倒边盖挖逆作法基坑支护结构可靠性分析

为了解决采用标准Monte Carlo法计算复杂基坑工程上常见小概率失效,导致计算效率低的问题,以南京市湖南路地下商业街工程为工程背景,首先,将随机响应面法与基坑工程三维模型相结合,求解极限功能函数的响应面方程,并用标准Monte Carlo法计算失效概率和可靠指标,探讨采用倒边盖挖逆作法作为基坑支护结构施工方法的可行性;其次,基于该响应面方程,以土体的弹性模量为随机变量参数,采用马尔可夫链蒙特卡罗子集模拟法(MCMC子集模拟法)计算基坑支护结构的失效概率,并与标准Monte Carlo法结果进行对比分析。结果表明：当支护结构最大侧移控制指标为25 mm时,计算得到的可靠指标均大于4.6,即采用倒边盖挖逆作法施工过程中基坑是安全的;10万次和50万次标准Monte Carlo法计算得到的失效概率均为零,说明对于标准Monte Carlo法,在计算小概率失效问题时10万与50万的样本量是不足的;而MCMC子集模拟法用2.98万个样本计算出的结果与标准Monte Carlo法采用100万个样本计算的结果相对误差仅为1.7%,表明MCMC子集模拟法对于小概率失效问题求解的优势。所提算法在一定...     

贵州金融深化弱经济增长效应的成因分析

改革开放以来,伴随贵州经济的持续较快增长,贵州金融业得到了长足的发展,经济的金融化过程不断加深,金融总量持续稳定增长,结构不断改善,自身供给能力不断增强。但与其他省份相比,贵州金融基础薄弱,发展相对滞后。本文提出了贵州金融深化的弱经济增长效应,并剖析了这一效应的成因。     

现金股利对会计信息的治理

会计只能提供相对相关和可靠的信息,在控制逆向选择和道德风险方面作用有限,形成了会计目标实现的障碍,这迫使投资者不得不去寻找其他信息渠道,以期更有效地决策。现金股利就是投资者寻找的信息渠道之一,它和会计信息在提高信息的相关性、可靠性以及控制逆向选择和道德风险方面共同发挥作用,并形成竞争态势,这种竞争态势实质上起到了对会计信息的治理作用。     

坚持还是放弃：失败恐惧的认知效应及其对创业坚持的影响

基于情绪认知评价理论,从情绪和认知两个视角分析失败恐惧对创业坚持的影响与边界条件。通过对316名创业者的问卷调查发现：创业失败恐惧对创业坚持行为具有负向影响;自我效能感在失败恐惧和创业坚持之间发挥中介作用;成长型思维调节失败恐惧对自我效能感的负向影响,成长型思维通过降低失败恐惧对自我效能感的负向作用来促进创业坚持行为。依据“情感—认知—行为”的逻辑从创业者的情绪和认知视角综合分析失败恐惧对创业坚持的影响,既为创业者中途退出创业活动提供解释思路和理论洞见,也为全面理解创业坚持行为提供理论指导。     

Openness to trade as a determinant of the macroeconomic elasticity of substitution

Several theoretical and empirical studies on economic growth consider the macroeconomic elasticity of substitution between capital and labor as a measure of economic flexibility that depends on technological as well as institutional aspects. One institutional aspect of economic flexibility is openness to trade. I examine in a Heckscher–Ohlin model with two large countries trading intermediate goods how openness affects the elasticity of substitution. If the technology has a constant elasticity of substitution in a closed economy, opening up to trade raises the elasticity of substitution only in the country that accumulates capital at a faster rate.     

Does Improved Environmental Policy Enhance Economic Growth?

The environmental impacts on an economy is studied over time using endogenous growth theory. Externalities from the environment on production are central in the analysis, and we examine whether an optimal path realizes more rapid economic growth. The paper focuses mainly on developing countries, where production is largely influenced by the environmental quality. The result of the analysis indicates that the economic growth rate may not depend on the internalization of the environmental externality, but rather on the internalization of the human capital externality. The level of economic activity, however, generally seems to depend on the internalization of both externalities.     

Anticipated Environmental Policy and Transitional Dynamics in an Endogenous Growth Model

This paper makes a new attempt toinvestigate how an anticipatedenvironmental policy governs the transitionaldynamics of an economy when pollutionexternality is taken into account. Themodeling strategy we use is an AK technologyendogenous growth framework with an endogenousleisure-labor choice. It is found that, unlikeinelastic labor supply framework, a rise inpublic abatement expenditure will stimulate thebalanced economic growth rate. It is alsofound that public abatement technology plays animportant role in determining the transitionaladjustment of the economic growth rate inresponse to a pre-announced environmentalpolicy.     

县域经济差异成因的空间统计分析——以云南省为例

基于新经济增长理论,采用空间计量模型、R软件和Moran指数对云南省各县域的经济增长的空间相关性进行了检验,运用空间计量模型对各县域经济增长的差异进行了空间计量分析。结果表明：云南省各县域的经济发展存在明显的正相关,影响云南省经济发展差异的主要因素有城镇化率、工业化、财政支出等。     

LABOUR PRODUCTIVITY GROWTH IN THE LONG RUN: JAPAN, 1600–1909

This article examines long-term labour productivity change in Japan from the early seventeenth century to the nineteenth century. We constructed sectoral labour force estimates based on the methodology presented in a previous study, who provided a sectoral GDP series covering the Tokugawa period. Our results show the industrial structure in the Tokugawa period remained relatively stable in comparison with the economy after the Meiji Restoration. Nevertheless, the estimates of sectoral labour productivity suggest expansion of the market economy in Tokugawa Japan influenced the development of industrialisation after the Meiji Restoration.