Black-white differentials in infant mortality in the south, 1940–1970

Demography - This paper examines the trends and variations in the black-white differentials in infant mortality in ten selected Southern states during the 1940–1970 period. The patterns...     

Corporate Diversification,Information Asymmetry and Insider Trading

The literature suggests that corporate diversification destroys firm value. This value destruction is usually considered to be a consequence of managers' pursuing diversification strategies to benefit themselves rather than to increase firm value. This paper provides evidence that casts doubt on this agency theory‐based explanation for corporate diversification. Evidence based on insider trading suggests that managers themselves consider their diversification strategies to be value‐increasing. Specifically, it is documented that corporate insiders (directors) purchase more of their firms' shares in the open market when corporate diversification is high. Moreover, insiders purchase more when the level of diversification discount is high, suggesting that they disagree with outside investors' undervaluation due to diversification. It is also found that the market reaction to insiders' purchases is positively related to corporate diversification. This result suggests that outsiders consider the amount of favourable information contained in insiders' purchases to increase with the extent of corporate diversification.     

参与式区域农业可持续发展探析

区域农业可持续发展受区域异质性影响,特别是由于山区千差万别的自然、社会、经济特点,以及区域目标群体的思想、认识、传统、习俗的迥异,造成山区农业发展模式的多样性和复杂性。在开展农业可持续发展项目研究时,我们必须采用自下而上参与式的工作方法,充分发挥区域源动力——农民的潜力和技能,让农民参与项目的决策、实施、监督和评估,从而寻求山区农业可持续发展多元化途径,以保证项目真正体现区域农民的意愿。     

基于产业升级理论的兰州东城区产业发展思路

兰州东城区产业发展首先应与其在兰州都市区的功能和定位一致,其次要与各区的区位条件和现状产业发展一致.在产业空间布局,特别是工业空间布局上,应运用产业集群的理论,按照劳动地域分工的特点,从产业升级角度建设同类和相关产业集聚区,努力发展产业集群区.在研究兰州市产业升级面临问题及对城市发展分析后,对兰州东城区产业发展总体思路和各产业区产业发展思路进行定性分析,提升东城区产业水平,促进产业-区域协调发展.     

香港公共文化服务模式的特点与启示

近年来,香港公共文化服务发展迅速,服务模式日趋完善,呈现出政府合理主导、社会多元参与、伙伴关系多维构建以及关注特殊群体等特点。通过对香港公共文化服务模式主要特点的梳理、分析,与内地模式进行对比并加以反思,可得出一些有益于内地公共文化服务体系建设和发展的启示,如重新理解“政府主导”,完善社会参与模式,注重统筹协调和伙伴关系构建,关注特殊群体,推进公共文化服务均等化建设等。     

Journeys to Knua: displacement,return and translocality in Timor-Leste

ABSTRACT

Return journeys to ancestral lands are a central dimension that underscores contemporary ideas of origin, identity, kinship, custom, health and prosperity for the East Timorese. The material and social reproduction of knua – both in the sense of the ancestral territory and associated kin-based ritual community – is heavily reliant on ongoing place-based and translocal customary reciprocal exchanges. Based on multi-sited fieldwork, this article examines the return journeys to Lesuai, an ancestral settlement in the remote central southern highlands of Timor-Leste, which was abandoned during the Indonesian invasion and restored in the later years of occupation. Lesuai community believes the spirit realm exerts an overwhelming influence over their general well-being, compelling ‘house’ members to renew their connection with knua to maintain family ties and benefit from ancestral protection. Closer ethnographic attention reveals how the motivations, experiences and understandings of ‘return’ to origin places are highly personal, gendered and generational. Broadly, these return mobilities demonstrate the agency, adaptability and resilience of conflict-affected populations. Through prolonged displacement and resettlement, dispersed knua members have created new livelihoods, subjectivities and attachments across multiple places, which are reconfiguring family ties, connections to ancestral places, and how ritual obligations are fulfilled.     

禁止著作权滥用的法律基础和司法适用——以《庆余年》超前点播事件引入

进入《民法典》时代,禁止权利滥用原则在著作权领域的适用引发了许多问题。禁止著作权滥用与著作权基础理论相契合,并具备宪法、民法基础,是我国履行“TRIPs协议”的必然选择,在著作权滥用的法律适用中,应充分考量著作权滥用的特殊性,以类型化视角分别确定判断标准。公法规制的权利滥用,已与反垄断法结合,形成了体系化的判断标准。私...     

基于多智能体的城市群政府合作建模与仿真——嵌入并反馈于一个异构性社会网络

以社会网络视阈下的城市群政府合作过程中的多期进化博弈为例,通过概念模型、数学模型和计算机模型的完整建模过程,在微观主体互动层面建立一个考虑个体成本收益差异的非对称进化博弈系统(并同时考虑全体博弈互动和部分博弈互动的交互),在宏观社会结构层面建立一个实现节点之间连接概率定制化的异构性社会网络模型(且同时考虑全局信息交互和局部信息交互的更替),并通过多智能体系统(特别是交互意愿变量的引入)实现了微观互动(博弈行为)和宏观涌现(网络结构)之间的双向反馈和动态交互.在构建模拟系统的基础上,设计并运行了一系列的实验方案,对仿真模型及模拟结果进行信度检验,并结合多次模拟实验样本数据的统计分析,考察全局交互比例,局部连接概率等网络结构变量、合作收益、惩罚措施等博弈参数变量、以及决策个性等主体属性变量对城市群政府博弈形势与合作水平的动态影响,为促进城市群政府合作和区域一体化进程提供决策依据和政策参考,也是政治学与公共行政学科计算实验研究的一次创新尝试.     

同质时鲜产品捆绑销售的最优策略

由于时鲜产品具有十分显著的时效性,为了更快地将时鲜产品销售出去,很多零售商采用了捆绑销售的方式.研究了同质时鲜产品捆绑销售的最优策略问题,对同质时鲜产品捆绑销售的最优价格、最优临界时间以及最优数量决策问题进行了描述,并利用随机效用理论建立了MNL模型.获得了同质时鲜产品捆绑销售单变量决策的最优价格、最优临界时间和最优数量,以及相应的最大利润.进而研究了同质时鲜产品捆绑销售的双变量组合决策问题,并给出了最优双变量组合决策和条件.最后,给出了一个算例,并分析了捆绑销售中价格、数量与时间之间的关系.