概率准则下的两期投资决策问题

概率准则是以期望收益率为导向的, 是某些情况下投资者的投资决策准则, 它具有一定 的现实指导意义. 在一般情况下, 证券收益率在不同时期的概率分布会不同而且相关. 因此, 提 出了一类概率准则下的两期投资决策问题, 建立了其数学模型. 对于证券收益率为连续及离散 型随机变量这两种情况分别进行了讨论, 给出了求解最优策略的方法及投资决策的步骤, 并举 例予以了说明.     

投资方案内部收益率的分析

本文严格地证明了投资方案的内部收益率(IRR)与借款利率的关系,全部资金与自有资金的内部收益率的关系,以及不同的借款偿还方式对自有奖金内部收益率的影响。     

启蒙、精神还乡、家园意识的三重溃败——对鲁迅《故乡》主题的重新阐释

鲁迅作品的经典性表征之一在于它广多的阐释性.在传统的政治性、阶级性"偏读"中,"我"的情感体验与心灵历程或多或少被忽视了的.重新阐释<故乡>,也即细密梳理、勾勒、陈列"我"的精神与情感过程,重新界定<故乡>的自我纾解特质.     

Kumulation von Mikrodaten – Konzeptionelle Grundlagen und ein Vorschlag zur Realisierung

Zusammenfassung: In dieser Studie wird ein Konzept zur Kumulation von laufenden Haushaltsbudgetbefragungen im Rahmen des Projektes Amtliche Statistik und sozioökonomische Fragestellungen entwickelt und zur Diskussion gestellt. Dafür werden die theoretischen Grundlagen und Bausteine gelegt und die zentrale Aufgabe einer strukturellen demographischen Gewichtung mit einem Hochrechnungs–/Kalibrierungsansatz auf informationstheoretischer Basis gelöst.Vor dem Hintergrund der Wirtschaftsrechnungen des Statistischen Bundesamtes (Lfd. Wirtschaftsrechnungen und EVS) wird darauf aufbauend ein konkretes Konzept für die Kumulation von jährlichen Haushaltsbudgetbefragungen vorgeschlagen. Damit kann das Ziel einer Kumulation von Querschnitten mit einer umfassenderen Kumulationsstichprobe für tief gegliederte Analysen erreicht werden. Folgen sollen die Simulationsrechnungen zur Evaluation des Konzepts.

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Summary: In this study a concept for cumulating periodic household surveys within the frame of the project Official Statistics and Socio–Economic Questions is developed and asks for discussion. We develop the theoretical background and solve the central task of a structural demographic weighting/calibration based on an information theoretical approach.Based on the household budget surveys of the Federal Statistical Office (Periodic Household Budget Surveys and Income and Consumption Sample (EVS)) a practical concept is proposed to cumulate yearly household surveys. This allows a cumulation of cross–sections by a comprehensive cumulated sample for deeply structured analyses. In a following study this concept shall be evaluated.

     

大学生“自我”迷失现状剖析与引导

"自我"概念存在着"主体自我"与"客体自我"、"现实自我"与"理想自我"的冲突,不能妥善解决有可能导致"自我"迷失现象.大学生"自我"迷失现状既存在着不尊重爱惜生命、自毁或攻击他人危害社会的极端案例,但更多的是存在着自卑、孤独、焦虑、抑郁、厌学等一般情况.大学生"自我"冲突的原因在于"自我实现"受干扰,遏障碍与被积极关注的缺失.对策在于要帮助大学生认识自我,建立自我一致性;发现自我,秉持特立独行;发展自我,满足关注需要;完善自我,实现和谐统一.     

文化缺失:汉语古诗词英译之文化维度

由于中西方文化背景的极大差异,这就注定了汉英诗歌翻译时必然会出现文化缺失:归化缺失;删译缺失;意译典故造成文化的缺失;不同的文化传统造成文化接受缺失。这也就需要译者在认真读懂原稿的基础上懂得变通,抓住文化内涵的核心,由诗词的表层结构深入到其深层结构,尽力展现其"意"的传神和生动,从而在更高的层面上实现文化的沟通。     

《红楼梦》隐秘曹家历史考--元春判词考释(上)

《红楼梦》隐秘曹家历史考——元春判词考释(上)@王玉林$北京语言大学人文学院!北京100083~~~~~~     

网购环境下在线零售商的退货运费承担策略研究

在电子商务环境下，宽松的退货政策能够刺激需求，促进货品销量的增长，但与此同时也导致了退货量的增多。在面临高退货，特别是无缺陷退货不断攀升的挑战下，在线商家应如何制定合理的退货策略成为值得研究的一个问题。本文主要针对退货运费承担问题，重点比较消费者承担退货运费、商家承担退货运费、双方共同承担退货运费三种策略，探讨不同策略下在线零售商的最优定价及其盈利能力。研究结果表明：为实现利润最大化，在线零售商应根据商品的无缺陷退货比例特征选择相应的策略。具体而言，当商品的无缺陷退货比例较低时，宜采用消费者承担退货运费策略；当无缺陷退货比例高时，宜采用商家承担退货运费策略；当无缺陷退货比例居中时，宜采用共同承担退货运费策略。值得注意的是，退货政策的目的是为了刺激需求的增长，但有时退货政策对需求的促进作用不够理想，不能抵消退货的负面影响，那么这种情况下则无论无缺陷退货占比如何，在线零售商的最佳退货策略只能是让消费者承担退货运费，以此避免更多非理性退货行为的发生。     

Weight Loss Practices and Body Weight Perceptions Among US College Students

Objective: The authors assessed associations between body weight perception and weight loss strategies. Participants: They randomly selected male and female college students (N = 38,204). Methods: The authors conducted a secondary data analysis of the rates of weight loss strategies and body weight perception among students who completed the National College Health Assessment survey. Results: Half of respondents (50%) were trying to lose weight, although only 28% of students were overweight or obese. Also, 12% of respondents had inaccurate body weight perception. Women and men with inaccurate body weight perception were significantly more likely to engage in inappropriate weight loss strategies than were those with accurate body weight perception. Of all students attempting to lose weight, 38% used both diet and exercise. Conclusions: These data show that college students are interested in weight loss and that body weight perception plays an important role in the desire to lose weight.     

A comparison of risk transfer strategies for a portfolio of life annuities based on RORAC

This paper aims to compare different reinsurance arrangements in order to reduce the longevity and financial risk originated by a life insurer while managing a portfolio of annuities policies. Linear and nonlinear reinsurance strategies as well as swap like agreements are evaluated via a discrete-time actuarial risk model. Specifically, longevity dynamics are represented by Lee–Carter type models, while interest rate is modeled by Cox–Ingersoll–Ross model. The reinsurance strategies effectiveness is evaluated according to the Return on Risk Adjusted Capital under a ruin probability constrain.