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61.
This paper addresses the so-called paradox of immigrant optimism, which accounts for the higher educational expectations of immigrant–origin children, compared to non-immigrants in destination countries, conditional on social background and school attainment. We are interested in clarifying whether the mechanisms behind this optimism are related to migrant selectivity or family migration experience. To do this we use data from the China Education Panel Study, a representative survey of junior high school students in China. We use a two-pronged analytical strategy. Firstly, we look at whether having experienced family migration (within China) is associated with higher educational expectations. Secondly, we take a step back and explore whether adolescents who wish to migrate themselves when they grow up report higher educational expectations. Our findings confirm that adolescents who wish to migrate themselves when adults are already more optimistic even before any intentions of moving come to fruition. This we take as an indirect proof of selectivity. In contrast, we find no effect of family migration on expectations.  相似文献   
62.
We present an experimental study of the price‐setting newsvendor problem, which extends the traditional framework by allowing the decision maker to determine both the selling price and the order quantity of a given item. We compare behavior under this model with two benchmark conditions where subjects have a single decision to make (price or quantity). We observe that subjects deviate from the theoretical benchmarks when they are tasked with a single decision. They also exhibit anchoring behavior, where their anchor is the expected demand when quantity is the decision variable and is the initial inventory level when price is the decision variable. When decision makers set quantity and price concurrently, we observe no significant difference between the normative (i.e., expected profit‐maximizing) prices and the decision makers’ price choices. Quantity decisions move further from the normative benchmarks (compared to when subjects have a single decision to make) when the ratio of cost to price is less than half. When this ratio is reversed, there is no significant difference between order levels in single‐ and multi‐task settings. In the multidecision framework, we also observe a tendency to match orders and expected demand levels, which subjects can control using prices.  相似文献   
63.
This study examined the relationship of ambivalent sexism, political conservatism, demographic variables (age, education, and gender), and prior sexual experience to Turkish men s and women s attitudes toward women who engage in premarital sex. Participants included 124 Turkish undergraduate students and 60 nonstudent Turkish adults. Benevolent but not hostile sexism uniquely predicted more negative views of women who engage in premarital sex once other variables were controlled. Regression analyses demonstrated that for both men and women, older, more politically conservative and less sexually experienced respondents and more educated men (but not women) respondents were more likely to disapprove of women who engage in premarital sex. Similarly, regression analysis revealed that men who were older, politically conservative, and less sexually experienced expressed stronger preferences for marrying a virgin. Both hostile and benevolent sexism predicted men s preference for marrying a virgin after all other variables were controlled.  相似文献   
64.
义和团运动期间,当北方朝廷为恢复旧有统治对八国联军宣战时,南方督抚背离朝廷旨意与列强联手“互保“,南地绅士及知识界则以召开“国会”、举行起义等更为激进的方式对朝廷的举措表示反对。这种大致以南、北为界的政治分野的出现源于经济上的南富北穷、文化心态上的南新北旧、政治控制上的南松北紧。清朝廷在庚子年间的出格举动则是促使这种政治分野公开表现的直接原因。  相似文献   
65.
Value-added (quality) auditing is emerging as one of the most powerful tools for continuous quality improvement, with the introduction of the ISO 9001:2000 and ISO 19011 standards that focus team-based audits, proper auditor skills, process auditing, and effectiveness, etc. Formation of an effective quality audit team (QAT) based on the required auditor skills is therefore the initial stage of the value added auditing. QATs audit organizations at different locations with varying auditing requirements in order to evaluate an organization's own quality system (first party part audits according to IEC9001 Clause 8.2.2). The QAT consists of a lead auditor and one or more auditors that have the required skills in varying levels for the execution of an audit. For a successful audit, the formation of a QAT is vital since each audit team must at least fulfill the minimum requirements and skills needed for a specific audit. In this case study, a fuzzy mathematical-programming model and a solution algorithm based on “simulated annealing” is proposed for the formation of QATs. This is one of the first attempts in the literature to form this kind of teams analytically. Example problems are also solved in the paper to present the application of the proposed approach.  相似文献   
66.
Aviation Risk Perception: A Comparison Between Experts and Novices   总被引:2,自引:0,他引:2  
This article describes an exploratory investigation of the risk perceptions of experts and novices in relation to helicopter operations, under conditions where the participants are matched on various characteristics previously found to affect perceptions, such as demographic, gender, and background factors. The study reports considerable evidence of perceptual differences between the two participant groups (i.e., expert pilots and candidate pilots). We find that the experts' perceptions of relative risks are more veridical, in terms of their higher correlation with the true relative frequencies. A significant positive correlation between the flight hours and the contextual risk-taking tendency is also shown, leading the experienced pilots' choices toward risky alternatives in scenarios--a potential result of their overconfidence based on superior task performance. Possible explanations are offered for the findings and potential avenues for future research are identified.  相似文献   
67.
蒋北辰  张璐 《学术探索》2012,(4):127-129
"法治"是高校学生管理工作的必由之路,本文旨在通过揭示当前高校学生管理法治化的现实问题,探求高校学生管理法治化的有效途径。  相似文献   
68.
69.
尊敬的蒋正华副委员长、各位嘉宾、各位代表,同志们:九月的象山,秋风送爽,气候宜人。在这美好的金秋时节,经过精心筹备的中国海洋论坛今天在这里正式成立了,这是海洋资源开发保护史上的一件大事、喜事。在这里,请允许我代表中共宁波市委、市人大、市政府、市政协对中国海洋论坛的成立表示热烈的祝贺,向各位嘉宾和代表的到来表示热烈的欢迎。海洋是我们的蓝色国土,是人类可持续发展的重要基地,人类社会发展的历史告诉我们:向海则盛,背海则衰。翻开四千年的人类历史海洋的发展历史卷,我们更加深刻地认识到,海洋对于人类进步和社会发展是至关重…  相似文献   
70.
B   rdal   eno  lu 《Journal of applied statistics》2005,32(10):1051-1066
It is well known that the least squares method is optimal only if the error distributions are normally distributed. However, in practice, non-normal distributions are more prevalent. If the error terms have a non-normal distribution, then the efficiency of least squares estimates and tests is very low. In this paper, we consider the 2k factorial design when the distribution of error terms are Weibull W(p,σ). From the methodology of modified likelihood, we develop robust and efficient estimators for the parameters in 2k factorial design. F statistics based on modified maximum likelihood estimators (MMLE) for testing the main effects and interaction are defined. They are shown to have high powers and better robustness properties as compared to the normal theory solutions. A real data set is analysed.  相似文献   
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