中国的利率体系与利率市场化改革

利率对宏观经济均衡和资源配置有重要导向意义。央行确定政策利率要符合经济规律、宏观调控和跨周期设计需要。目前,中国的真实利率略低于经济增速,处于较为合理水平。中国已形成较为完整的市场化利率体系,主要通过货币政策工具调节银行体系流动性,释放政策利率调控信号,在利率走廊的辅助下,引导市场基准利率以政策利率为中枢运行,并通过银行体系传导至贷款利率,调节和优化资源配置,实现货币政策目标。中国具备继续实施正常货币政策的条件,将尽可能地延长正常货币政策的时间,目前不需要实施资产购买操作。在市场化利率体系中,收益率曲线非常重要,它反映利率由短及长的期限结构,可为各类金融产品和市场主体提供定价参考。收益率曲线的短端为货币市场基准利率,直接受央行货币政策操作的影响;长端则为国债收益率,主要反映市场对未来宏观经济走势的预期。经过多年发展,我国的国债收益率曲线应用日益广泛,整体趋于成熟,而在市场基础方面还有进一步提升的空间。     

Economic growth, international trade and air pollution: A decomposition analysis

This study analyzes the impact of economic growth and international trade on the level of air pollution. This is done by the estimation of the Structural Equation Model with two factors describing the structure of economic activity and air pollution intensity. It is further assumed that there is causal link between these two factors and that they are influenced by per capita income, international trade intensity and the Freedom House Index.The estimation results suggest that in the developing countries analyzed both international trade and per capita income lead to changes in the structure of economic activity and - as a consequence - to the increase in air pollution. In addition, the estimation results suggest that the impact of economic growth on air pollution intensity varies between the developing and developed countries. In the developing countries, this impact occurs through the change of the structure of economic activity, while in the developed countries, this impact is mainly direct and occurs through the sum of the scale effect and income effect. The positive sign of this impact suggests the dominance of the scale effect over the income effect.     

环境污染与经济增长方式转变——来自中国省际面板数据的证据

研究显示,尽管在中国主要污染物的排放增长趋势近年来有所减缓,但是大多数污染物的排放并不具有典型的环境库兹涅茨曲线(EKC)特征,还有大量的污染物的排放总量随着经济的发展而增加,受中国重化工业发展对能源需求增加的影响,二氧化硫等污染物的排放仍在继续增加,中国污染物的排放与人均GDP的关系并未真正形成.这就要求中国政府改变经济增长方式,转变政府职能,从单纯追求GDP及其由此而来的财政收入,转向更加注重经济增长的可持续性.     

Maxbias curves of robust scale estimators based on subranges

A maxbias curve is a powerful tool to describe the robustness of an estimator. It is an asymptotic concept which tells how much an estimator can change due to a given fraction of contamination. In this paper, maxbias curves are computed for some univariate scale estimators based on subranges: trimmed standard deviations, interquantile ranges and the univariate Minimum Volume Ellipsoid (MVE) and Minimum Covariance Determinant (MCD) scale estimators. These estimators are intuitively appealing and easy to calculate. Since the bias behavior of scale estimators may differ depending on the type of contamination (outliers or inliers), expressions for both explosion and implosion maxbias curves are given. On the basis of robustness and efficiency arguments, the MCD scale estimator with 25% breakdown point can be recommended for practical use. Received: February 2000     

Identification and dimension of the NAIRU

In this paper, we have re-examined the identification of the NAIRU and presented a well-defined reduced form for analysing the equilibrium unemployment rate, using a cointegrated VAR model. We have stated that the NAIRU estimates using the conventional reduced form (or Phillips curve) models are misleading since the natural rate of unemployment cannot be considered as a fixed point calling for the ceteris paribus assumption for all the data involved. This implies that the NAIRU estimates are unable to provide valuable information on the labour market status.     

货币政策地区效应——基于地区总供给曲线的理论与实证分析

本文着重检验了我国区域经济中的基于产出缺口的地区短期总供给曲线的存在性,进而分析地区短期总供给曲线对货币政策地区效应的影响。文章首先对地区短期总供给曲线存在的可能性进行了理论解释,应用卡尔曼滤波方法估算了我国各地区的产出缺口,然后运用ARMA模型说明预期通货膨胀率形成机制,最后以通货膨胀率与其预期之差、外部需求冲击等作为解释变量对产出缺口进行回归,结果发现,我国东部地区的短期总供给曲线较中西部地区的短期总供给曲线更平坦,因而东部地区货币政策效应要强于中西部地区。     

环境库兹涅茨曲线假说检验研究进展与展望

[目的]EKC曲线描述的是生态环境质量随着经济增长呈现先恶化后改善的趋势,即存在倒“U”型关系。为了了解EKC假设检验目前研究现状与存在的主要问题,深入探讨未来研究重点和方向。[方法]系统梳理经济发展对生态环境质量影响的EKC假说检验文献,以期丰富EKC检验的理论基础,进一步促进经济、生态环境健康持续发展。[结果]各种污染物指标与人均GDP间呈现出倒“U”型、正“U”型、倒“N”型、线型(或“~”型)等多种关系。[结论]未来研究重点和方向是:(1)研究形成EKC曲线背后的作用机理;(2)合理构建反映整体生态环境质量综合指标及影响经济发展的多因素指标;(3)合理构建经济发展与生态环境相互作用的理论模型,并在研究中引入综合方法;运用空间计量模型实证检验EKC假说;(4)国内对小城镇和欠发达地区经济发展对生态环境影响的EKC假说检验。     

Relationship between inflation and relative price variability in India

The paper attempts to investigate the relationship between relative price variability (RPV) and aggregate inflation rate through parametric and semi-parametric methods (kernel regression method). Monthly data of wholesale price index is used for the period from February 1995 to March 2014 for this purpose. Both the parametric and semi-parametric methods lead us to the non-monotonic relationship between RPV and inflation. An attempt has also been made to determine the optimal inflation rate that would minimize RPV.     

基于情感曲线的高速铁路旅客个性化服务评价权重设计

为满足高速铁路旅客日益增长的个性化服务需求,优化现有高速铁路客运服务体系,研究影响高速铁路旅客服务评价的个性化因素。通过服务接触理论划分服务环节、情感曲线量化旅客服务评价,得出旅客服务需求差异,在此基础上设计个性化服务评价权重。结合北京南站、郑州东站,西安北站和成都东站的实地调研数据,对高速铁路旅客个性化服务评价权重的设计方法进行验证,结果表明:考虑乘客的情感曲线进行权重设计能够真实反映旅客个性化服务需求,为优化现有高速铁路客运服务评价体系提供可行方案。     

Testing the Environmental Kuznets Curve hypothesis on land use: The case of Romania

The aim of the present study is to test empirically the Environmental Kuznets Curve (EKC) hypothesis for 42 Romanian counties over the 2000-2014 period. Specifically, we investigate the existence of an inverted U-shaped curve relationship between residential built-up land and economic development in a low-income EU country undergoing rapid and profound transition. We do so by making innovative use of spatial panel econometric techniques. Contrary to our expectations, the results indicate an inverted EKC, implying that higher levels of residential built-up area occur for higher levels of wealth. Moreover, we find that the built-up land in Romania mainly reflects processes of urban expansion, such as sprawl or suburbanization, that may have harmful environmental and social consequences. Spatial spill-overs in terms of built-up land arise and spread, albeit to a limited extent, to neighbouring locations. These findings are of potential significance for policy makers, because they highlight the need for coordination among neighbours. Furthermore, strengthening the institutional framework and local tax management, and planning urban regeneration better could curb and even reverse the extensive built-up land expansion and real estate speculation.