A credibility-based multi-objective temporary logistics hub location-allocation model for relief supply and distribution under uncertainty

Disaster response operations revolve around uncertainties. While uncertainties arising due to randomness can be avoided for post-disaster location problem, those arising because of impreciseness may persist long after the disaster's occurrence. Despite the uncertainties and lack of sufficient information about the extent of the damage, disaster response facilities must be established quickly after the occurrence of the disaster. Moreover, the decisions of whether to open, where to locate, and when to open disaster response facilities are based on the amount and quality of information available during the decision-making period. To address these issues, we develop a multi-objective location-allocation model for relief supply and distribution that accounts for the imprecise and time-varying nature of different parameters and time-varying coverage, while also accommodating the subjective attributes necessary to enable establishment and operation of the temporary logistics hubs (TLHs). A credibility-based fuzzy chance-constrained programming model is employed to account for the impreciseness inherent in predicting parameter values during disaster response. The results show where, when, and how many TLHs to open and how to allocate relief supplies. Meanwhile, the sensitivity analysis provides a broader understanding of the impact of limiting the number of TLHs as well as the confidence level and the spread of the symmetric triangular fuzzy numbers on the attainment of the model objectives.     

税收结构、政府支出与经济增长

本文构建包含税收结构和政府支出的内生增长理论模型,运用我国1998-2017年31个省市自治区数据,通过固定效用面板数据模型,研究税收结构与在预算平衡下政府支出对长期经济增长影响,并详细分析了东中西部地区间的差异。主要结论有:1.将增值税纳入理论模型之中,研究发现,税收对长期经济增长没有影响,政府支出用于提供公共技术品时会有长期增长效应。2.在满足预算约束平衡时,虽然税收对长期经济增长没有影响,但税制结构具有配置效应。3.不同税种对东中西三个区域具有差异性,需要通过制定合理的税制结构政策来促进区域的经济发展。     

Personality traits discriminating between employees in public- and in private-sector organizations

Based on data collected from public and private organizations in Greece, this paper examines the differences in individual traits between public and private-sector employees, differences which eventually influence employees' attitudes and behaviours towards their organizations and their consequent performance, specifically in organizational commitment and neglect behaviour. The findings indicate that there are some differences between the two groups of employees. In only three out of ten personality characteristics examined here (security needs, pay needs and Protestant work ethic), are there no distinctions between the groups. These findings imply that, besides the environmental and structural characteristics of the two sectors which may be the source of attitudinal differences, it might also be that persons attracted to the public sector have different personality characteristics from those attracted to the private sector. Regardless of the source of differences, results point to the need for changing recruitment and selection practices in public organizations as well as for implementing a number of human resource management practices, the lack of which seems to drive junior qualified staff away from the public sector where they are mostly needed. The later seems to be the case in Greece where the lower pay and the non-competitive, non-challenging atmosphere prevailing in most public-sector organizations seem to play an important role in driving most dynamic employees away from the public sector.     

Cross-cultural differences in upward ratings in a multinational company

Differences between countries in the favourability of upward ratings were examined in a multinational corporation. Data were collected from 6,400 subordinates in ten countries. The results showed that the US and European countries were higher than Brazil and Asian countries on a number of items. A discriminant analysis revealed sets of items that maximally discriminated between groups of countries. The results were interpreted post hoc based on Hofstede's (1984) study of country differences in cultural values. Some results indicated changes in values since Hofstede's data were collected twenty years ago, while others indicated that values in some countries have not changed. The results have implications for calibrating upward feedback and evaluating the need for, and likely effectiveness of, interventions to guide how an organization is managed.     

Perception of gene technology,and food risks: results of a survey in Switzerland

Perceptions of and attitudes toward genetically engineered food and other food hazards were examined through data from telephone interviews conducted in Switzerland. A random quota sample was used ( N v = v 1001). General attitudes toward technology and political beliefs significantly influenced perceptions of gene technology. Women were more concerned about gene technology and food risks than men were. The term 'gene technology' evoked neutral or negative associations in most people; few people held positive images regarding this technology. Perception and acceptance of gene technology varied according to the type of application; people were less concerned about convenience or processed food. Although it is mandatory to label genetically modified food in Switzerland, relatively few people were familiar with this label. Participants assessed various food risks, and principal components analysis indicated that they distinguished between technological and natural food risks. Implications of these results are discussed.     

所得税会计准则比较分析

本文对《企业会计准则第18号—所得税》与企业之前适用的旧准则进行对比分析,回顾我国所得税会计的历史沿革,从所得税会计差异的分类、所得税会计的核算方法、财务报表列报与披露等方面进行了比较分析,认为新准则实施能够最大限度地满足外部财务信息使用者对财务报表的需求,同时使企业能够更好地适应现代社会日益激烈的商业竞争环境。     

承接产业示范区能够推动经济发展吗？ ——基于双重差分方法的验证

基于全国295个城市2000-2014年的面板数据,利用双重差分法（Difference in Differences Estimation）验证了国家级承接产业示范区对地区经济增长的影响。研究表明,国家级承接产业示范区的设立能够显著推动地区生产总值和地区人均生产总值增长,严格稳健性检验下的结论仍然成立;进一步分析发现,国家级承接产业示范区对经济增长的影响符合“边际效应递减”规律,对经济发展相对较好、禀赋较优地区的推动作用要小于经济基础薄弱、无明显禀赋优势地区。这一结论为规模推广国家级承接产业示范区战略,更好平衡区域发展、把握将来产业转移大潮提供了借鉴意义。     

健康不平等视角下医疗服务可及性对老年健康的影响* ——基于CLHLS数据的实证分析

随着我国人口预期寿命的延长和人口老龄化进程的加剧,如何促进老年健康成为学术界及政策制定者亟需关注的重要议题。基于2005年、2008年、2011年及2014年"中国老年健康影响因素跟踪调查"(CLHLS)数据,以健康不平等理论为研究视角,探讨医疗服务可及性对老年健康的影响。研究结果表明,医疗服务可及性与老年健康之间呈显著相关,医疗服务不可及会显著增加老年人IADL、ADL及认知功能障碍和死亡风险;且这种关系随性别、年龄及城乡呈现出差异性。具体表现为医疗服务可及性对女性老人健康结果的影响大于男性老人;对低龄和中龄女性老人与中高龄男性老人的影响大于同性别的其他年龄组;与城镇老人相比,医疗服务可及性对农村老人健康结果的影响更大。医疗服务可及性对老年健康影响的性别、年龄及城乡差异,与其在整个生命周期中所遭遇的不公平制度环境有关。研究的政策意义在于,在我国人口快速老龄化的背景下,如何通过提升医疗保障制度在不同性别、年龄以及城乡之间的公平性来提高老年人医疗服务可及性,消弭由于制度不公平而带来的健康不平等,从而降低老年人IADL、ADL及认知障碍的发生率及死亡风险,实现老年群体的健康老龄化。     

延边州城镇化空间结构差异研究

运用主成分—聚类分析和探索性空间数据分析(ESDA)方法,在ArcGIS和Geoda095i等软件平台上,对延边州的城市化水平及空间差异进行了定量分析。结果表明:单从非农业人口比重来看,延边州城市化水平较高,但城市化发展水平不均衡,空间差异较大;城市化综合因子的Moran’s I指数为-0.255呈现负的空间分散现象;8个县市之间的城市化空间差异也较大,存在"极化"等现象。针对结论提出相应的建议,期望能够为延边州城市化综合发展提供理论依据。     

Temporary financial equilibrium

Summary. In a two-period pure exchange economy with financial assets, a temporary financial equilibrium is an equilibrium of the current spot and security markets given forecast functions of future prices and payoffs. The temporary equilibrium model can then be interpreted as an Arrow-Debreu economy where preferences depend on prices. This identification implies, among other consequences, the existence and the generic determinateness of the financial temporary equilibria associated with given forecast functions. Received: December 29, 1999; revised version: December 20, 2001