Who Should Pay for Interdependent Risk? Policy Implications for Security Interdependence Among Airports

We study interdependent risks in security, and shed light on the economic and policy implications of increasing security interdependence in presence of reactive attackers. We investigate the impact of potential public policy arrangements on the security of a group of interdependent organizations, namely, airports. Focusing on security expenditures and costs to society, as assessed by a social planner, to individual airports and to attackers, we first develop a game-theoretic framework, and derive explicit Nash equilibrium and socially optimal solutions in the airports network. We then conduct numerical experiments mirroring real-world cyber scenarios, to assess how a change in interdependence impact the airports' security expenditures, the overall expected costs to society, and the fairness of security financing. Our study provides insights on the economic and policy implications for the United States, Europe, and Asia.     

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.     

湖北省乡镇企业1978—2002年发展概况、问题及对策研究

1978～2002年,湖北省乡镇企业在企业单位数量、对经济增长贡献及转移农村剩余劳动力等方面对该省经济产生了重要的推动作用。然而,随着市场经济体制的深入发展和不断完善,乡镇企业发展也遇到了前所未有的困难。本文在深入分析当前乡镇企业所面临的问题基础上,提出了乡镇企业未来发展的战略对策。     

Urban cultivation in Accra: an examination of the nature, practices, problems, potentials and urban planning implications

The literature on urban farming in Sub-Saharan African cities reveals that most studies have been conducted in Eastern, Southern and Central African cities. A few have focused on West Africa, including Sierra Leone, Guinea Bissau, and Cameroon. In Ghana there is a paucity of information on urban farming. The purpose of this paper is to examine the status of urban cultivation in Accra, Ghana's capital, reviewing existing research, and to present new empirical findings on urban cultivation emphasizing on its history, nature, practices, problems, potentials and urban planning implications.     

新疆与中亚跨国民族问题对我国安全的影响

近年来,随着中亚国家的独立,以及由此而引发的各民族政治、经济生活地位的起伏和民族关系的变化,使新疆与中亚跨国民族问题表现得异常突出,其表现形式主要有三:一是民族意识增长;二是以哈萨克族为主的跨国民族向境外移民问题;三是民族分立主义倾向.它对我国的军事安全、政治安全和文化安全构成了程度不同的威胁.     

以城市为主导统筹城乡、区域和谐发展

长期以来,我国的区域经济实际上是农村主导型的发展模式。现在,这种发展模式已经走到了尽头,必然要向城市主导型区域经济发展模式的转变。这就要求区域经济发展应以城市为重点,推进城市化战略,统筹城乡发展,在此基础上构筑城市经济圈,统筹区域发展。城市经济圈的形成应打破行政界限,顺其自然地构建城市经济圈,因市制宜地探索城市经济圈的发展道路,逐步提升城市经济发展水平,以城市为主导统筹区域经济协调发展。     

20世纪六七十年代泰国经济开发中的民族矛盾

2 0世纪六七十年代 ,随着经济开发活动的展开 ,泰国的民族矛盾也呈激化趋势。之所以如此 ,原因在于政府在对少数民族地区的经济开发过程中实行了一些不妥甚至是错误的政策和措施。文章对此进行了深入探讨     

沈阳市农户储备行为实证分析

以沈阳市农户统计数据为基础,根据影响农户储蓄行为的因素,建立了沈阳市农户储蓄行为的计量模型;并对现今农村金融体制与社会制度变迁过程中存在的问题进行分析,提出相应的政策建议。     

我国消费需求不足的深层次原因及政策取向

收入决定消费。20世纪90年代中期以后我国消费需求不足的根本原因在于长期以来居民收入增长速度低于GDP增长速度。低收入和高增长构成我国经济运行的典型特征。因此,应努力改变过去那种粗放型经济增长方式,并把提高居民收入作为拉动内需的一项长期发展战略。     

恩施州经济社会发展战略回顾与构想

区域经济社会发展战略,是国家整个宏观经济社会发展战略的重要组成部分。随着时代的变迁,恩施州在不同的历史时代制定了不同的经济社会发展战略。在今天的西部大开发中,恩施州应该坚持“举西部旗、打民族牌、唱特色戏、建生态州”四位一体的经济社会发展战略重点,这是根据国家宏观经济社会发展战略的恩施州的宏观实际所作出的必然的战略选择。