Selective imitation of the passive construction through modeling

Six 4- to 5-yr-old subjects were exposed to five sessions in which an adult model used passive sentences to describe a set of modeling stimuli. Probe stimuli, which the subjects were asked to describe without benefit of modeling and without selective reinforcement were interspersed among modeling stimuli. A matched group of control subjects received probletrials but no modeling trials. Both groups of subjects were subsequently tested on their ability to comprehend active and passive sentence forms. Every subject in the experimental group produced passive sentences on probe trials even though there was considerable variability in the number of passives produced. No control subject produced passives. The modeling procedure increased the comprehension scores of the experimental group above those of the control group though the scores of both groups were above chance. The results were contrasted with earlier studies in which modeling was ineffective in producing passive usage and in which comprehension of the passive was not demonstrated by even older children.     

塞勒关于行为金融学的实证研究及其理论贡献

理查德·塞勒(Richard H. Thaler)是行为金融学的主要创建者。全文按照行为金融学的发展脉络, 在简单介绍了行为金融学诞生的前提条件及理论基础之后, 详细介绍了塞勒等学者关于股票的输家-赢家效应、封闭式基金之谜以及股权溢价之谜的实证研究及其理论观点, 展示了塞勒等学者如何巧妙地以真实金融市场上的产品以及投资者的行为为样本, 通过对这些数据的挖掘、提炼以及模拟, 揭示出投资者的信念、情绪等心理因素是导致上述金融“异象”的主要原因。对这些现象的研究, 使得塞勒脱离了传统金融学研究的窠臼, 倡导了金融学研究中关注个体行为及心理因素的研究取向, 促成了行为金融学的发展与壮大。     

Concomitant changes in classically conditioned heart rate and corneoretinal potential discrimination in the rabbit (Oryctolagus cuniculus)

Corneoretinal Potential (CRP) and heart rate changes were measured in a series of differential classical conditioning experiments in which the directionality of the heart rate response was related to (a) CRP acquisition, and (b) the certainty or uncertainty of the stimulus situation. The results suggested that heart rate decelerations were associated with stimuli that predict upcoming aversive events, while heart rate accelerations were associated with asymptotic CRP responding late in conditioning. These findings were interpreted in terms of (a) changes in general somatic activity, and (b) the cue properties associated with CSs which predict aversive events.     

Religion and Derivative Use: Evidence from the Hedge Fund Industry

We examine how local religions influence derivative usage in the hedge fund industry. Measuring religiosity by the ratio of religious adherents in the county of a U.S. hedge fund headquarters, we find that religiosity is negatively related to the probability of hedge funds using derivatives for speculative purposes. In contrast, funds in regions with higher ratios of Catholics to Protestants are more likely to engage in speculation-based trading of derivatives. Finally, we show that the effects of local religion are more pronounced if the hedge fund size is small. Overall, our study highlights the significant role of local religion in shaping the purpose of hedge fund derivative usage.     

Scientific misconduct: The lessons of time

Conclusions Pascal’s paper indicates how far we have come. Now as then, however, there is a need to reflect from outside the cocoon of our agencies, institutions, and disciplines to behold the enterprise that shapes both our behavior and our interpretations of it. For the boundary separating propriety from impropriety continues to move. Just as science, and the knowledge it begets, continues to evolve, so must our collective standards. The lessons of time include this: ORI or biomedical research is no island; each is connected to a body of practitioners who are accountable to a society that is ever-more skeptical of expert knowledge and the institutions entrusted with its development. We are participants in a process of “continuous improvement”, not occupants of a state of grace. For the good of the enterprise we cherish, it is best that we all remember that. The views expressed here are the author’s own and reflect neither those of NSF nor of the National Science Board.     

19世纪西方医学对精神疾病诊治的影响

精神疾病是现代困扰人类的主要疾病之一.通过总结19世纪西方医学对精神疾病的认识及主要治疗方法,拟展现这个世纪中治疗方法随观念变化和实践深入而发展的轨迹,旨在说明19世纪是西医精神病学发展史上的重要时期,并揭示其与现代精神疾病治疗的历史传承性.     

A Case Study of Ethics and Mutual Funds Mismanagement at Putnam

This case study examines the failure of top management at Putnam to exercise ethical behavior in the face of their clear knowledge of corruption in the company. Market timing by employees was expressly forbidden by Putnam. Six employees, including two portfolio managers, repeatedly engaged in market timing activities from 1998 to 2003, garnering over a million dollars in personal profit. The CEO and key senior executives had factual knowledge of the abuses. Management failed to stop the abuses or to discipline those involved until faced with charges from government regulators. By failing to do so, top management breached ethical duties to its shareholders and inflicted serious damage on the organization. The end results of top management's failure to address ethical violations were significant outflow of assets from Putnam's funds, payment of penalties, and loss of trust among investors. This case raises awareness about ethical issues surrounding mutual fund trading practices and the impact that top management can have on the ethical behavior of employees.     

Mutual Funds Efficiency Measurement under Financial and Social Responsibility Criteria

Socially responsible investors pursue financial as well as nonfinancial goals. Whereas the role of financial criteria in investment decisions is well understood, much less is known on the influence of social responsibility considerations. This work seeks to integrate both dimensions within a data envelopment analysis framework consistent with second‐order stochastic dominance efficiency. We compare the performance of conventional versus socially responsible mutual funds on an empirical data set. Our data do not support the conjecture that conventional mutual funds exhibit superior overall performance. Copyright © 2013 John Wiley & Sons, Ltd.