气候的历史与历史气候研究

寨堡是我国古代重要的军事防御性聚落，其修筑的时间、空间皆与区域的战争形势有着较大关系。清代四川省由于多次大规模战乱，迫使乡民修筑了数以千计的寨堡。寨堡的命名主要可分为因自然地理条件和因人文社会因素两大类，前者包括地形、水文、土石、植物等，后者包括姓氏、寺观、神祇、嘉名、人物、神话、形象、纪事等。寨名包含了丰富的文化内涵，体现出了寨堡的选址、用材、作用、历史、精神等内容。     

Defender–Attacker Games with Asymmetric Player Utilities

The presence of strategic attackers has become an important factor in the security and protection of systems, especially since the 9/11/2001 attacks, and considerable efforts have been dedicated to its study. When defending against the strategic attacker, many existing studies assume that the attacker would seek to minimize the defender's utility, which implies that the defender and attacker have symmetric utilities. However, the attacker's objective is determined by its own valuation of the system and target of the attack, which is not necessarily consistent with the defender's utility. If the attacker unexpectedly targets a different utility, then the defense strategy might no longer be optimal. In particular, the defense strategy could be inferior if the attacker's utility is not known to the defender. This study considers a situation where the defender's utility is the system survivability and the attacker's utility is the expected number of destroyed elements in the system. We investigate possible attack strategies under these two different utilities and compare (a) the conservative defense strategy when the attack utility is unknown to the defender with (b) the optimal defense strategy when the attack utility is known to the defender. We show that the conservative protection strategy is still optimal under asymmetric utilities when the contest intensity is smaller than one.     

中国基本医疗保险的实际参保率及其分布特征:基于多源数据的分析

全民覆盖是基本医疗保险降低国民医疗费用负担的前提条件。中国基本医疗保险是否实现了全民覆盖仍存在争议。本文利用多源调查数据,分析了我国基本医疗保险实际参保率及其分布特征。不同来源的数据基本证实,2015-2016年,中国仍有超过10%的国民没有参加任何一项基本医疗保险制度。其中,城镇居民、非农户口和没有户口的居民、东北地区、年轻人、儿童、未就业人群、低收入人群、在校学生以及流动人口基本医疗保险实际参保率更低。城乡居民实行自愿参保,因管理部门分割、信息系统不统一导致的重复参保以及因财政补贴制度导致的户籍地参保等制度设计,是导致基本医疗保险未能实现全民覆盖的根源。要实现基本医疗保险全民覆盖,解决国民医疗后顾之忧,未来我国基本医疗保险应实行强制参保、以家庭为单元参保、常住地参保,建立全国统一的基本医疗保险信息系统,并鼓励发展补充性医疗保障制度。     

Effective tax rates and firm size in Ethiopia

The literature on Effective Tax Rates (ETRs) focuses on high‐ and middle‐income countries, but there is very little evidence on low‐income countries. This article addresses this gap with new evidence from Ethiopia. We investigate corporate ETRs in Ethiopia and whether the distributional effects they have in practice are in line with the corporate tax policy design. We calculate ETRs in line with the literature in this field, using profit tax at the numerator and gross profit at the denominator. We then analyse ETRs not only using panel data, focusing particularly on their relation to firm size, but also including other explanatory variables. Our main result is that, despite a proportional tax rate, small firms face a higher effective tax burden than larger firms, while middle‐sized firms face the lowest burden of all. We highlight that tax systems can have practical implications that differ largely from their policy design, due to compliance costs and imperfect enforcement. Measures to reduce compliance costs for small firms are particularly recommended.     

Ambidexterity penetration across multiple organizational levels in an aerospace and defense organization

The ambidexterity framework, which comprises two contradictory, yet interrelated processes of exploration and exploitation, has been researched using a variety of perspectives. Few studies, however, provide insight into the question: how is ambidexterity managed across multiple organizational levels? To address this question, we introduce the term ambidexterity penetration that refers to the enactment of ambidexterity across multiple organizational levels and develop a conceptual framework about how it is practiced (horizontally, vertically and organizationally). We empirically showcase this framework using findings from six business units of an aerospace and defense organization and analyzing data from 30 interviews. Overall, our study contributes to ambidexterity research and offers an empirical investigation of ambidexterity penetration across multiple organizational levels in the context of the aerospace and defense sector.     

论近代川边治理与国防安全：从赵尔丰到刘文辉

风云激荡的近代“川边”，历任主政者的川边治理成效殊异：赵尔丰籍“平康三策”，锐意进取，开拓出广阔的川边境域，成功践行“固川保藏”方略。尹昌衡藉个人英雄主义维持短暂的绚烂；其后走马灯式的镇守使无法掌控川边局势，失地溃败；颇具政治韬略的刘文辉，妥善处理民族关系，稳固川边，促使西康成功建省。34年的川边治理为现代西南边疆治理留下了鲜活的经验教训，川滇藏结合部需要新的边疆治理统筹。     

新时代高校国防教育隐性课程开发探究

新时代高校国防教育，在利用好军事理论教学这一显性课程基础上，还需要开发隐性课程。从国防教育隐性课程内涵谈起，阐述了开发国防教育隐性课程的必要性和可行性，进而对高校国防教育隐性课程开发的策略提出了几点看法，认为应该从开发以校园环境建设为基础的隐性课程、开发以制度建设为载体的隐性课程、开发以培育大学精神为核心的隐性课程三方面进行。     

中国国防建设的环境分析

在把中国国防建设的环境分为国际环境和国内环境的基础上,分别分析了中国国防建设的国内外环境的有利和不利因素,认为虽然中国的国防建设环境中存在一定的有利因素,但从整体而言,中国国防建设的环境十分严峻,并且针对此提出了自己的对策、建议。     

依命令之职务行为合法化探究——从有效、约束命令切入

依命令之职务行为的合法化前提是必须存在一定有效的、具有约束力的命令。有效、约束命令的范围为不明显违法的命令。是否明显违法,应当从命令的形式和内容两个方面进行考察。对有效、约束命令的认识错误属于对合法化事由前提条件的认识错误,应阻却故意的成立;在法律规定处罚过失犯的情况下,成立过失犯罪。     

论产品责任法中的符合强制性标准抗辩

强制性标准是生产者生产产品必须遵循的标准.符合强制性标准抗辩是指产品符合强制性标准导致伤害时,生产者可减轻或免除赔偿责任.强制性标准与侵权诉讼标准各有千秋,而中国法院对强制性标准的盲目崇拜,使其赋予符合强制性标准抗辩较高的证据效力.法院对强制性标准的尊重实质上是对立法和司法权力的尊重,但这会导致产品符合强制性标准又致害时,受害人无法获得救济.中国法院应适当降低符合强制性标准抗辩的地位,使其既能维护受害人的权益又能鼓励生产者研发新产品.