On the equivalence between the overlapping-generations model and cyclical general-equilibrium models

We show that equilibrium cycles in an overlapping-generations model are equivalent to asymmetric equilibria in a general-equilibrium model. We use this equivalence to find equilibrium cycles in the overlapping-generations model with two and three generations, respectively. For the example with two generations we show that for certain parameter values cycles of all periods occur.     

供应商战略性细分管理研究

供应商对企业经营绩效具有重要作用。供应商管理历来是企业管理的重要组成部分。目前,结合企业实践对供应商管理的研究比较少。借鉴营销管理中的市场细分理论,本文提出从战略角度对供应商进行细分,并针对不同的细分供应商,应用不同的管理方式进行管理,以达到企业绩效最优。     

斜拉-刚构组合体系桥零号块空间应力分析

以河谷汉江公路大桥斜拉桥主桥部分作为依托工程,针对其零号块空间受力问题,采用有限元软件midas FEA建立零号块有限元模型并进行相应分析.以施工过程中成桥运营阶段最大弯矩工况、最大剪力工况以及施工阶段最大双悬臂工况为控制计算工况,分析3种工况下零号块最不利内力情况.研究表明,在现有的设计条件下,结构受力可满足规范要求,相应的设计细节可为类似的工程提供借鉴.     

Optimal public policy with endogenous mortality

We analyze the welfare‐maximizing policy mix between explicit and implicit taxation, where the probability of survival of the young agents depends upon the share of government expenditure on health, education and infrastructure. We show that increases in the survival probability lead to an increase in the reliance on seigniorage as a welfare maximizing outcome. However, the seigniorage tax base must be large enough for the benevolent planner to use the inflation tax.     

太行山南段主要隆升时期探讨

本文以太行山南段为研究区域,通过对夷平面的研究,认为太行期夷平面形成之后至唐县期夷平面形成之前太行山南段隆升约1300m,占整个山体隆升幅度的70%。河流阶地的研究表明太行山南段第四纪以来的隆升幅度约80m,对太行山南段隆升成山的贡献不大。同时,山前坳陷盆地古近系-新近系与第四系之间存在巨大的地层厚度差,以及山前断裂在古近纪和新近纪时期活动频繁,第四纪时期活动性弱。以上证据表明太行山南段主要隆升于太行期夷平面形成之后至唐县期夷平面形成之前,即中新世至上新世中期,第四纪隆升幅度较小。     

Shouldice疝修补258例临床体会

目的:总结Shouldice疝修补临床应用经验。方法:回顾性分析1996年至2009年12月应用Shouldice疝修补腹股沟疝258例患者的临床资料。结果:术后随访3个月至5年,患者治愈253例,复发5例,一次性治愈率98.6%。结论:Shouldice疝修补术更符合腹股沟区的生理解剖结构,具有适应症广,治疗费用低廉,痛苦轻,后遗症少复发率低的优点。     

Quasi-longitudinal Designs in SEM state Space Modeling

The collection of longitudinal data over the full model time scope is often an appropriate way to estimate the dynamic state space model with time-varying parameters. Nevertheless, in many situations it is possible and preferable to collect and combine data from independent groups of subjects, each covering a shorter interval than the full dynamic model. Several quasi-longitudinal designs are discussed: overlapping designs (overlapping cohort design OCD and overlapping samples design OSD) as well as nonoverlapping designs up to the exclusively cross-sectional design. The use of the structural equation modeling (SEM) program Mx and continuous time state space modeling is recommended. Finally, a number of the quasi-longitudinal designs is empirically evaluated, comparing the results with those of the full-longitudinal design.     

Tax evasion,social norms,and economic growth

We propose a theoretical model to account for the negative relationship between tax evasion and economic development. More precisely, we integrate tax morale into a dynamic OLG model of tax evasion. Tax morale is modeled as a social norm for tax compliance. We show that accounting for such nonpecuniary costs of evasion may explain (a) why the share of evaded taxes over GDP decreases when countries grow and (b) that tax morale is positively correlated with the level of GDP per capita. Finally, a higher tax rate increases aggregate evasion and the number of evaders when taxpayers decisions are interdependent.     

Intergenerational Altruism and the Environment

We construct an overlapping generations model of pollution externality in which individuals are altruistically linked to their offspring as in Barro (1974). It is shown that steady-state consumption may be a decreasing function of the intergenerational degree of altruism. Despite individuals' altruism, the competitive equilibrium is not optimal. We thus study the social optimum and show that it can be decentralized.
JEL classification: D 62; D 64; D 91     

"三言二拍"中士、商互渗现象解读

"三言二拍"这部作品,在中国古代文学史上首次以大量的篇幅肯定了商人的经商活动,从多个层面展现了士与商,塑造了中国文学史上具有新特点的士人形象和商人形象,打破了古代文学在对士、商形象塑造上"脸谱化"的做法,给人耳目一新的感觉.无论是小说中所宣扬的崭新的价值观念,还是在新时期对商人形象的重塑,都实现了对传统文本的超越,具有鲜明的时代特征.