人民币汇率购买力平价的界限检验

本文采用界限检验(bounds test)方法对人民币汇率购买力平价进行经验分析。与协整检验不同，界限检验具有直接检验变量间长期相关性的优点，而不管各相关变量是零阶单整、一阶单整还是混合形式，不必预先对相关变量进行单位根检验。通过对人民币兑德国马克、港币、日元和美元四种名义汇率的界限检验，本文的经验分析结果显示，1994年汇率制度改革以来人民币汇率购买力平价得到部分经验证据的支持。其中，人民币兑美元和人民币兑港币汇率的走势符合购买力平价理论，而人民币兑德国马克和人民币兑日元汇率不符合购买力平价理论。     

购买力平价与金融危机基于结构突变下的面板单位根检验

本文采用外生结构突变下面板数据单位根检验方法和传统的检验方法，比较研究了东南亚七国或地区的实际汇率受金融危机冲击的影响，发现东南亚七国或地区的实际汇率是带有结构突变的退势平稳过程，外生结构突变条件下的面板单位根检验结果支持购买力平价理论，实际汇率对购买力平价的背离是短期的：但在不考虑结构突变的情况下，却得出不同的结论，而蒙特卡洛模拟实验表明前者更为可信。     

中国金融发展与贸易开放的变结构协整分析

本文运用变结构协整技术分析了我国金融发展与贸易开放之间的长期均衡及短期动态关系.采用循序检验法确定结构突变点,发现在1994年和2003年金融发展与贸易开放之间的协整关系发生突变；对1978～2007年的数据进行变结构协整检验,得到两段变结构关系,并建立了误差修正模型.结果表明,即便是在相关序列存在结构性突变的情况下,...     

一个时变系数协整回归模型及应用研究

本文通过扩展现有Johansen协整回归模型,允许协整回归模型的系数具有时变特性,并且利用切比雪夫时间多项式来模型化时变系数,提出一个能够捕捉平滑时间转换的时变误差修正模型,并利用极大似然法进行估计。此外,本文还构建了一个用于检验Johansen非时变协整作为原假设的似然比检验,并推断其渐近服从卡方分布。最后应用本文所提出的时变系数协整回归模型检验了人民币汇率购买力平价,结果表明人民币对美元名义汇率、国内消费者价格指数以及美国消费者价格指数之间存在时变协整关系,但系数的符号与理论预期不一致。     

人民币汇率购买力平价的实证检验——基于中国加入SDR后的视角

2005年7月开始的人民币汇率形成机制改革使人民币均衡汇率的确定逐渐具有了市场基础。2015年11月人民币加入SOR对我国汇率市场化程度提出了新要求。在这种背景下，使用2005—2015年数据测算购买力平价理论在我国人民币与其他国家货币双边汇率决定中的有效性，同时测算对购买力平价偏离的半衰期，结果表明：人民币与印度卢比、韩元和南非兰特的双边汇率支持弱购买力平价成立，但半衰期存在差别；强购买力平价没有得到支持。     

抛补利率平价理论的实证检验——以美元、港币汇率和利率关系为例

本文用港币兑美元的即期汇率、远期汇率和香港、美国的名义利率对抛补利率平价理论进行实证检验。分别进行了单位根检验、协整检验,因为没有发现数据的协整关系,因此仅对数据的一阶差分进行了回归分析和格兰杰因果关系检验,发现实际数据并不满足抛补利率平价。最后,对不满足利率平价理论的原因进行了探讨。     

关于机理变化型变结构非线性协整的研究

变结构非线性协整是协整理论发展的必然的趋势,也是经济系统复杂多变的必然需求,文章补充了变结构非线性协整的定义,并提出了机理变化型变结构非线性协整,指出其本质问题即单位根的结构突变检验,总结了几种结构突变的单位根检验方法,讨论了变结构点的估计方法,给出了基于Chow统计量的变结构协整检验和建模方法。     

人民币升值对房地产行业影响的实证研究

基于证券市场数据,通过相关分析、协整检验、Granger因果检验等计量方法,研究了汇率制度改革后房地产指数与人民币汇率之间的关系。实证结果表明,人民币汇率与房地产指数存在着长期稳定的协整关系,汇率波动是房地产指数的长期以及短期Granger原因,人民币升值是房地产板块跑赢大盘的重要原因。     

人民币升值对地产行业影响的实证研究

基于证券市场数据,通过相关分析、协整检验、Granger因果检验等计量方法,研究了汇率制度改革后房地产指数与人民币汇率之间的关系。实证结果表明,人民币汇率与房地产指数存在着长期稳定的协整关系,汇率波动是房地产指数的长期以及短期Granger原因,人民币升值是房地产板块跑赢大盘的重要原因。     

中美购买力评价分析与中国汇率制度的调整——基于2005年7月汇率改革以来的实证分析

自2004年以来,西方国家基于购买力平价理论,纷纷对我国施加压力,要求人民币升值,以减轻本国的贸易赤字。他们通过比较人民币与其本国货币的购买力水平后发现,我国货币汇率严重低估。文章拟通过分析2005年汇率改革以后购买力平价理论在我国的适用性,说明购买力平价理论在我国缺乏实用性以及我国汇率形成制度的缺陷,并提出完善人民币汇率形成机制的方向和途径。     

Testing cointegration relationship in a semiparametric varying coefficient model

In this paper, we develop two cointegration tests for two varying coefficient cointegration regression models, respectively. Our test statistics are residual based. We derive the asymptotic distributions of test statistics under the null hypothesis of cointegration and show that they are consistent against the alternative hypotheses. We also propose a wild bootstrap procedure companioned with the continuous moving block bootstrap method proposed in  Paparoditis and Politis (2001) and  Phillips (2010) to rectify severe distortions found in simulations when the sample size is small. We apply the proposed test statistic to examine the purchasing power parity (PPP) hypothesis between the US and Canada. In contrast to the existing results from linear cointegration tests, our varying coefficient cointegration test does not reject that PPP holds between the US and Canada.     

A Simple Test for Cointegration in Dependent Panels with Structural Breaks*

This paper develops a very simple test for the null hypothesis of no cointegration in panel data. The test is general enough to allow for heteroskedastic and serially correlated errors, unit‐specific time trends, cross‐sectional dependence and unknown structural breaks in both the intercept and slope of the cointegrated regression, which may be located at different dates for different units. The limiting distribution of the test is derived, and is found to be normal and free of nuisance parameters under the null. A small simulation study is also conducted to investigate the small‐sample properties of the test. In our empirical application, we provide new evidence concerning the purchasing power parity hypothesis.     

Distribution approximations for cointegration tests with stationary exogenous regressors

The distribution of a functional of two correlated vector‐Brownian motions is approximated by a Gamma distribution. This functional represents the limiting distribution for cointegration tests with stationary exogenous regressors, but also for cointegration tests based on a non‐Gaussian likelihood. The approximation is accurate, fast and easy to use in comparison with both tabulated critical values and simulated p‐values. The proposed procedure is applied to a UK model investigating purchasing power parity. Copyright © 2005 John Wiley & Sons, Ltd.     

Testing long‐run PPP with infinite‐variance returns

This paper investigates the long‐run purchasing power parity hypothesis when exchange rate returns and inflation rates are assumed to be heavy‐tailed stochastic processes. More specifically, residual‐based and likelihood‐ratio‐based cointegration tests of PPP that explicitly allow for infinite‐variance innovations are applied to monthly data (1973:1–1999:12) for Belgium, Canada, Denmark, France, Germany, Italy, Japan, the Netherlands, Norway, Spain, Sweden, and the United Kingdom. Our test results are marginally less supportive of PPP when the innovations are assumed to be infinite‐variance, α‐stable processes. Copyright © 2003 John Wiley & Sons, Ltd.     

A Comparative Study of Unit Root Tests with Panel Data and a New Simple Test

The panel data unit root test suggested by Levin and Lin (LL) has been widely used in several applications, notably in papers on tests of the purchasing power parity hypothesis. This test is based on a very restrictive hypothesis which is rarely ever of interest in practice. The Im–Pesaran–Shin (IPS) test relaxes the restrictive assumption of the LL test. This paper argues that although the IPS test has been offered as a generalization of the LL test, it is best viewed as a test for summarizing the evidence from a number of independent tests of the sample hypothesis. This problem has a long statistical history going back to R. A. Fisher. This paper suggests the Fisher test as a panel data unit root test, compares it with the LL and IPS tests, and the Bonferroni bounds test which is valid for correlated tests. Overall, the evidence points to the Fisher test with bootstrap-based critical values as the preferred choice. We also suggest the use of the Fisher test for testing stationarity as the null and also in testing for cointegration in panel data.     

A Simple Panel‐CADF Test for Unit Roots*

In this paper, we propose a simple extension to the panel case of the covariate‐augmented Dickey–Fuller (CADF) test for unit roots developed in Hansen (1995) . The panel test we propose is based on a P values combination approach that takes into account cross‐section dependence. We show that the test has good size properties and gives power gains with respect to other popular panel approaches. An empirical application is carried out for illustration purposes on international data to test the purchasing power parity (PPP) hypothesis.     

Purchasing power parity as a long-run relation

Dickey–Fuller and Stock–Watson tests of purchasing power parity (PPP) as a long-run proposition are provided within the cointegration framework proposed by Granger. Since different countries use different weights to construct price indices, the traditional constraint that the coefficients on the price indices should be unity in the log-linear PPP relation is relaxed. The absence of a general PPP relation cannot be rejected. At most, a PPP relation is indicated in five out of fifteen country pairs that are examined. Even if a long-run PPP relation exists, it is not found to be useful in predicting future nominal exchange rates, which is consistent with efficient speculative markets.     

Panel LM Unit‐root Tests with Level Shifts*

This paper proposes a new panel unit‐root test based on the Lagrangian multiplier (LM) principle. We show that the asymptotic distribution of the new panel LM test is not affected by the presence of structural shifts. This result holds under a mild condition that N/T→k, where k is any finite constant. Our simulation study shows that the panel LM unit‐root test is not only robust to the presence of structural shifts, but is more powerful than the popular Im, Pesaran and Shin (IPS) test. We apply our new test to the purchasing power parity (PPP) hypothesis and find strong evidence for PPP.