事物属性的凸现性与相关真理问题——由强控型实验所引起的联想

事物的属性在本质上是作为系统的事物所具有的系统质,因而具有凸现性。它们既可以凸现于组成事物的要素间相互作用的过程中,又可凸现于事物同其环境相互作用的过程中。因此,权变的观念应当影响我们对事物属性的认识和我们对真理的看法。     

浅论图书馆在开放教育中的服务创新

开放教育是教育中的新体系。在这个新体系中,图书馆的作用是显而易见的。尤其是开拓现代化服务的新方式,是适应开放教育发展不可缺少的重要环节。     

应用先进实验设备提高机电专业实践教学效果

文章结合机电学院的实际情况,分析新形势下的机械制造专业的发展方向,说明必须重新规划实验室,引入先进实验设备以应对新课程的需要,并根据机电学院情况,重点介绍了创新设计、自动化、计算机技术等几类实验装备及其应用情况,对未来发展也提出了若干建议.     

Out-of-pocket vs. out-of-investment in financial advisory fees: Evidence from the lab

The implications of the method of payment to financial advisors on the behavior of individuals are of interest to economists and regulators around the globe. This paper uses an experimental approach to compare two common alternative forms of payment. The first is “out-of-pocket” (an upfront payment from a checking account), and the second is “out-of-investment” (a deferred payment from an investment portfolio account). We document that for the same financial advice, the subjects in the first treatment were willing to pay on average 25 per cent less than the subjects in the second treatment – payment following an investment outcome knowledge, where the payment was framed in terms of gains. We introduce an additional out-of-pocket payment structure where the actual payment is deferred until after the subject discovers the outcome of the investment. Thus, the design can be broken down into two distinct possible effects, an out-of-pocket vs. out-of-investment framing effect and a pre-outcome vs. post-outcome timing effect. We find that the timing effect is the key element: across out-of-pocket payment structures, the subjects were willing to pay significantly less in the pre-outcome treatment than their counterparts were in the post-outcome treatment. Our results highlight the difference between post-service and pre-service payments in a broader context, and provide an explanation for why allowing late payment, after the service has been performed and its outcome revealed, may increase the ex-ante willingness to pay for the service.     

Barriers to finding and maintaining open employment for people with intellectual disability in Australia

Everyone has the right to employment. Work is important for health, well-being, and social, economic, and financial inclusion. However, it is often difficult for people with intellectual disability to find and maintain work, especially in the open labour market. Policy challenges remain about who can access open employment (also sometimes called competitive or supported employment) and how often people with intellectual disability do so. Greater understanding about the barriers that people with intellectual disability encounter when they try to find and keep work in open employment is needed. Drawing on research with 51 people with intellectual disability in Australia, this paper examines the systemic barriers they report to finding and maintaining work in open employment. The findings highlight that the barriers they experience stem from narrow, dismissive, and discouraging attitudes to their work in open employment and from a spectrum of experiences of stigma and discrimination in open workplaces. The paper thus provides new knowledge about reasons that people with intellectual disability may either reject or not continue in open employment and take up less inclusive work options. The paper discusses the implications of the findings, including the need for policy development for attitudinal change, designing more varied roles for employees with intellectual disability, ensuring access to industrial relations protections, and increasing and better regulating and funding requirements on support to people with intellectual disability who are seeking work in open employment.     

交通基础设施对农户人力资本投资的影响——基于准自然实验的因果推断分析

使用CFPS 2010和CFPS 2014家庭面板数据,以开通公路和公交作为准自然实验,研究了交通基础设施对农户人力资本投资的影响。基于PSM-DID方法的结果表明:通过增收效应和文化冲击等途径,交通基础设施能够显著改善农户的教育观;进而促进农户提高物质和非物质人力资本投资;这有利于端正农村青少年的学习态度,并最终有利于提高农村青少年学业成绩。所以应继续加强城乡间交通基础设施建设,以激发农户和农村青少年对教育的内生追求动力,促进农村人力资本积累。这不仅有利于推动教育公平,也有利于为“三农”注入内生发展动力,具有一定的社会和经济意义。     

Informational Asymmetries and Observational Learning in Search

As economics modeling moves from super rational decision makers to considering boundedly rational agents, some economic problems deserve a second look. This paper studies the effects of learning on the efficiency of search. Once learning is taken into account, the structure of information flow becomes important. In particular, I highlight the truncated information structure in the search problem. Agents stop searching once a sufficiently attractive price is found. Therefore, they observe the performance of shorter searches, but do not directly observe the performance of longer searches. I design and conduct an experiment to test the hypothesis that this asymmetric flow of information leads agents to search too little. I find strong evidence in its favor. This suggests that in the presence of learning, the provision of a more symmetric information structure will make search more efficient.JEL Classification: C91, D83     

Two concepts of conditionality

Birnbaum's proof that C and M imply L, would lose its force if it is shown that in some situations M is not acceptable. Godambe (1979) has shown that Birnbaum's M is not as obvious or intuitive as the concept that a ‘mere relabelling’ of sample points should make no difference to the interference that can appropriately be drawn from a particular outcome of a given experiment. Akaike (1982) has shown that in certain situations M amounts to the assertion that a relabelling of sample points involving a false reporting of the outcome of an experiment should make no difference to the inference drawn from a particular outcome of a given experiment. It is shown in this paper that in the situation discussed by Akaike, even if M were to be considered acceptable, it is only a modified conditionality principle C? and M which can formally imply L; Birnbaum's conditionality principle C and M do not imply L.     

开放式创新视角下政用产学研联动机制研究

开放式创新2.0要求政用产学研协同创新。基于该背景,构建政用产学研一体化创新模型,将五个主体归为四大创新要素,设计构建协同创新“正四面体”模型。通过对正四面体各要素间动态关系的系统深入研究,最终建立在资源信息交互环境下以政府为主导、其他要素相互作用的政用产学研联动模型,并针对企业、政府、用户三个方面提出建议,对推动制造业转型升级具有重大意义。     

Evaluation of open items using the many-facet Rasch model

The goal of this study is to analyze the quality of ratings assigned to two constructed response questions for evaluating the written ability of essays in Portuguese language from the perspective of the many-facet Rasch (MFR [15 J.M. Linacre, Many-facet Rasch Measurement, 2nd ed., MESA Press, Chicago, 1994. [Google Scholar]]) model. The analyzed data set comes from 350 written tests with two open-item tasks that were developed based on a rating process independently marked by two rater coordinators and a group of 42 raters. The MFR model analysis shows the measurement quality related to the examinees, raters, tasks and items, and classification scale that has been used for the task rating process. The findings indicate significant differences amongst the rater severities and show that the raters cannot be interchanged. The results also suggest that the comparison between the two task difficulties needs further investigation. An additional study has been done on the scale structure of the classification used by each rater for each item. The result suggests that there have been some similarities amongst the tasks and a need of revision for some criteria of the rating process. Overall, the scale of evaluation has shown to be efficient for a classification of the examinees.