Security Investment in Contagious Networks

Security of the systems is normally interdependent in such a way that security risks of one part affect other parts and threats spread through the vulnerable links in the network. So, the risks of the systems can be mitigated through investments in the security of interconnecting links. This article takes an innovative look at the problem of security investment of nodes on their vulnerable links in a given contagious network as a game‐theoretic model that can be applied to a variety of applications including information systems. In the proposed game model, each node computes its corresponding risk based on the value of its assets, vulnerabilities, and threats to determine the optimum level of security investments on its external links respecting its limited budget. Furthermore, direct and indirect nonlinear influences of a node's security investment on the risks of other nodes are considered. The existence and uniqueness of the game's Nash equilibrium in the proposed game are also proved. Further analysis of the model in a practical case revealed that taking advantage of the investment effects of other players, perfectly rational players (i.e., those who use the utility function of the proposed game model) make more cost‐effective decisions than selfish nonrational or semirational players.     

重大公共卫生事件中应如何作为:来自医学人类学哈佛学派的启示

聚焦人类学者在针对重大公共卫生事件的跨学科研究中应该有何作为这一议题,通过借鉴来自医学人类学哈佛学派的民族志洞见和研究经验,为当下2019新型冠状病毒疫情危机中所进行的田野观察和分析,以期获得灵感和启示,并探索有可行性和操作性的研究策略和方法。     

试论投资基金的治理结构

投资基金的治理结构包含三个层次,即基金的各方当事人权利义务的制度安排、基金内部约束机制、外部市场压力及监管制度。针对我国基金治理结构目前存在的问题,可通过引入独立董事制度、将基金经理的报酬机制与公司的经营业绩挂钩、增强外部市场的竞争压力等途径,使之逐步完善。     

Changing Frameworks in Attitudes Toward Abortion

For more than two decades, legal abortion has been the subject of heated political debate and adversarial social movement activity; however, national polls have shown little change in aggregate levels of support for abortion. This analysis examines how the determinants of abortion attitudes have changed between 1977 and 1996, using data from the General Social Surveys. While in early time periods, whites were more approving of abortion than blacks, that pattern had reversed by the late 1980s. After controlling for other factors, older people are more accepting of abortion throughout the two decades, while gender is generally unrelated to abortion views. Catholic religion weakens slightly as a predictor of abortion attitudes, while religious fundamentalism and political liberalism increase in explanatory power. The associations between attitudinal correlates and abortion approval also change over this time period. Religiosity becomes a less powerful predictor of abortion attitudes, while respondents' attitude toward sexual freedom and belief in the sanctity of human life increase in their predictive power. Support for gender inequality remains a weak but stable predictor of abortion attitudes. This pattern of results suggests that the public is influenced more by the pro-life framework of viewing abortion than by the pro-choice perspective.     

试论佛山企业境外投资

企业境外投资应该成为佛山市发展外向型经济的战略任务之一。佛山市企业境外投资,具备着所有权、内部化和区位等方面的相对优势。境外投资是佛山市企业占领国外市场、扩大出口的有力手段;可享受国内外双重的优惠政策和待遇;是增加外汇收入、利用外资的新型方式。九十年代,佛山市企业应注重对东南亚国家的直接投资,对国外高科技,新产品、新服务部门和行业的直接投资。     

关于规范地方财政投融资体系的若干思考

地方财政投融资是以地方政府信用为基础 ,为实现政府基本目标 ,采取有偿融资和投资方式所进行的经济活动及所形成的制度体系。改革开放以来 ,投融资业务对地方经济发展起到了积极作用 ,但由于理论研究的严重滞后 ,以及政策措施不配套 ,地方财政投融资尚处于初步发展阶段 ,我们有必要总结其在发展中面临的问题 ,促进地方财政投融资体系的进一步完善     

论新闻报道策划的实践意义

新闻报道策划 在近几年的新闻实践中应用非常广泛。就报道主题、整合信息、沟通受众和发挥媒体整体优 势等方面论述了新闻报道策划的实践意义。     

试论近中国茶馆的社会功能

在近代中国 ,茶馆与民众生活紧密相连 ,并承担着广泛而又复杂的社会功能。茶馆与民众的经济生活相关联 ,也是民间纠纷调解的重要场所。同时 ,作为一个公众活动的场所 ,茶馆也是民间社会信息传播的集散地 ;民众在茶馆中表达自己的见解 ,也使得茶馆成为一种控制舆论的力量。茶馆的这些功能是近代民间社会内在运作逻辑的体现。     

人力资本投资与个人收入能力

讨论了人力资本的经济价值，通过建立教育投资模型，训练投资模型及流动投资模型，指出了正规教育投资，在职培训投资，迁移与流动投资对人力资本收入能力的影响。经分析表明，个人的人力资本现时存量与个人的未来收入能力之间存在正相关。     

试析我国房地产投资运作模式及其发展

随着我国房地产市场由卖方市场逐渐过渡到买方市场,房地产投资运作模式由作坊生产式投资模式逐渐向社会化大生产式投资模式椎进。