国家低碳战略提高了企业全要素生产率吗?——基于低碳城市试点的准自然实验

低碳城市试点是推进国家治理体系和治理能力现代化的重要战略方向,并且带动、突破与引领全国低碳发展,而低碳城市试点政策的实施也为企业提高全要素生产率提供了重要契机.以低碳城市试点作为准自然实验,基于2008-2019年沪深A股上市企业数据及与企业所在城市进行匹配的城市面板数据,采用渐进双重差分法考察国家低碳战略对企业全要素生产率的影响.研究发现:(1)低碳城市试点政策能够提高企业全要素生产率,并且在进行平行趋势检验、安慰剂检验、PSM-DID检验等一系列稳健性检验后,结论依然成立.(2)低碳城市试点政策会降低高碳排放行业企业全要素生产率,但有助于提高非国有企业全要素生产率.(3)低碳城市试点政策通过缓解企业融资约束、提升企业技术创新水平与企业资本配置效率来促进企业全要素生产率的提高.研究丰富了将低碳城市试点切入企业层面进行政策效应评估的理论研究和经验证据,是基于中国情境对"波特假说"相关领域研究的补充,为低碳城市试点的深入推进及企业以该试点为契机来提高全要素生产率提供了政策启示.     

Asset‐based poverty transition and persistence in rural China

This article tests empirically for transition and persistence of poverty in rural China based on the theory of asset‐based poverty traps. It proposes an analytical framework mitigating the problem of endogenous switching between accumulation regimes and disentangling the true state‐dependence of poverty. Specifically, a dynamic asset threshold separating households into downward and upward mobility regimes is identified after taking households’ unobserved characteristics and observed regime‐differentiated accumulation strategies into account. The static analysis identifies causality running from settling into a downward mobility regime to the probability of poverty measured by consumption. Furthermore, allowing for endogenous initial poverty status, the dynamic analysis finds strong true state‐dependence in poverty. Households with the same characteristics are nearly twice as likely to be poor as if they had not previously switched to the accumulation regime. Assets below the dynamic threshold serve as a conduit through which poverty propagates itself. Factors that help to break this vicious circle are identified.     

论新形势下图书馆科技信息人才的素质要求及培育

信息社会的发展对高校图书馆科技信息管理工作创造了新的发展机遇与挑战。如何提高图书馆科技信息管理工作质量 ,提高图书馆专业人员素质 ,培育图书馆科技信息人才成为构建现代化、信息化、智能化图书馆关键所在     

Nonparametric fixed effects model for panel data with locally stationary regressors

We develop methods for inference in nonparametric time-varying fixed effects panel data models that allow for locally stationary regressors and for the time series length $T$ and cross-section size $N$ both being large. We first develop a pooled nonparametric profile least squares dummy variable approach to estimate the nonparametric function, and establish the optimal convergence rate and asymptotic normality of the resultant estimator. We then propose a test statistic to check whether the bivariate nonparametric function is time-varying or the time effect is separable, and derive the asymptotic distribution of the proposed test statistic. We present several simulated examples and two real data analyses to illustrate the finite sample performance of the proposed methods.     

Relocating China's New Role in Global Business in Future

As we enter the 21st century,during the first decade in this fully internationalized new world, Chinese commerce has experienced conflict,compromise and cooperation with the existing economic order.     

China to Promote Investment in Jamaica

Jamaica is one of China＇s important trade partners in the English-speaking Caribbean, in recent years, bilateral trade has developed rapidly, although last year, because of the economic crisis, bilateral trade has been greatly affected.According to China Customs statistics, bilateral trade in 2008 amounted to US$291 million. Influenced by the financial crisis, bilateral trade between China and Jamaica in 2009 was US$2.19 million, down 25.7% when compared with the same period in 2008. However, with the continuous development of the two economies, bilateral economic and trade has great potential. Dur- ing the state visit of the Jamaican Prime Minister to China,     

湖南发展县域经济的问题、思路与对策分析

县域经济在国计民生中占有特殊重要的地位,是经济发展和社会稳定的重要基础,加快县域经济发展,不仅十分必要,而且非常紧迫。尽管湖南的县域经济仍然保持一定的发展速度,但深层次的矛盾和问题已经暴露出来,发展遇到了许多新的困难,已经开始影响到农村社会的稳定与发展。     

汇市干预的理论与实证分析——来自日本的经验

本文以颇具代表性的日本货币当局外汇干预的模式为参照系,对当今世界资金规模最大、金融领域最前沿的外汇市场从理论和实践的角度进行论证,旨在为未来我国人民币国际化后所必将产生的外汇干预等相关问题提供具有实际意义的建议与理念。     

口诀法快速绘制梁的内力图

绘制梁的内力图是正确设计和校核梁的关键步骤,其绘制方法虽有多种,但如何快速和准确的绘制,尚有待进一步探索,本文用实例阐述了用口诀法快速绘制梁内力图的步骤。     

我国商业银行利率敏感性缺口分析

金融自由化的迅猛发展使得中国银行业正面临着严峻的利率风险,识别和衡量利率风险并提升国内商业银行的利率风险管理能力,是我国商业银行利率风险管理面临的迫切问题。本文针对目前我国商业银行在利率市场化进程中所表现出来的特征,以中国工商银行为例通过利率敏感性缺口的方法实证分析我国商业银行目前所处的风险状态,并给出利率风险的防范和规避措施。