汇率非线性因素在部分亚洲货币汇率中的特征——检验购买力平价论的新方法

当真实汇率运动实际上是非线性过程,而假设它为线性时,那么检验购买力评价理论的标准单位根检验通常是低效力的。文章运用带有单位根的门限自回归模型模拟了包括中国在内的6个亚洲主要新兴市场国家货币兑美元的真实汇率,发现它们都具有较强的非线性,说明了传统的线性方法不再具备模拟真实汇率的能力,且除人民币以外的其他5种货币的真实汇率都表现出了平稳非线性特征,在异动时期具有均值回归的趋势。周期性的金融危机是导致中国以外的其他5个国家货币的真实汇率出现异动的主要因素。人民币真实汇率的非线性行为则表现出了与其他国家不同的特点,导致它出现异动的主要因素为人民币对内和对外价格的相互背离,人民币真实汇率没有表现出向均值调整的趋势,甚至在异动时期呈现了向均值偏离的趋势。     

Purchasing Power Parity and Interest Parity in the Laboratory

This paper analyses purchasing power parity and uncovered interest parity in the laboratory. It finds strong evidence that purchasing power parity, covered interest parity, and uncovered interest parity hold. Subjects are endowed with an intrinsically useless (green) currency that can be used to purchase another useless (red) currency. Green goods can be bought only with green currency, and red goods can be bought only with red currency. The foreign exchange markets are organised as call markets. In the treatment analysing purchasing power parity, the price of the red good varies. In a second treatment, the interest rate on red currency varies. In a third treatment, the interest rate on red currency varies, and the price of the red good is random.     

Revisiting Purchasing Power Parity in OECD

This study revisits Purchasing Power Parity theory (PPP) in the 34 OECD countries during January 1994–August 2013. We use a new panel stationary test with both sharp breaks and smooth shifts, a novel approach to panel unit-root testing, proposed by Bahmani–Oskooee et al. (2014). The results indicate that the PPP holds in half of the 34 OECD countries. These results indicate the importance of proper modelling of both sharp breaks and smooth shifts in real effective exchange rate series of OECD countries.     

Theory and Tests of Generalized Purchasing-Power Parity: Common Trends and Real Exchange Rates In the Pacific Rim

The paper develops the theory of generalized purchasing-power parity (G-PPP) to explain the “stylized facts” of real exchange-rate behavior. the fundamental economic variables determining real exchange rates are nonstationary; thus, real rates are nonstationary. If the fundamentals are sufficiently integrated, as in a currency area, the real rates will share common trends. the theory is tested using the Pacific Rim nations. It is shown that G-PPP holds between each of the Pacific Rim nations and the large industrialized countries. There is only mild evidence that G-PPP holds among the Pacific Rim nations as a group.     

汇率、利率、税率：名义和实际

当前我国经济运行情况以及面临的问题 过去的一年里,我国经济保持了稳定增长的态势,在全球经济特别是关、日和欧三大经济体同时陷入衰退的情况下,2001年我国国内生产总值达到95800多亿元,同比增长率为7．3％。更令人感到鼓舞的是,中国在2001年加入WTO,正式成为世界贸易组织的一员,中国的对外开放进入了一个新的阶段。 但在成功数字的外表下,我们还应该看到中国经济的一些问题以及在2002年可能遇到或者已经遇到的一些难题。2001年中国经济增长前高后低,四个季度的经济增长一路滑坡,前3个季度的增长速度分别是8．1％、7．8％和7％,第4季度GDP增长也很难达到7％,11月份居民消费价格总水平比去年同月下降3％,又面临通货紧缩的威胁。2001年的经济增长,主要是由国内投资和消费需求的增长拉动的。由于国际经济严重衰退,一方面,我国出口增速下降,大约在6％左右,净出口减少,对经济增长的贡献度为负值;另一方面,促使外资流入加快,实际利用外资增长近20％,减弱了出口下降的影响。……     

Internal Relative Price Stationarity in Long-Run Purchasing Power Parity

This study demonstrates that the joint relationship among domestic traded-goods prices, dometic nontraded-goods prices, foreign traded-goods prices, and foreign nontraded-goods prices is important to understanding rejections or confirmations of long-run PPP. This joint relationship is defined as the "cross-country internal relative price structure." For nine of the ten pairs of countries studied, the cross-country internal relative price structure is found to be stationary; thus, factors other than the influence of nontraded-goods prices must be responsible for the rejections of long-run PPP.     

Purchasing Power Parity and the European single currency: Some new evidence

The effect of the single currency on the Purchasing Power Parity (PPP) hypothesis is examined in this study for the 15 EU countries, vis a vis the US dollar, before and after the advent of the euro. Standard as well as nonlinear unit root tests are employed on the time series dimension. Unit root tests reject PPP and the highest half-lives are observed after the introduction of the single currency. Panel unit root (Pesaran, 2007) and stationarity tests (Hadri and Kurozumi, 2008) that take into account cross-sectional dependence are also estimated. The results remain inconclusive as panel stationarity tests fail to support PPP whereas panel unit root tests fail to reject PPP for the whole sample and for the period before the introduction of the single currency.     

Long-Run Purchasing Power Parity and Structural Change: The Official and Parallel Foreign Exchange Markets For Dollars In Greece

This paper examines the Purchasing Power Parity theory from a long-run perspective in the presence of a parallel or 'black' market for US dollars in Greece using monthly data for the recent float. Johansen's FIML multivariate cointegration techniques is applied. Recent development associated with this procedure are considered. First, a formal test developed by Paruolo (1996) for the presence of I(2) and I(1) components in a ultivariate context is applied along with the estimation of the roots of the companion matrix for the correct determination of the cointegration rank. Second, given that two significant cointegration vectors were found, structural restrictions identifying the long-run relations of interest are specified as proposed by Johansen and Juselius (1994) and Johansen (1995b). Thus, the joint structure of PPP and long-run informational market efficiency could not be rejected. Furthermore, estimation of the error correction terms shows that the black market rate adjusts to eliminate any deviation from long-run PPP. Finally, stability tests proposed by Hansen and Johansen (1993) are applied and it is shown that the dimension of the cointegration space is simple dependent while the estimated coefficients do not exhibit instability in recursive estimations. [F31 F33]     

人民币升值背景下再谈购买力平价

中国人民银行于近日宣布人民币对美元汇率升值2%.在这一背景下,本文简要回顾了购买力平价理论（PPP）,并总结了国际上对中国购买力的测算方法,同时针对人民币汇率与我国PPP之间的较大差异,提出产生偏差的具体原因.最后得出结论：必须结合我国自身的改革进程和现实经济的运行特点来分析购买力平价,才能确定人民币汇率的合理水平.     

Productivity Trends in Europe: Implications for Real Exchange Rates, Real Interest Rates, and Inflation

The paper examines a long–run (neoclassical) framework in which differences in productivity growth across sectors and countries lead to inflation differentials. In a currency union, these inflation differentials imply cross–country differentials in real interest rates. The authors estimate the likely size of these differentials for European Union countries, discuss the potential costs of persistent inflation differentials, and comment on the conflicts they may cause within Economic and Monetary Union (EMU). The analytical framework is a variant of the Balassa–Samuelson "productivity hypotheisis," which relates sectoral productivity trends to trends in the relative price of home goods.     

The Canadian Dollar and Purchasing Power Parity during the Recent Float

This paper re-examines the purchasing power parity (PPP) concept for five bilateral Canadian dollar exchange rates. The Johansen cointegration technique is employed. Evidence is found in favor of PPP when wholesale prices are used but not when consumer prices are utilized; whereas, in all but one case, it is not possible to reject the symmetry and proportionality hypotheses. Furthermore, it is shown that the dimension of the cointegration space may exhibit sample dependency, but the estimated coefficients are stable in recursive estimations. Finally, by implementing the multivariate KPSS test for the null hypothesis of cointegration, Johansen's results are overturned.     

Purchasing Power Parity and aggregation bias for a developing country: The case of Mexico

This paper investigates long-run Purchasing Power Parity (PPP) between the US and Mexico. We use a panel of disaggregated price data between the US and Mexico with a long time series to look at two types of aggregation bias. The first is examined in Imbs et al. — which we refer to as estimator aggregation bias — and the second is put forth by Broda and Weinstein — hereafter, data aggregation bias. The findings indicate substantial estimator aggregation bias and data aggregation bias. Although estimates using aggregate data and imposing homogeneous coefficients provide little evidence of PPP, findings with disaggregated data and heterogeneous coefficient estimators offer strong support. The results also suggest the presence of small-sample bias as examined in Chen and Engel, but with little effect on the qualitative results. Tradable goods and non-tradable goods show little distinction in convergence rates. Estimated half-lives are lower under flexible than fixed exchange rates and indicate rapid convergence during the Mexican peso crisis.     

Purchasing Power Parity in the Transition: The Case of the Romanian Leu Against the Dollar

This article uses co-integration analysis to test purchasing power parity for the Romanian leu against the US dollar. The fact that the purchasing power parity (PPP) hypothesis is not rejected leads to the conclusion that the real appreciation of the leu against the dollar over the transition has not been due to an appreciation of the equilibrium real exchange rate. Rather it is simply the consequence of the leu being devalued beyond the equilibrium level at the start of reform and slowly returning to its constant equilibrium real rate. There is evidence that the adjustment to equilibrium has fallen almost entirely on the price level, so that a major consequence of the excessive undervaluation has been higher inflation.     

The Volatility of Real Exchange Rates: The Australian Case

This paper presents an empirical investigation into factors underlying the real U.S.-Australian dollar exchange rate. We find that the random walk model of the real exchange rate can be improved by various GARCH specifications. In particular, we find that the estimated risk premium from a GARCH-M model is not robust to model specification. When the model is extended to include the $US/Yen real exchange rate and an index of commodity prices the GARCH-in-mean term is no longer significant. The additional variables seem to account for the increased volatility of the real exchange rate in the post-1983 period. Somewhat surprisingly, we find that changes in the Australian term spread and US-Australian interest rate differential have little or no explanatory power for the real exchange rate.     

Testing for Long Run Purchasing Power Parity: An Examination of Korean Won

My small-scale macroeconomic model of the Taiwanese economy contains behavioral equations to explain saving, investment, the rate of economic growth, export demand, export supply, and import demand. Exploiting the two definitions of the current account (national saving ? omestic investment and export + net factor income from abroad ? imports), the in-sample dynamic simulation tracks the current account remarkably well. If the Taiwanese government pursued deliberate policies to reduce the current account surplus, this model indicates that the effects on the economy would depend critically on whether the current account surplus was eliminated by reducing national saving or by raising domestic investment. [430]     

Product Variety and Real Exchange Rates: The Balassa-Samuelson Model Reconsidered

This paper introduces product variety into the Balassa-Samuelson model in order to extend the model of real exchange rate determination. With product differentiation, real exchange rates depend not only on the relative price of nontradables to tradables but also on relative prices among tradables. This paper identifies a new factor that determines the extent of variety, termed Infrastructural Technology, and that affects real exchange rates not through the relative price of nontradables but through relative prices among tradables. This paper also conducts empirical tests, and the results of these tests support the model. Received May 31, 2001; revised version received March 20, 2002 Published online: April 30, 2003     

国际购买力平价和简化净出口函数:中国实证

文章从国际交换价值的角度研究了一价定律的内涵,提出了国际购买力平价理论,并且证明了国际购买力平价是严格意义上的均衡汇率。2009年人民币贸易品购买力平价为6.70元人民币/美元,而国际购买力为5.49元人民币/美元,后者可作为确定人民币汇率处于均衡水平的参考。文章还简化了净出口函数,得出如下主要结论:(1)近年我国的贸易顺差大幅增长,主要是因为价格贸易条件恶化,其次是因为J曲线效应;(2)当前的首要任务是改善我国的价格贸易条件以提高国际购买力平价,而不是调整人民币汇率。     

Breaking Trend Functions in Real Exchange Rates: Evidence from Seventeen OECD Countries

This paper tests for unit roots in dollar-based and DM-based real exchange rates using quarterly data (from 1957:i to 1995:iv) for seventeen OECD countries. The results show that the unit root hypothesis cannot be rejected even if allowance is made for the possibility of a one-time change in the mean of the series at an unknown point in time. This is evidence against the hypothesis of absolute long-run purchasing power parity over this period.     

Current Account Imbalances and Real Exchange Rates in the Euro Area*

Global current account imbalances have been one of the focal points of interest for policymakers during the last few years. Less attention has been paid, however, to the diverging current account balances of the individual euro area countries. In this paper we consider the dynamics of current account adjustment and the role of real exchange rates in current account determination in the EMU countries. After controlling for the effects of income growth, we find the relationship between real exchange rates and current accounts to be substantial in size and subject to nonlinear effects. We find that real exchange rates can offer further insights, beyond the effects of the income catch‐up process, relevant to current account determination in the EMU.     

A Comparison of Purchasing Power Parity between the Pound Sterling and the Australian Dollar in 1979*

This paper attempts to compare the cost of living in Australia and the United Kingdom. The comparisons are made on the basis of price and expenditure shares information provided predominantly by the Australian Bureau of Statistics and the Department of Employment, London, and from a private survey conducted by one of the authors in London and Sydney in December 1979. Due to the nature of the data, absence of quantity information, it was necessary to employ a new index number method derived by one of the authors.