北京市配送中心的选址研究

运用聚类分析对北京市配送中心的选址问题进行研究，北京市应将配送中心的地理位置确定为：海淀四道口、丰台玉泉营、莱广营、楼梓庄、青年路、久敬庄、海淀清河、丰台五里店，这样不但减少了配送中心的个数，而且在满足需求、提高服务水平及节约成本等方面也更具合理性。     

MF-多源治疗仪对高血脂大鼠血脂的影响

目的建立高血脂模型,探讨MF-多源治疗仪对高血脂大鼠各项血脂的影响。方法 wistar大鼠随机分为正常组和高血脂组。正常组用普通饲料饲养,高血脂组用高脂饲料喂养,喂养20天建立高血脂模型。模型建立后,重新分组,原正常组剩下的大鼠仍然是正常组(Ⅰ组),原高血脂组剩下的大鼠随机分成高血脂模型组(Ⅱ组)和MF-多源治疗仪照射组(Ⅲ组),其中Ⅲ组在MF-多源治疗仪照射15天后,对大鼠血脂水平、血液的生化指标和血流变学指标进行分析。结果表明:Ⅱ组与Ⅰ组比较,谷丙转氨酶、谷草转氨酶、总蛋白、白蛋白、总胆固醇、甘油三酯、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇、全血粘度、全血还原粘度、红细胞聚集指数等指标均有明显差异(P<0.05);Ⅲ组与Ⅱ组比较,谷丙转氨酶、谷草转氨酶、总蛋白、白蛋白、总胆固醇、甘油三酯、低密度脂蛋白胆固醇、全血粘度、全血还原粘度、红细胞聚集指数原等指标均有明显差异(P<0.05),而高密度脂蛋白胆固醇升高极显著(P<0.01)。这表明MF-多源治疗仪照射对高血脂症有良好的保健效果,对心血管疾病有预防作用。     

北京奥运废弃物物流管理对策研究

废弃物物流是衡量奥运会是否成功举办的重要因素.依据奥运废弃物物流特性、历届奥运会废弃物物流管理实践和北京奥运废弃物物流规模,提出了重视分类收集、完善运作模式等建议,可以为主管部门制定北京奥运废弃物物流管理政策提供支持.     

Pre-decisional information acquisition: Why do we pay too much for information? Brief report

People tend to acquire more information while making their decisions than a rational and risk-neutral benchmark would predict. We conduct a carefully designed experiment to derive five plausible reasons for pre-decision information overpurchasing. The results show that overpurchasing of information can be almost entirely explained by systematic information processing errors (misestimation or incorrect Bayesian updating), possibly caused by biased intuitive decision processes. Other factors, such as overoptimism about the validity of the new information, risk aversion, ambiguity aversion, and curiosity about (irrelevant) information, play at most a minor role. Our results imply that information overacquisitions are mainly driven by the overestimation of the usefulness of additional information.     

Rendite und Kapitalkosten

Zusammenfassung  Zur Bewertung von Investitionsprojekten mit mehrperiodigen Zahlungen werden die erwarteten Zahlungen mit geeigneten Kapitalkosten diskontiert. In dieser Arbeit wird gezeigt, dass die erwarteten einperiodigen Renditen nur unter bestimmten Annahmen die geeigneten Kapitalkosten darstellen. Wenn zwischen den einperiodigen Renditen Autokorrelation auftritt, ist ein zus?tzlicher Korrekturterm bei der Ermittlung der Kapitalkosten zu berücksichtigen. Im Falle unkorrelierter Renditen entspricht der stochastische Prozess der Renditen dem Prozess der Risikoaufl?sung.

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Summary  In this paper it is argued that the discount rates used for the computation of the present values of an investment project with cash-flows to be realized over several years have to be adjusted when the one-period returns of the investment project are autocorrelated. The formula of the correct discount rate is deduced. In the case of uncorrelated returns of the investment, the stochastic process of the returns and of the cost of capital are closely related to the process of the arrival of information over time.

Ich danke zwei anonymen Gutachtern für wertvolle Verbesserungsvorschl?ge an einer früheren Version des Aufsatzes sowie dem Verein zur F?rderung der Zusammenarbeit zwischen Lehre und Praxis am Finanzplatz Hannover e.V. für seine Unterstützung.     

《红楼梦》后四十回研究论文述要(1978-2010)

《红楼梦》后四十回一直是红学界的关注焦点。仔细分析1978到2010年《红楼梦》后四十回的研究状况可知,其间出现了两次关于后四十回的作者之争:即1978到1986年的第一次论争和2006到2010年的第二次论争;围绕着三个核心主题:以作者研究为中心,重点向与此密切相关的后四十回的价值评判与文本研究两大主题延伸。鉴于此,《红楼梦》后四十回后续研究要想取得新的突破,还应在回归文本的基础上开拓研究视野,并促使研究成果不断转化。     

企业物流外包中选取物流供应商的应用研究

本文针对企业物流外包问题,提出了选取物流供应商的一些指标因素.基于这些指标因素,给出了一种应用三角模糊数互补判断矩阵选取物流供应商的决策方法,并结合示例对该决策方法进行验证,为企业物流外包决策提供理论依据.     

Separating psychological momentum from strategic momentum: Evidence from men’s professional tennis

In dynamic contests, strategic momentum and psychological momentum potentially coexist, which makes it difficult to distinguish between the two. We employ the setting of professional tennis, which allows us to separate psychological from strategic momentum. In tennis, converting a break point potentially triggers both strategic momentum—due to a change in the relative position of the players—and psychological momentum—due to a change in the perception of the players. To distinguish between these two momentum types, we employ exogenously given interruptions. Interruptions are predicted to affect psychological momentum negatively, while leaving strategic momentum unaffected. Using 4930 game-by-game observations from 141 Grand Slam men’s single matches, we show that the breaking players’ probability of winning a game increases after converting a break point, which provides evidence for momentum. Moreover, we show that this momentum effect is negatively affected by an interruption. Thus, psychological momentum seems to be the main trigger leading to a performance increase after a converted break point.     

Gender Unemployment Dynamics: Evidence from Ten Advanced Economies

The paper investigates gender unemployment dynamics in 10 advances economies applying a recent methodology on widely available Labour Force Surveys data. We calculate the job finding and separation rates for each gender and use them to construct the steady‐state unemployment gap as well as two counterfactual gender unemployment gaps: one generated by differences only in job finding rates and the other by differences only in separation rates. We find that in all countries the gender unemployment gap attributed to differences in the job finding rate is lower than the gap attributed to differences in the separation rate, suggesting that gender differences in the separation rate are the major factor behind the gender unemployment gap.