政策的一个重要传导渠道,虽然我国股票市场发展还不够完善,规模较小,其作用的发挥也极为有限,但实践证明,货币政策的股票市场传导途径的作用正日益显现。文章运用单位根、协整检验和误差修正模型,探讨了我国货币供应量变动对股票市场的影响,得出货币供应量变动对股价指数存在长期均衡关系。     

Herding and bank runs

Traditional models of bank runs do not allow for herding effects, because in these models withdrawal decisions are assumed to be made simultaneously. I extend the banking model to allow a depositor to choose his withdrawal time. When he withdraws depends on his consumption type (patient or impatient), his private, noisy signal about the quality of the bank's portfolio, and the withdrawal histories of the other depositors. Some of these runs are efficient in that the bank is liquidated before the portfolio worsens. Others are not efficient; these are cases in which the herd is misled.     

高铁开通与城市创新研究综述

高铁网络的建设大大提高了中国铁路运输的效率,缩短了不同城市之间的时空距离,使居民在不同城市工作和消费成为可能。同时高铁服务通过加速人口和要素在区域间的流动,对城市之间的空间联系和城市社会经济的发展产生了重要的影响。高铁在影响经济格局的同时也深刻影响了区域的创新格局,现通过梳理相关文献,整理归纳了高铁开通对城市创新的影响及其作用机制,并对现有的实证研究方法进行总结。在此基础上提出目前存在的问题,为后续的研究指明方向。     

Optimal excess-of-loss reinsurance contract with ambiguity aversion in the principal-agent model

ABSTRACT

We discuss an optimal excess-of-loss reinsurance contract in a continuous-time principal-agent framework where the surplus of the insurer (agent/he) is described by a classical Cramér-Lundberg (C-L) model. In addition to reinsurance, the insurer and the reinsurer (principal/she) are both allowed to invest their surpluses into a financial market containing one risk-free asset (e.g. a short-rate account) and one risky asset (e.g. a market index). In this paper, the insurer and the reinsurer are ambiguity averse and have specific modeling risk aversion preferences for the insurance claims (this relates to the jump term in the stochastic models) and the financial market's risk (this encompasses the models' diffusion term). The reinsurer designs a reinsurance contract that maximizes the exponential utility of her terminal wealth under a worst-case scenario which depends on the retention level of the insurer. By employing the dynamic programming approach, we derive the optimal robust reinsurance contract, and the value functions for the reinsurer and the insurer under this contract. In order to provide a more explicit reinsurance contract and to facilitate our quantitative analysis, we discuss the case when the claims follow an exponential distribution; it is then possible to show explicitly the impact of ambiguity aversion on the optimal reinsurance.