Why Does it Matter that Beliefs and Valuations be Correctly Represented?

This paper contains an analysis of a simple principal-agent problem illustrating possible problems that may arise when the prinicpal ascribes to the agent subjective probabilities and utilities that are implied by the subjective expected utility model but do not represent the agent's beliefs and valuations. In particular, it is possible that an incentive contract designed by the principal indices the agent to choose an action that is not in the principal's best interest.principal agent theory;moral hazard

Analisis Efisiensi Sumber dan Penggunaan Modal Kerja pada PT Tri Anugrah Pratama Pekanbaru

This study aims to determine the level of efficiency of PT Tri Anugrah Pratama Pekanbaru in managing the sources and uses of working capital to maintain the continuity of the companys operations and to analyze the contribution of the use of their own capital and bank capital to the development of corporate profits. This research was conducted in PT Tri Anugrah Pratama Pekanbaru is located at Jln Parit Indah Grand Sudirman Pekanbaru. In this study using secondary data in the form of: 1) The financial statements of the company for 5 years 2008-2013 and 2) Financial ratios. Analysis of the data used in this research is descriptive quantitative method. The study states that in order to measure the efficiency of the sources and uses of working capital, the working capital position of the company need to be analyzed by using the ratio of liquidity, solvency and profitability. Analysis of the reports and sources and uses, and analyzes the companys cash flow statement shows that the sources and uses of working capital has not been effective and efficient. PT Tri Anugrah Pratama are in a liquid state and insovable. More corporate capital derived from medium-term debt and long-term comparison of capital it self. This condition causes the contribution of working capital in the profit has decreased, it is because the company charges them interest on bank loans which is quite large.Keywords: Efficiency, Resource Management, Working Capita

Isolation of cationic and neutral (allenylidene)(carbene) and bis(allenylidene)gold complexes.

The one-electron reduction of a cationic (allenylidene)[cyclic(alkyl) (amino)carbene]gold(i) complex leads to the corresponding neutral, paramagnetic, formally gold(0) complex. DFT calculations reveal that the spin density of this highly robust coinage metal complex is mainly located on the allenylidene fragment, with only 1.8 and 3.1% on the gold center and the CAAC ligand, respectively. In addition, the first homoleptic bis(allenylidene)gold(i) complex has been prepared and fully characterized

DOI 10.1007/s11166-012-9157-1 Ambiguity attitudes and social interactions: An

Abstract This paper reports the results of experiments testing prevalence of nonneutral ambiguity attitudes and how these attitudes change as a result of interpersonal interactions. To address the first question we conducted experiments involving individual choice between betting on ambiguous and unambiguous events of the subject’s choice. We found that a large majority of subjects display ambiguity neutral attitudes, many others display ambiguity incoherent attitudes, and few subjects display either ambiguity-averse attitudes or ambiguity-seeking attitudes. To address the second question we designed a new experiment with a built-in incentive to persuade. We found that interpersonal interactions without incentives to persuade have no effect on behavior. However, when incentives were introduced, the ambiguity neutral subjects were better able to persuade ambiguity seeking and ambiguity incoherent subjects to adopt ambiguity neutral choice behavior and, to a lesser extent, also ambiguity averse subjects. We are grateful to Stefan Trautmann, Peter Duersch, Luca Rigotti and an anonymous referee for their useful comments. We also benefited from comments and suggestions of the participants of the conference on “Ambiguity: Theory and Experiments, ” at the Center for the Economic Analysi

Sequence Specific Motor Performance Gains after Memory Consolidation in Children and Adolescents

Memory consolidation for a trained sequence of finger opposition movements, in 9- and 12-year-old children, was recently found to be significantly less susceptible to interference by a subsequent training experience, compared to that of 17-year-olds. It was suggested that, in children, the experience of training on any sequence of finger movements may affect the performance of the sequence elements, component movements, rather than the sequence as a unit; the latter has been implicated in the learning of the task by adults. This hypothesis implied a possible childhood advantage in the ability to transfer the gains from a trained to the reversed, untrained, sequence of movements. Here we report the results of transfer tests undertaken to test this proposal in 9-, 12-, and 17-year-olds after training in the finger-to-thumb opposition sequence (FOS) learning task. Our results show that the performance gains in the trained sequence partially transferred from the left, trained hand, to the untrained hand at 48-hours after a single training session in the three age-groups tested. However, there was very little transfer of the gains from the trained to the untrained, reversed, sequence performed by either hand. The results indicate sequence specific post-training gains in FOS performance, as opposed to a general improvement in performance of the individual, component, movements that comprised both the trained and untrained sequences. These results do not support the proposal that the reduced susceptibility to interference, in children before adolescence, reflects a difference in movement syntax representation after training

Facilitating the Expression of Emotions by Alleged Victims of Child Abuse During Investigative Interviews Using the Revised NICHD Protocol.

Children's testimony is often critical to the initiation of legal proceedings in abuse cases. In forensic interviews, the expression of emotions can powerfully enhance both the quality of children's statements and perceptions that their statements are coherent and credible. However, children rarely express their emotions when reporting abusive events. The Revised The National Institute of Child Health and Human Development (NICHD) Protocol (RP) was designed to emphasize socioemotional communication during forensic interviews and thus should be associated with more extensive and diverse expressions of emotions by alleged victims of abuse. The present study focused on forensic interviews (178 using the Revised and 100 using the Standard NICHD Protocol) with victims of physical child abuse whose allegations were corroborated using independent evidence. Detailed content coding showed that the RP was associated with the expression of more different emotions, more expression of abuse-related emotions, and more expression of emotions related to the interview context. Emotional expressiveness was associated with increased informativeness, and the association between the type of protocol and informativeness was fully mediated by emotional expressiveness. These results suggest that the Revised Protocol facilitates the expression of emotions by alleged victims of abuse in a way that enhances the value of children's testimony in multiple ways.Nuffield and Jacobs Foundation

Practice Makes Imperfect: Restorative Effects of Sleep on Motor Learning

Emerging evidence suggests that sleep plays a key role in procedural learning, particularly in the continued development of motor skill learning following initial acquisition. We argue that a detailed examination of the time course of performance across sleep on the finger-tapping task, established as the paradigm for studying the effect of sleep on motor learning, will help distinguish a restorative role of sleep in motor skill learning from a proactive one. Healthy subjects rehearsed for 12 trials and, following a night of sleep, were tested. Early training rapidly improved speed as well as accuracy on pre-sleep training. Additional rehearsal caused a marked slow-down in further improvement or partial reversal in performance to observed levels below theoretical upper limits derived on the basis of early pre-sleep rehearsal. This decrement in learning efficacy does not occur always, but if and only if it does, overnight sleep has an effect in fully or partly restoring the efficacy and actual performance to the optimal theoretically achieveable level. Our findings re-interpret the sleep-dependent memory enhancement in motor learning reported in the literature as a restoration of fatigued circuitry specialized for the skill. In providing restitution to the fatigued brain, sleep eliminates the rehearsal-induced synaptic fatigue of the circuitry specialized for the task and restores the benefit of early pre-sleep rehearsal. The present findings lend support to the notion that latent sleep-dependent enhancement of performance is a behavioral expression of the brain's restitution in sleep

Is interviewer support associated with the reduced reluctance and enhanced informativeness of alleged child abuse victims?

Child maltreatment victims are often reluctant to report abuse when formally interviewed. Evidence-based guidelines like the National Institute of Child Health and Human Development (NICHD) Standard Investigative Interview Protocol do not adequately address such reluctance because they are focused on cognitive rather than socio-emotional strategies. The present study was designed to determine whether the Revised NICHD Protocol, which emphasizes supportive interviewing more than the Standard Protocol does, might predict increases in the overall informativeness and reductions in the reluctance of alleged victims. A total of 254 interviews, 166 using the Revised Protocol and 88 using the Standard Protocol, were conducted with 4.06- to 13.98-year-old children (M = 9.20, SD = 2.49) who disclosed multiple incidents of physical abuse by their parents and were thus expected to be more reluctant than victims of extrafamilial abuse. We coded indices of interviewer support and question types, children’s reluctance, and informativeness in each utterance during the substantive phases of the interviews. The Revised Protocol was associated with better interviewer support and questioning as well as reduced reluctance and increased informativeness on the part of the children. These findings document the value of training interviewers to attend to the socio-emotional needs of suspected abuse victims during investigative interviews.Nuffield and Jacobs Foundations, Haruv Institut

Spherically symmetric relativistic MHD simulations of pulsar wind nebulae in supernova remnants

Pulsars, formed during supernova explosions, are known to be sources of relativistic magnetized winds whose interaction with the expanding supernova remnants (SNRs) gives rise to a pulsar wind nebula (PWN). We present spherically symmetric relativistic magnetohydrodynamics (RMHD) simulations of the interaction of a pulsar wind with the surrounding SNR, both in particle and magnetically dominated regimes. As shown by previous simulations, the evolution can be divided in three phases: free expansion, a transient phase characterized by the compression and reverberation of the reverse shock, and a final Sedov expansion. The evolution of the contact discontinuity between the PWN and the SNR (and consequently of the SNR itself) is almost independent of the magnetization of the nebula as long as the total (magnetic plus particle) energy is the same. However, a different behaviour of the PWN internal structure is observable during the compression-reverberation phase, depending on the degree of magnetization=2E The simulations were performed using the third order conservative scheme by Del Zanna et al. (2003).Comment: 11 pages, Latex, 22 Encapsulated PostScript figures, accepted f or publication on A&