粮食安全的耕地保障分析

粮食问题是一个关系到国民民生的重要战略问题,特别是我国人口多耕地少,能否解决粮食基本自给直接影响我国的改革与发展以及社会稳定.正如江泽民总书记1995年在中央农村工作会议上强调的"我们这样一个拥有几亿人口的大国,粮食必须立足于自给,供求必须基本平衡."     

关于上海新一轮改革的若干思考

当前是上海加快推进“四个率先”、加快建设“四个中心”和社会主义现代化国际大都市的关键时期,国内外发展的新形势对改革的重点、方式、任务、动力以及实施路径提出了新的要求,上海必须根据当前改革发展的阶段特征,按照顶层设计的改革推进思路,着力围绕转型发展的目标要求,重点在民生改善、服务经济、内外开放、政府改革和改革机制完善等方面实现关键性突破,以带动上海改革的整体推进和持续深化。     

开封新区开发与古城空间互动关系研究

本文选取古城开封为实例,分析了当前新形势下古城开封空间发展的机遇与挑战。借助古城汴西新区的开发为契机,探索新区与古城合理的空间互动模式。同时通过对城市发展历程的研究,提炼出新区与古城互动要素并对其特征进行了分析。最后提出实现汴西新区开发与古城空间发展互动关系的策略,探索新区与古城合理的空间互动模式,从而积极地调整和优化规划思想,为城市规划和管理提供更广泛和完善的选择。     

建立国家综合配套改革试验区的理论基础与基本条件探索

一、引言 继上海浦东新区、天津滨海新区被国务院批准为国家综合配套改革试验区之后,2007年6月7日,国家发改委下发《国家发展改革委关于批准重庆市和成都市设立全国统筹城乡综合配套改革试验区的通知》,正式批准重庆市和成都市建立全国统筹城乡综合配套改革试验区.     

转型期中国西部城市定位选择——遵义市红花岗区“十三五”城市发展定位选择案例分析

中国中小城市存在城市定位特色缺失及个性不强的问题。通过对遵义市红花岗区城市定位选择的案例研究发现,政治因素、资源禀赋、区域文化、竞争环境、发展趋势影响城市的定位选择。西部小城市定位不准的主要原因是财政困难、产业缺乏、城市化率低、传统城市经营方式不可持续。发展经济、解决财政问题是城市政府的首要选择,城市经济发展考核指标及城市政府的现实需求对城市定位选择具有直接影响。现有城市定位理论对中国西部中小城市的定位指导有局限性。     

从群体遗传的DNA线索看东乡族族源问题

DNA分析技术的发展为进行民族识别和分析民族起源、迁徙、流动、融合提供了新手段。本文在国内外首次应用D13S317基因座第 11号等位基因频率指标 ,计算了东乡族群体遗传动态数据。结果发现 ,东乡族和回族遗传距离很近 ,且东乡族中具有白种人血缘混杂。结合其他有关资料 ,我们认为东乡族的起源与元代蒙古军带来的中亚工匠、签军有关 ,亦与当地蒙古族、回族、藏族人群的融合有关。本文的研究结果可以为民族研究提供群体遗传方面的线索     

民族教育研究方法论学术研讨会简述

2008年10月20日,由教育部人文社会科学重点研究基地西南大学西南民族教育与心理研究中心和西北师范大学西北少数民族教育发展研究中心共同举办的民族教育研究方法论学术研讨会在重庆市西南大学召开。来自西南大学、西北师范大学、四川师范大学、重庆大学、西南政法大学、《民族研究》编辑部等单位的30多名代表参加了本次研讨会。在上午的开幕式     

Entrenchment in publicly traded family firms: Evidence from the S&P 500

Family involvement in corporate governance through ownership, management, and board membership presents a unique dilemma for understanding the strategic impetus and costs of entrenchment decisions. The presence of shared family ties and the family-centered goals of firm principals call to question the applicability of extant agency arguments regarding the nature and antecedents of managerial entrenchment. Exploring this, we develop and test a model of family firm-specific determinants (i.e., family ownership and family's involvement in management and governance) of entrenchment in publicly traded firms by drawing upon principal-principal agency theory. Findings of the empirical analysis of family owned S&P 500 firms suggest family firms are motivated to entrench managers when doing so supports the pursuit of family-centric goals. However, the extent to which entrenchment supports such goals varies at different levels of family ownership.     

The Role of Internal and External Complexity in Global Factory Performance: An NKC Application

The global factory literature suggests that MNCs can take advantage of global operations by extensively offshoring and outsourcing activities. However, the added difficulty for the lead firm to coordinate the resulting complex structure is often underestimated. Evidence could be found in Boeing's 787 Dreamliner project, in which the external complexity disrupted MNC performance. Motivated by the gap between theory and practice, this study focuses on systems of MNCs connected with each other with supplier-client relationships and/or outsourcing. In particular it investigates the interplay of the internal and external complexity in such systems and how their balance affects the system performance. The study models the internal and external complexity by using the NKC-simulation methodology and adjusting it to the specific MNC context. The NKC methodology is widely used in organization theory to study complex systems. Simulations comparing the performance of MNCs that use outsourcing to different degrees indicate that a balanced level of internal and external complexity is beneficial in the context of global factory.     

Co-Occurring Psychosocial Problems and Multiple Sexual Partners among Men Who Have Sex with Men in Shanghai,China: A Syndemic Approach

We aimed to apply syndemic theory to verify the association and reinforcing effects between psychosocial problems and multiple sexual partners (MSP) of men who have sex with men (MSM) in Shanghai, China. A cross-sectional study was conducted among 547 MSM in Shanghai, China using a face-to-face survey. Sociodemographic and psychosocial data were collected, as well as information on MSP and condomless anal sex. In the 6 months prior to the survey, 54.3% of the MSM sample had had MSP. Univariate analysis showed that self-esteem, depression, loneliness, sexual compulsivity, and involuntary subordination (IS) were associated with MSP. Sexual compulsivity (multivariate odds ratio [ORm] = 2.94, 95% CI = 1.76–4.91) and IS (ORm = 1.79, 95% CI = 1.14–2.81) remained significant in multivariate analysis. MSM with five or more psychosocial problems had greater odds of (adjusted odds ratios = 3.06, 95% CI = 1.49–6.25) having MSP in the previous 6 months than the non-syndemic group. Our findings provide preliminary confirmation of the additive relationship of syndemic psychosocial health conditions and MSP among MSM in Shanghai, China. An integrated intervention with special focus on sexual compulsivity and IS is needed.