建筑物整体平移新技术施工中的质量管理和工期管理

新技术建筑工程往往没有相应的设计和施工技术规范，在施工中如何进行质量管理和工期管理是一个崭新的课题。本结合建筑物整体平移工程施工中的管理经验，简单讨论了新技术建筑工程施工的特点和质量管理和工期管理。     

Time diversification and security preferences: A stochastic dominance analysis

We use stochastic dominance to test whether investor should prefer riskier securities as the investment horizon lengthens. Return distributions for stocks, bonds, and U.S. Treasury bills are generated for holding periods of one to 25 years by simulation. For each holding period, stochastic dominance tests are run to establish preferences between the alternative security classes. Contrary to previous mean-variance based studies, we find no evidence that high-risk securities (stocks) dominate low-risk securities (bonds, Treasury bills) as the investment horizon lengthens. However, we do find that corporate bonds systematically dominate government bonds.     

Working Less and Bargain Hunting More: Macroimplications of Sales during Japan's Lost Decades

Standard New Keynesian models have often neglected temporary sales. In this study, we ask whether this treatment is appropriate. We use Japanese scanner data covering the last two decades and find a negative correlation between the frequency of sales and hours worked. We then construct a model that takes households' decisions regarding their allocation of time for work, leisure, and bargain hunting into account. We show that the decline in hours worked explains the rise in the frequency of sales. The real effect of monetary policy shocks weakens by around 40% due to temporary sales, but monetary policy still matters.     

An Analysis of Trade Patterns and the Effects of the Real Exchange Rate Movements in East Asia

This article investigates the patterns of vertical specialization in trade among China, Japan and Korea, and the effects of real exchange rate fluctuations under a multistage production process. By extending the models of Yi (2003, 2010), we derive two distinct features of vertical specialization and test them using Time-Varying Parameter (TVP) VAR. We find that a positive shock to China’s final good consumption increases the intermediate goods trade between Korea and China, with expanding magnitude over time. In addition, the positive effect of a real exchange rate depreciation on intermediate goods trade is strengthened through the competitiveness-enhancing channel, with this effect being more pronouncing in Korea-China trade than in Korea-Japan trade.     

Dynamic Currency Linkages and Their Determinants: An Empirical Study for East Asian Economic Community Region

In this article, Copula GARCH models have been employed to study the inter-temporal process of currency market co-movements between ASEAN+6 countries (referred to in this study as East Asian Economic Community) and ASEAN+6 currency market index. Empirical results show that the sample countries of the region exhibit varying levels of currency co-movements with the Asian benchmark. Markov regime switching results show that many of the countries which had high dependences with the regional currency index as was found in copula estimations had also overlapping currency market cycles. Using Principal Component Analysis, we find that three statistical factors explain exchange rate co-movements which came out to be trade linkages, economic risk, and currency market openness in our dynamic panel data estimation.     

基于时间与作业成本的物流成本核算模型与方法

在物流作业成本法的基础上,加进了基于物流时间的物流成本核算方法,构建了物流成本核算的T-A模型。试图通过基于时间与作业相结合的物流成本核算模型与方法,对企业物流成本进行管理,以进一步挖掘物流隐性成本,为企业降低成本提高利润提供新的途径和思路。     

从个人决策向决策科学化转型——中国民营企业实现可持续发展必须跨越的台阶

21世纪是以数字技术、基因技术为基础,以信息革命和生物革命为标志的新经济时代。与时俱进,实现技术、产品、管理、组织、文化的创新,特别是重大决策的科学化,是企业获得持续发展的关键所在。不少中国民营企业至今对此认识不足,而迷信个人作用,搞个人决策,这正是造成其短命的重要原因之一。深入分析中国民营企业决策个人化的危害和根源,有利于实现从个人决策向决策科学化的转型。     

社会必要劳动时间的转化形式

价值决定中的生产条件实质上不过是社会必要劳动时间的转化形式。作为必要的劳动时间规定的转化形式,生产条件一方面以社会标准形式重新确认它自身包含的过去劳动的社会必要性;另一方面,它依社会必要水平重新规定应归入总量的过去劳动的必要量,从而影响社会必要劳动时间的总体确定。作为过去劳动必要性质的再现,生产条件在它自身的移位中获得了社会标准确定,它是社会必要劳动时间的两个层次有机联系的纽带,这种联系赋予两个层次的社会必要劳动时间以统一的规定和总体确定的形式,商品价值量就是由这种总体确定社会必要劳动时间决定的。     

黄河流域城市群综合承载力评价及时空分异演进

选取2008—2018年黄河流域七大城市群的面板数据,通过熵权法、Moran系数、核密度估计建立城市群综合承载力评价指标体系,并从时间和空间的维度对黄河流域城市群的综合承载力状况进行时空分异演进分析。研究结论如下:黄河流域城市群综合承载力呈现显著空间自相关,城市之间承载力发展不均衡,黄河流域城市群综合承载力现出向中高水平的路径依赖发展趋势。研究认为,提升黄河流域城市群的综合承载力应积极探索富有地域特色的发展战略,以中心城市为核心加强城市群内各城市协同发展,创新机制促进高质量发展。