关于汇率理论与汇率政策研究的思考

汇率的决定与外汇市场供求、经常账户平衡、央行货币政策、相关资产价格、经济基本面、国民收入及国际收支账户等有着直接的或间接的关系。完善人民币汇率形成机制,要从外汇市场拓展到本外币政策深层次协调,从涉外经济拓展到内外经济协调发展,同时在新的汇率形成机制下对国际货币体系和主要货币的变化趋势进行系统的监测预测和分析研究。     

货币政策冲击、外汇干预与汇率 变动的同期与动态关联研究

本文采用SVAR模型以及2005年7月至2011年12月的月度数据，研究了2005年的新汇率改革之后，我国货币政策冲击、外汇干预与汇率间的动态关联。主要发现与结论如下：在货币政策冲击、外汇干预与汇率三者的同期博弈中，外汇干预不能即刻影响同期汇率。利率的上升及广义货币供应量的变动均会对同期名义有效汇率造成一定影响，但不太显著。在三者的动态博弈中，外汇干预是非冲销和有效性得到验证，外汇干预信号的假设可以成立。此外，即使利率的变动并不针对汇率，却带来汇率的大幅波动。名义有效汇率的上升可以有效抑制消费价格指数（CPI）的提高，并且数量型货币政策容易造成CPI的反弹。本文针对研究结论提出了一些政策建议。     

实际汇率变动对商品国内价格的影响研究

本文从理论与实证两方面对实际汇率以及汇率波动性的变动对中国出口商品国内价格的影响进行了研究。理论分析强调了汇率对出口商品国内价格的影响方向取决于商品的需求价格弹性。对我国1990—2002年共12种商品平行数据的实证分析说明了汇率波动性增加可能导致部分初级产品国内价格水平的下降。全文分析强调了实际汇率波动性对国内商品价格的影响。     

真实汇率与真实利率差异-基于人民币真实汇率的实证研究

本文详细考察了人民币对美元、日元、港币和欧元的双边真实汇率、真实利率差异与进出口之间的统计关系,结果发现:(1)人民币真实汇率与真实利率差异间不存在显著且稳定的统计关系;(2)人民币真实汇率具有较强的"自回归"性,并且存在比较明显的非线性动态调整特征。因此,研究人民币真实汇率自身的特定生成机制可能更具有重要意义。     

EXCHANGE RATE MANIPULATION AND CONSTRUCTIVE AMBIGUITY

I consider dynamic models in which investors are heterogeneously informed about both foreign exchange interventions and exchange rate fundamentals and show that transparency sometimes exacerbates misalignment between the exchange rate and fundamentals. Although transparency reveals information about fundamentals, it also increases the precision of the exchange rate as a signal of those fundamentals that remain unknown (the signal‐precision effect of transparency). If a central bank announcement reveals little information about fundamentals, then this effect dominates and transparency magnifies misalignment. One implication is that ambiguity can increase the effectiveness of intervention to support a declining currency during times of crisis.     

REAL EXCHANGE RATE CYCLES AROUND ELECTIONS

We develop the implications of devaluation cycles for real exchange rates in a two-sector small open economy with a cash-in-advance constraint. Policy-makers are office-motivated politicians. Voters have incomplete information on the competence and the opportunism of incumbents. Devaluation acts like a tax, and is politically costly because it can signal the government is incompetent. This provides incumbents an incentive to postpone devaluations, and can lead to an overvalued exchange rate before elections. We compare the implied cycle of appreciated/depreciated exchange rates with empirical evidence around elections from Latin America.     

UNIFICATION OF CHINA'S FOREIGN EXCHANGE RATES

This paper studies China's foreign exchange market before and after the 1994 unification of the official and swap exchange rates. Examining segmentation as well as linkages among the foreign exchange adjustment centers (FEACs) reveals that the linkages were not strong enough to eliminate or narrow price differentials among FEACs. Hence, improving the foreign exchange market's efficiency requires a reform to unify the swap rates. This paper discusses the unification's implications for inflation, monetary policy, and current account convertibility.     

ELECTIONS AND EXCHANGE RATE POLICY CYCLES

This paper presents a theoretical model based on the distributive effects of real exchange rate (RER) changes that generates RER electoral cycles of the type identified in Latin American countries: more appreciated RER before elections and more depreciated after elections. Typically, a RER depreciation favors exporters and import-competing domestic industries, to the detriment of consumers. These RER cycles are generated by imperfect information on policy-makers' preferences, which are concealed from voters with the help of an unstable macroeconomic environment. Exchange rate cycles result from the interplay between the electoral power of the non-tradable sector and the tradable sector's ability to lobby the government.     

APPLICATIONS OF REAL EXCHANGE RATE ANALYSIS

This paper presents an approach for analyzing changes in the real exchange rate. It cites three views of the real exchange rate and outlines the complex forces that cause the rate to change. Using data from the International Monetary Fund's International Financial Statistics, the analysis then focuses on selected countries, each chosen because its experience reflects the operation of a principal force affecting the exchange rate. A summary of the experience of several countries during the 1970–1983 period illustrates the importance of the real exchange rate in the wake of inflationary episodes, oil crises, massive capital movements, and debt crises during that period. The analysis directs particular attention toward the central role that real exchange rate movements have played in the international debt crisis.     

MODELLING ASYMMETRIC EXCHANGE RATE DEPENDENCE*

We test for asymmetry in a model of the dependence between the Deutsche mark and the yen, in the sense that a different degree of correlation is exhibited during joint appreciations against the U.S. dollar versus during joint depreciations. We consider an extension of the theory of copulas to allow for conditioning variables, and employ it to construct flexible models of the conditional dependence structure of these exchange rates. We find evidence that the mark–dollar and yen–dollar exchange rates are more correlated when they are depreciating against the dollar than when they are appreciating.