利率平价模型在中国的表现形式及约束条件研究

首先通过实证分析指出中国利率、汇率变动对经典利率平价模型契合度很低，然后提出适于中国现状的利率平价模型，并结合中国实际对模型进行分析且提出了制约利率平价模型有效性的约束条件。     

中国宏观经济和金融总量的非线性研究

本文以变化相对温和的非线性指数平滑转移ESTAR模型为基础对1952-2008年间中国宏观经济和金融总量进行线性检验,采用KSS非线性单位根检验方法探究其动态特征,并利用KSS非线性协整方法进一步考察非平稳总量问的动态关系.结果发现本文检验的9个总量序列全部表现为非线性,其中7个总量表现为非线性平稳,而实际人均GDP和就业人数2个总量则具有单位根,且二者之间不存在非线性长期稳定均衡关系.     

利率平价理论有效性的实证研究

为了验证利率平价理论对人民币汇率的解释能力,本文采用协整检验、Granger检验、误差修正模型等实证研究方法,对2005年7月以来人民币对美元的即期和远期汇率以及中美两国间利率水平差异的数据进行了实证研究.结果表明,人民币汇率决定机制并不符合利率平价理论,对此,我们结合中国的实际情况分析了其中的原因.     

利率平价理论的分析与探讨

在对我国的经济体制改革过程进行阶段性划分的基础上,本文采用分阶段线性回归和断点检验方法,研究了利率平价在中国转轨经济时期各阶段的拟合性,同时运用新制度金融学这一新的分析范式进行理论解释。研究发现,由于深层次制度等方面的原因,利率平价在我国的拟合性较低。但是,随着我国合理的产权制度的逐步确立、利率市场化改革的深入和货币自由兑换的逐步实现,利率平价在我国的拟合性正逐渐优化。     

基于利率平价理论的人民币汇率与利率关系的实证分析

利率平价理论直接给出了汇率与利率的关系式,是分析人民币汇率与利率相关性的理论基础.通过对1994年至今人民币利率、美元利率及人民币对美元汇率的年度数据的实证分析,使用格兰杰因果检验、协整检验等方法进行了研究,得出利率平价理论在我国失灵的结论,并试图对此结论进行分析,进而揭露利率平价理论在我国不适用的原因,并据此提出了一些相关的政策建议.     

经验贝叶斯单位根检验

为避免经典贝叶斯检验中先验分布函数对检验的影响,文章应用经验贝叶斯方法对一阶自回归模型作单位根检验,通过收集历史数据,应用非参数经验贝叶斯方法,推导出贝叶斯决策函数。Monte-Carlo模拟显示,经验贝叶斯方法与经典统计方法相比,经验贝叶斯方法有较高的势;与传统贝叶斯方法相比,经验贝叶斯方法作单位根检验比传统的贝叶斯方法有更高的势。文章最后提供了一个金融实例,收集了NASDAQ综合指数从2015年9月21至2016年7月6日的数据,对其收益率作单位根检验,验证收益率序列是一个平稳过程。     

人民币购买力平价实证检验

购买力早价理论是最具解释力的汇率决定理论,也是其他汇率决定理论的基础,经常被各国用作制定汇率政策的主要依据.本文使用计量经济模型建构专用软件PcGive,对1997年1月至2007年1月时段的人民币兑美元名义汇率和中美两国消费者价格指数数据进行单位根和Johansen协整的再检验,结果表明:购买力平价理论是能够在一定程度上解释人民币兑美元汇率的,但不足以成为我国制定人民币汇率政策的依据.     

非抛补利率平价之谜——基于发达经济体与新兴经济体的实证检验

非抛补利率平价之谜的传统检验模型忽视了远期汇率变化和利率差这两项,而基于抛补利率平价公式推导出的扩展检验模型则表明应包括这两项。经传统检验模型和扩展检验模型进行的实证检验表明,发达经济体和新兴经济体的回归系数都介于0到1之间;非抛补利率平价主要在发达经济体成立,而在新兴经济体不成立。扩展检验模型要优于传统检验模型,部分发达经济体基于传统检验模型的非抛补利率平价不成立,但基于扩展检验模型的非抛补利率平价成立,表明已有文献中一些发达经济体非抛补利率平价不成立的原因可能是传统检验模型本身所导致的。     

利率平价理论对人民币汇率的适用性研究

利率平价理论通过资金流动的角度描述了汇率和利率之间的关系,并常常被作为一种基本关系式而运用于其他汇率理论的分析中.本文选取从2006年10月到2009年11月期间1个月和3个月的NDF市场远期汇率、人民币SHIBOR利率、美元LIBOR利率基于无抛补的利率平价模型验证该理论.并得出在像我国这样实施外汇管制的国家中,利率平价理论难以完全实现的结论.     

人民币购买力平价实证检验

购买力平价理论是最具解释力的汇率决定理论,也是其他汇率决定理论的基础,经常被各国用作制定汇率政策的主要依据。本文使用计量经济模型建构专用软件PcGive,对1997年1月2007年1月时段的人民币兑美元名义汇率和中美两国消费者价格指数数据进行单位根和Johartsen协整的再检验,结果表明：购买力平价理论是能够在一定程度上解释人民币兑美元汇率的,但不足以成为我国制定人民币汇率政策的依据。     

THE REAL INTEREST RATE DIFFERENTIAL: INTERNATIONAL EVIDENCE BASED ON NON-LINEAR UNIT ROOT TESTS

This paper aims at testing international parity conditions by using non-linear unit root tests advocated by Kapetanios et al . (2003, KSS). Results from the KSS tests based on 17 countries (G7 and 10 Asian countries) overwhelmingly show that the adjustment of real interest rates towards real interest rate parity (RIP) follows a non-linear process except for the Taiwan, Hong Kong and Philippines relationships with both the USA and Japan. Overall, the empirical results are in favour of RIP using the USA and Japan as the centre countries but only if non-linearities are accounted for in the data-generating process. Our findings confirm that interest rate differentials, like the real exchange rates reported in recent literature, display a non-linear mean reversion process.     

Testing of Unit Root Cycles in the Swedish Economy

In this article we examine the existence of unit root cycles in 11 long Swedish macroeconomic time series. We use a version of the tests of Robinson (1994) that permits us to test this type of hypothesis, which is based on the Gegenbauer processes. The results show that, for most of the series, the unit root cycles occur approximately every six periods. However, in case of the GDP deflator and wage rates, first differences may be required before proceeding to the analysis of the cyclical structure.JEL code: C22     

人民币汇率合理性判断--用平行数据单位根对人民币购买力平价的经验分析

本文讨论了人民币汇率是否合理、人民币是否应该升值的两个判断标准,采用四种新发展起来的平行数据单位根检验法,对1978年1月-2004年9月的人民币购买力平价进行了检验.检验的结果普遍支持了购买力平价,可以认为人民币汇率的长期基础是合理的.但我们认为由于汇率在当代存在着两重作用与二重性,现有汇率理论只能部分地解释汇率的决定.论文对汇率的两重作用与二重性进行了分析.     

Testing the validity of PPP theory for African countries

This study examines the purchasing power parity theory for 14 African countries by applying a recent composite time series method that incorporates the Fourier approximation. The structural breaks are modelled as a gradual smooth process by means of a Fourier component. The Fourier unit root test failed to find any evidence showing that real exchange rates for these 14 countries have mean-reverting tendencies. However, both cointegration and Fourier cointegration tests detect a stable long-term relation between the nominal exchange rate and relative price levels for 8 out of 14 countries; moreover, for five countries Fourier component in cointegration analysis is found to suit quite well.     

A new unit root test based on F-statistic in ESTAR framework

This article proposes a new F-type unit test in the exponential smooth transition autoregressive framework. We derive the asymptotic nonstandard distribution of the proposed test and explore its finite sample properties; simulation results show our test has greater power than the t_kss test proposed by Kapetanios et al.(2003). Finally, an application on the real exchange rates further underpins its superiority.     

Real interest rate parity in Asian countries: evidence from the quantile unit root test

This article studies the real interest rate parity (RIP) for several Asian countries. This is done by examining the stationarity in the real interest rate differentials (rids) with respect to the US using the quantile unit root test. Our results show that rids exhibits unit-root behaviours in the lower quantile levels, and mean reversion in the upper quantile levels. Furthermore, large positive shocks tend to induce strong mean reversion and the adjustment towards the long-run equilibrium level is faster as rids gets larger, with shorter half-lives in the extreme quantile levels.     

A revisit on real interest rate parity hypothesis – simulation evidence from efficient unit root tests

A set of unit root tests are applied to test the existence of long-run real interest rate parity among the G-10 countries over the period 1971M1 to 2007M2. Rather than trusting the asymptotic distributions, this article uses simulation techniques to establish the small sample distributions of these tests, conditional on the stationary and nonstationary processes. The empirical results indicate that the tests have stable finite-sample sizes and higher size-adjusted powers such that the two estimated processes can be distinguished from each other. Thus, for six of the nine countries, their series are more likely to come from the estimated Autoregressive (AR) stationary process than from the nonstationary process. Noticeably, the testing results are rather different from those using the asymptotic distributions, in which only three countries support the real interest rate parity.     

New evidence of regional income divergence in post-reform Russia

This article investigates regional income convergence in Russia during 2000–2008. We test the hypothesis in which income divergence across regions of the country should give place to income convergence as the country moves toward free market economy with strong market institutions. The study contributes to the existing literature by using the exponential smooth autoregressive Augmented Dickey–Fuller (ADF) unit root test in a panel setup, a novel econometric technique, which encompasses cross sectional dependence. Results show strong evidence of on-going regional income divergence in post-reform period.     

Quantile unit root test and the PPP in Africa

In this study, we apply the Quantile unit root test and revisit the Purchasing Power Parity (PPP) in 20 African countries using real effective exchange rates over the period 1971Q1 to 2012Q4. While traditional unit root tests fail to reject unit root hypothesis in most of the countries, results from Quantile unit root test reject unit root null hypothesis in Ghana, Mauritius, Niger, South Africa, and Togo, providing support for the PPP at least in these five countries. We further estimate the half-life based on Quantile autoregressive (QAR) model to be about 4.57–7.96 quarters (1–2 year).     

Testing the theory of PPP for emerging market economies that practice flexible exchange rate regimes

This study aims to test the long-run validity of purchasing power parity by using Fourier quantile unit root and Fourier cointegration analyses for 12 emerging market economies that practice a flexible exchange rate regime. With the Fourier approach, structural breaks are modelled as a gradual and smooth process. Fourier quantile unit root test results show that real exchange rate series are stationary for Colombia, India, Philippines, Poland, South Africa, and Turkey. On the other hand, Fourier cointegration test results reveal that purchasing power parity is valid for Brazil, Colombia, India, Mexico, South Africa, Thailand, and Turkey.