汶川大地震后社会工作实务研究——以四川团省委的灾区社工为例

汶川大地震后社会工作的力量得到彰显与成长,四川团省委率先建立“12355李家杰珍惜生命心理热线社工服务队”,以承接灾区服务工作.灾区社会工作者如何实施具体实务,实施效果如何,面临的困境以及灾民是否接受这种全新的服务形式等,都是值得探究的问题,也是社会工作本土化过程中一笔宝贵的经验财富.     

The economics of food aid under subsistence farming with an application to Malawi

We investigate how food-aid affects price and production of staple food, with a partial equilibrium model with non-separable production and consumption. The model captures the key characteristics of sub-Saharan Africa subsistence economies. Simulations generate negative but also positive food-aid elasticities of production. Conditions are identified which mitigate the negative impact and support a positive impact. The share of domestic food production in total staple food demand (+) and the share of income from staple food production in total household income (−) are key determinants. Price and production equations, estimated with a panel of district data of the Malawi maize market for the period 1999–2010, show a small positive impact of food-aid. Large negative impacts of food-aid are not likely given production and income shares and behavioural responses.     

Use of minimum risk approach in the estimation of regression models with missing observations

This article considers a linear regression model with some missing observations on the response variable and presents two estimators of regression coefficients employing the approach of minimum risk estimation. Small disturbance asymptotic properties of these estimators along with the traditional unbiased estimator are analyzed and conditions, that are easy to check in practice, for the superiority of one estimator over the other are derived. Received May 2001     

基于缩短响应时间的供应链管理系统的实现

系统地研究了基于缩短响应时间的供应链管理模式,提出了四个订单流驱动的控制原理。以缩短供应链响应时间为目标,提出了基于Web的供应链管理系统解决方案。并实现了供应链管理系统的系统管理、客户关系管理、电子购销管理、合同管理、订单管理、仓储管理、运输管理和配送管理功能,该软件系统能够提高管理人员供应链管理的智能化决策水平。     

基层电力生产企业安全文化建设初探

文章阐述了基层电力生产企业建设企业安全文化的重要性,并从过程教育、责任制、措施标准化、应怠处置等方面对其进行了探讨。     

Quantal Response Equilibria for Extensive Form Games

This article investigates the use of standard econometric models for quantal choice to study equilibria of extensive form games. Players make choices based on a quantal-choice model and assume other players do so as well. We define an agent quantal response equilibrium (AQRE), which applies QRE to the agent normal form of an extensive form game and imposes a statistical version of sequential rationality. We also define a parametric specification, called logit-AQRE, in which quantal-choice probabilities are given by logit response functions. AQRE makes predictions that contradict the invariance principle in systematic ways. We show that these predictions match up with some experimental findings by Schotter et al. (1994) about the play of games that differ only with respect to inessential transformations of the extensive form. The logit-AQRE also implies a unique selection from the set of sequential equilibria in generic extensive form games. We examine data from signaling game experiments by Banks et al. (1994) and Brandts and Holt (1993). We find that the logit-AQRE selection applied to these games succeeds in predicting patterns of behavior observed in these experiments, even when our prediction conflicts with more standard equilibrium refinements, such as the intuitive criterion. We also reexamine data from the McKelvey and Palfrey (1992) centipede experiment and find that the AQRE model can account for behavior that had previously been explained in terms of altruistic behavior. This revised version was published online in August 2006 with corrections to the Cover Date.     

Using Electronic Response Systems in Economics Classes

College instructors and students participated in a pilot project at the University of Akron to enhance student learning through the use of a common teaching pedagogy, peer instruction. The teaching pedagogy was supported by the use of technology, an electronic personal response system, which recorded student responses. The authors report their experiences in using this technology-enhanced teaching pedagogy and provide another example of an active and collaborative learning tool that instructors can use to move beyond “chalk and talk.” Preliminary survey results from students participating in this pilot project are also reported.     

Uncertainty,Control, and Karl Polanyi’s Protective Response

Post-Keynesian institutionalist economists like Wallace Peterson and John Kenneth Galbraith recognized that the impact of uncertainty on economic wellbeing depends in part on the degree of control people have over the sources and consequences of it. Given the inability of government and other large institutions to reduce uncertainty or to provide citizens with the ability to manage it, mediating structures are considered as an alternative means of promoting economic security. The article concludes by describing and evaluating several of these alternatives.     

A learning-based model of repeated games with incomplete information

This paper tests a learning-based model of strategic teaching in repeated games with incomplete information. The repeated game has a long-run player whose type is unknown to a group of short-run players. The proposed model assumes a fraction of ‘short-run’ players follow a one-parameter learning model (self-tuning EWA). In addition, some ‘long-run’ players are myopic while others are sophisticated and rationally anticipate how short-run players adjust their actions over time and “teach” the short-run players to maximize their long-run payoffs. All players optimize noisily. The proposed model nests an agent-based quantal-response equilibrium (AQRE) and the standard equilibrium models as special cases. Using data from 28 experimental sessions of trust and entry repeated games, including 8 previously unpublished sessions, the model fits substantially better than chance and much better than standard equilibrium models. Estimates show that most of the long-run players are sophisticated, and short-run players become more sophisticated with experience.