Real and nominal shocks in a two-country price-setting world

This paper develops a two-country model in which the law of one price does not hold in the short run, and which is consistent with the stylized fact that exchange rates respond more quickly to ‘news’ than prices. This is done by assuming that firms face lumpy information costs in determining what price to charge. Both domestic and imported goods prices are therefore sticky with respect to ‘news’, and deviations from the law of one price (PPP) are due to exchange rate surprises. The model is used to analyze the domestic and international impact of real and nominal disturbances.     

Linkage between consumer price index and purchasing power parity: Theoretic and empirical study

Price measurement is always important in the economic analysis. Both the consumer price index (CPI) and purchasing power parity (PPP) belong to the scope of price statistics, and the former is a temporal price index, while the latter is a spatial price index. Consumer price survey accounts for more than 70% in the coverage of the international comparison program (ICP), constituting the main part of the catalog of ICP specifications. The similar calculation method, data investigation, and compilation process also suggest that there should be an intrinsic linkage between CPI and PPP. On this basis, an approximate quantity equation is derived for them in terms of price measurement. The empirical analysis with a sample of 178 economies ranging from 2000 to 2013 found that the CPI and PPP are positive correlated significantly, and there is a long-term equilibrium relationship between them. In short run, the CPI may lead to a deviation from the equilibrium state of PPP, but the error correction mechanism makes this deviation come back gradually. Meanwhile, PPP has a price pass-through effect on CPI. The inherent relationship between CPI and PPP provides support for the integration of the CPI statistical system and the global ICP project.     

Dissecting the PPP puzzle: the unconventional roles of nominal exchange rate and price adjustments

The conventional view, as expounded by sticky-price models, is that price adjustment determines the PPP reversion rate. This study examines the mechanism by which PPP deviations are corrected. Nominal exchange rate adjustment, not price adjustment, is shown to be the key engine governing the speed of PPP convergence. Moreover, nominal exchange rates are found to converge much more slowly than prices. With the reversion being driven primarily by nominal exchange rates, real exchange rates also revert at a slower rate than prices, as identified by the PPP puzzle [J. Econ. Lit. 34 (1996) 647].     

The Relationship between Exchange Rates and Interest Rate Differentials: A Wavelet Approach

This paper uses wavelet analysis to investigate the relationship between the spot exchange rate and interest rate differential for seven pairs of countries, with a small country, Sweden, included in each case. The key empirical results show that there tends to be a negative relationship between the spot exchange rate (domestic‐currency price of foreign currency) and nominal interest rate differential (approximately the domestic interest rate minus the foreign interest rate) at the shortest timescales, while a positive relationship is more frequently found at the longest timescales. This indicates that among models of exchange rate determination using the asset approach, the sticky‐price models are supported in the short run and flexible‐price models in the long run.     

Inflation and exchange rates: Evidence and policy guidelines for the European community

The paper, which is a summary of the so-called OPTICA-report, sponsored by the Commission of the European Communities, argues that changes in the exchange rates of EC member currencies during the period between the early 1960s and the mid-1970s predominantly reflect inflation differentials. The correspondence is sufficiently close, when wholesale price indices are used to express national inflation rates and PPP is measured in terms of effective exchange and inflation rates, to justify a PPP-based intervention rule as the main criterion for managing the individually or jointly floating EC-currencies.     

Market integration and contagion: Evidence from Asian emerging stock and foreign exchange markets

This paper examines whether Asian emerging stock markets (India, Korea, Malaysia, Philippines, Taiwan, and Thailand) have become integrated into world capital markets since their official liberalization dates by estimating and testing a dynamic integrated international capital asset pricing model (ICAPM) in the absence of purchasing power parity (PPP) using an asymmetric multivariate GARCH(1,1)-in-Mean approach. Also examined in this paper is whether there are pure contagion effects between stock and foreign exchange markets for each Asian country during the 1997 Asian crisis. The empirical results show that first, both currency and world market risks are priced and time-varying, suggesting that an international asset pricing model under PPP and constant price of risk might give rise to model misspecification. Second, the stock markets for India, Korea, Malaysia, Philippines, and Thailand were segmented from the world capital markets before their liberalization dates, but all six markets have become fully integrated since then. Third, the market liberalization has reduced the cost of capital and price volatility for most of the countries. Finally, as for the contagion effects, strong positive impact of return shocks originating from the domestic stock market to its foreign exchange market during the crisis is found. This dynamic relationship between stock market and foreign exchange market is consistent with stock-oriented exchange rate models.     

人民币汇率购买力平价假说的实证检验

从长期来看,购买力平价对人民币汇率虽然具有一定的解释作用,但有很大的局限性。汇率的变动不仅仅与物价水平相关,还与一国的生产力发展水平、利率、资本流动等其他经济变量以及该国施行的货币政策、财政政策和汇率政策有关。因此,必须对购买力平价计量检验模型进行修正,以期更好地解释人民币汇率的变化并指导其调整。     

人民币升值对出口商品价格传递效应的测度及其政策涵义——以中美贸易为例

以单位值指数构造方法为基础,选取五种商品分别构建五个不同行业商品的出口价格指数,经过协整检验、自回归分布滞后检验以及脉冲响应函数检验,结果发现:五种行业出口产品的价格指数在短期内均存在不完全的汇率传递效应;相对于其他行业来说,劳动密集型行业的汇率的短期出口价格效应更加明显;汇率传递的长期出口价格效应要高于短期出口价格效应。其政策涵义是,为规避人民币升值的负面效应,中国应该积极推动全球化过程中贸易自由化进程,做好劳动密集型行业的升级和优化,稳步推进人民币汇率形成机制和管理体制改革,宏观政策做到微观审慎监管和宏观审慎监管相结合。     

Before the fall: were East Asian currencies overvalued?

Two major approaches to identifying the equilibrium exchange rate are implemented. First, the concept of purchasing power parity (PPP) is tested and used to define the equilibrium real exchange rate for the Hong Kong dollar, Indonesian rupiah, Korean won, Malaysian ringgit, Philippine peso, Singapore dollar, New Taiwanese dollar and the Thai baht. The calculated PPP rates are then used to evaluate whether these seven East Asian currencies were overvalued. A variety of econometric techniques and price deflators are used. As of May 1997, the HK$, baht, ringgit and peso were overvalued according to this criterion. The evidence is mixed regarding the Indonesian rupiah and NT$. Second, a monetary model of exchange rates, augmented by a proxy variable for productivity trends, is estimated for five currencies. An overvaluation for the rupiah and baht is indicated, although only in the latter case is the overvaluation substantial (17%). The won, Singapore dollar and especially the NT$ appear undervalued according to these models.     

Panel analysis of the monetary approach to exchange rates: Evidence from ten new EU members and Turkey

This paper presents empirical evidence which links the exchange rates to monetary variables in the newly entered ten EU members and Turkey. Using the panel version of various cointegration tests, we find a long-run relationship between nominal exchange rate and monetary variables such as monetary differential, output differential, interest rate differential and price differential. In addition, empirical evidence shows that our error-correction framework of the out-of-sample predictability outperforms random walk after two years.     

A Systematic Review on the Effects of Personalized Price Promotions for Food Products

Recent decades have witnessed the increasing adoption of personalized price promotion (PPP) at grocery stores. Despite the growing body of research debating whether PPP is more effective than untargeted price promotions, there is no literature synthesizing the relevant evidence on food products. Therefore, we conduct a systematic review to examine empirical findings on the effects of PPP targeting food products. Outcomes of 12 identified studies demonstrate larger sales and profit boosting effects of PPP than its non-personalized counterparts. Meanwhile, the results on how this approach influences consumer behavior are mixed. The effectiveness of PPP varies among different targeting strategies (e.g. reward or cross-selling) and information collection methods (e.g. using within- or across-chain data). The findings of this review have important managerial implications for the future evaluation and application of PPP as well as imply potential directions of further research on this topic.     

石油净进口大国利率与油价对净出口的影响

传统贸易理论在研究影响一国净出口因素时只考虑了汇率和收入水平,本文在此基础上加入了利率和油价因素,并以美、中、日三个石油净进口大国为例进行了实证分析,结果表明利率上升减少投资需求,降低国内物价水平,增强出口商品价格竞争力,使出口增加,进口减少;油价上涨,石油进口支出增加,一国进口总额增加。实证和理论分析结果基本相符,即净出口与利率呈正向关系,与油价呈负向关系。     

Do fluctuations in crude oil prices have symmetric or asymmetric effects on the real exchange rate? Empirical evidence from Indonesia

Current research on the oil price impacts on exchange rates typically relies on the assumption that fluctuations in crude oil prices have symmetric impacts on a country's real exchange rate. Thus, the contribution of the paper is to use the non‐linear autoregressive distributed lag (ARDL) method of Shin, Yu, and Greenwood‐Nimmo (2014) and examine whether crude oil prices are asymmetrically passed on to the real exchange rate in the case of Indonesia. We uncover that oil price changes indeed asymmetrically affect the Indonesian rupiah in both the long and short run; i.e., the movement in the Indonesian rupiah appears to be more responsive to rising oil prices than to declining oil prices.     

An Empirical Analysis of the Determinants of Interest Rates in Ghana

ABSTRACT

This paper provides an empirical analysis of the determinants of the bank lending rate in Ghana using annual time series data from 1970 to 2013. We found evidence of a long-run equilibrium relationship between the average lending rate charged by commercial banks and its determining factors. In the long run, bank lending rates in Ghana are positively influenced by nominal exchange rates and Bank of Ghana’s monetary policy rate but negatively with fiscal deficit, real GDP and inflation. We also find positive dependence of the bank lending rate on exchange rates, and the monetary policy rate both in the short and long run. Specifically, our findings reveal that the Bank of Ghana’s monetary policy rate and the exchange rate, by far, show strong contemporaneous effects on the average bank lending rate in Ghana.     

Intermediate imports, the terms of trade, and the dynamics of the exchange rate and current account

This paper studies the macroeconomic effects of an increase in the price of an imported intermediate production input. The framework of the analysis is a small open economy with a floating exchange rate and endogenous terms of trade, in which saving depends on residents' (variable) rate of time preference. Contrary to popular conceptions, an intermediate price shock may lead to an appreciation of the exchange rate in both the short run and the long run, and is likely to occasion a current-account surplus. The terms of trade between foreign and domestic finished goods always improve in the long run.     

Purchasing power parity under fixed and flexible exchange rates

The relationship between exchange rates and relative price levels in a sample of fourteen countries is studied for periods of fixed and of floating exchange rates. In comparing the deviations of the exchange rates from their purchasing power parity levels in the two cases it turns out that both the average size of the divergencies and their duration are smaller under the fixed rate period 1957–1966 than under the recent period of floating rates. The adjustable beg years of the late sixties fall in between. Evidence is also found which indicates a bias in purchasing power parity calculations using consumer price indexes, and the hypothesis that purchasing power parity relationships shifted as a result of changes in relative prices occuring at the end of 1973 cannot be rejected. The findings are related to the empirical literature on the international transmission of inflation and to recent comparisons of exchange rates and relative inflation rates.     

Real exchange rate targeting and macroeconomic instability

Using an optimizing model of a small open economy, this paper studies the macroeconomic effects of PPP rules whereby the government increases the devaluation rate when the real exchange rate—defined as the price of tradables in terms of nontradables—is below its long-run level and reduces the devaluation rate when the real exchange rate is above its long-run level. The paper shows that the mere existence of such a rule can generate aggregate instability due to self-fulfilling expectations. The result is shown to obtain in both flexible- and sluggish-price environments.     

Central Bank Intervention,Exchange Rate Regime and the Purchasing Power Parity

Motivated by the argument that central bank intervention leads to non‐linear exchange rate adjustment processes, we examine purchase power parity (PPP) by applying quantile unit root tests to the exchange rates of the New Taiwan Dollar (NTD) vis‐à‐vis seven Asian currencies. We show that exchange rate regime matters in determining whether PPP holds. While PPP holds overwhelmingly during the period when the NTD is under the fixed exchange rate regime, it is present only for some exchange rates during the managed floating rate regime. For exchange rates exhibiting mean reversion, the reversion occurs mainly when the shocks are large. In contrast to conclusion in the literature, our test results show little evidence of asymmetric mean reversion between positive and negative shocks.     

能源约束对出口贸易结构影响的实证分析

本文从能源价格的角度出发,在定义能源约束量化指标的基础上,建立了能源约束对出口贸易结构影响的动态计量模型,并从长期和短期两个角度,分析了能源约束对出口贸易结构的动态影响。研究结果表明,从短期看,能源约束通过直接的价格冲击和间接的生产要素部门转移,带动贸易结构的优化调整;从长期看,能源约束对出口贸易结构的调整方向具有不确定。     

Exchange rate determination: The role of factor price rigidities and nontradeables

This paper introduces factor (labor) markets into the intertemporal monetary model of Obstfeld and Rogoff and combines this richer market structure with a new utility-independent representation of nontradeables. This allows us to explore the international monetary transmission mechanism for factor price (wage) rigidities under different degrees of macroeconomic openness. Factor price rigidities imply similar properties for the international transmission mechanism as domestic producer price rigidities. Nontradeables give raise to interesting new effects under asymmetric monetary shocks: They create short-run PPP deviations, increase exchange rate volatility relative to price level volatility and reduce (positive) consumption and (negative) output comovements.