Nonlinear exchange rate dynamics under stochastic official intervention

Many studies employ non-linear models to explain or forecast the exchange rate and find their superiority. This article builds an exchange rate model of managed float under conditional official intervention. In the model, the government minimizes social loss through a trade-off between targeting the exchange rate and lowering intervention costs. We obtain an endogenous threshold model and derive an analytical solution of the exchange rate stochastic interventions. The implication of a managed float causing a lower volatility of the exchange rate has been found by past empirical studies. Our model provides not only a justification for the central banks' conditional interventions but also a rationale for the use of regime-switching models of two states (intervention vs. non-intervention) in the empirical studies of exchange rates.     

A Monetary Approach to Exchange Market Disequilibrium in Australia: 1975–97

Under a managed float, the central bank may respond to an exchange market disequilibrium by changing either the international reserves or the exchange rate or both such that neither the reserve changes nor the exchange rate movements convey an unambiguous indication of the nature or extent of the disequilibrium. Girton and Roper (1977) suggested an index, namely the exchange market pressure, to capture the disequilibrium. This paper utilises a similar framework to study the exchange market pressure in Australia during 1975–1997 and reserve transactions. It is found that there were substantial reserve transactions in the face of exchange market pressure even after the switch to the floating rate system and the deregulation of the financial system. As a result of these transactions, sharp fluctuations in the exchange rate were moderated and the actual exchange rate appeared to broadly follow the market equilibrium rate.     

Surviving Asymmetry in Capital Flows and the Business Cycles: The Role of Prudential Capital Controls

Past literature of different strands has pointed to a potential asymmetry: while portfolio capital inflows are largely irrelevant to the economy, capital outflows can cause recession. In a model with a convex investment and portfolio balance adjustment cost, and endogenous credit‐in‐advance constraint, we find that investment is determined solely by opportunity cost of physical capital unrelated to portfolio capital inflows when the constraint is slack. However, once credit availability is tightened up by capital outflows, the negative liquidity constraint dominates the opportunity‐cost factor, causing an economic downturn. Financial fragility against capital outflows is an outcome of pecuniary externalities, which, however, can be moderated by prudential capital controls. Even when exchange rates float freely, capital controls ease the macro‐stabilizing burden of monetary policy, as they help shield the economy from financial instability. Prudential tax on foreign debt is most preferred, and works the best when the exchange rate float is managed.     

Riding the wave: Monetary responses to aid surges in low-income countries

We focus on the management of highly persistent shocks to aid flows in the presence of currency substitution by the domestic private sector. Such shocks have beneficent long-run effects, but when currency substitution is high they can produce dramatic macroeconomic management problems in the short run. What is the appropriate mix of money and exchange rate targeting in such cases, and the role of temporary sterilization? We analyze these and related issues in an intertemporal optimizing model that allows a portion of aid to be devoted to reducing the government's seigniorage requirement. Our results show that a managed float, with little or no sterilization of increases in the monetary base, supports the smooth absorption of the increased aid without incurring higher inflation, higher real interest rates or overshooting of the real exchange rate.     

Overvalued or Undervalued Euroland Entry?

This study addresses the question of the conversion rate upon joining the European Union with respect to the accession countries of Eastern Europe. The article argues in favour of an undervalued exchange rate in order to promote income generation in the new member countries. For this purpose a strategy of managed float is proposed. Countries not having the preconditions to pursue such a strategy should adopt a currency board arrangement.     

Measuring Exchange Market Pressure and Intervention in Interdependent Economies: A Two-Country Model

In this article, operational exchange market pressure and intervention indices are derived for a world composed of two interdependent economies. The model-consistent formulae, which can be calculated from observed data, are obtained by applying general definitions of exchange market pressure and intervention activity to a two-country rational-expectations model. It is demonstrated that the functional forms used to measure exchange market pressure and intervention activity depend on whether intervention is direct or indirect and also on whether foreign exchange reserves are held as currency or in the form of bonds.     

Exchange Rate Policy and Sovereign Spreads in Emerging Market Economies

This paper empirically analyzes the relationship between exchange rate policy and sovereign risk premia in emerging market economies, considering both officially declared regimes and actual exchange rate behavior. The results show that countries that announce a fixed exchange rate regime face lower spreads than countries that announce a floating regime or intermediate flexibility. When the actual exchange rate behavior is considered, this relationship persists between intermediate flexibility and pegs but countries that allow their exchange rates to freely float do not face higher spreads. The difference between the results is due to the fact that many countries deviate from their declared exchange rate policy. The countries that announce a floating regime do not face higher spreads than pegs when they actually allow a high degree of flexibility as they announced. However, intermediate flexibility leads to higher spreads independently of whether this is the announced policy or the actual behavior.     

China as Number One: How about the Renminbi?

Using simulations projecting Chinese economic growth into the future, this paper first examines when China will overtake the USA to become the largest economy. Demographic changes that affect economic growth are taken into consideration in these projections. China is expected to become number one sometime in the mid-2020s, unless its growth rate of gross domestic product per worker declines dramatically, à la the lost decade of Japan. Next, the paper examines whether China becoming the number one economy will mean its currency, the renminbi (RMB), will become the international key currency. According to the basket currency regressions during the period that Chinese currency was gradually appreciating against the US dollar from July 2005 to August 2008, it is shown that the RMB has already acquired a strong influence on the Asian currencies. This shows that the RMB is fast gaining the status of a regional anchor currency for a possible regional joint float. As the Chinese government proceeds with internationalization of its currency, the RMB is expected to gain in the ranking of other aspects of international currency, such as the store of value and the medium of exchange.     

东亚美元本位、浮动恐惧和原罪

概要亚洲金融危机以前 ,包括中国在内的东亚国家———除了日本———都把本国的货币与美元挂钩。为了避免进一步的混乱 ,国际货币基金组织曾建议这些国家的汇率应该进一步自由浮动。可是 ,我们的分析表明 ,到目前为止 ,美元在东亚国家的货币篮子里依然占据绝对比重 ,也就是说 ,东亚国家的汇率制度基本上又回到了危机以前。到 2 0 0 2年 ,每一个东亚国家货币对美元的每日波幅已经非常微小 ,以至于可以忽略不计。同时 ,大多数东亚国家迅速积累了作为“战争基金”的官方外汇储备 ,这预示着汇率稳定将从每日延续到每月和每个季度。从“原罪”(…     

放弃成本、政府偏好与资本控制:一个审慎的机会主义汇率制度选择模型

本文在Obstfeld(1 996)第二代货币危机模型的基础上 ,建立了一个考虑经济结构、供给冲击以及金融风险的多因素汇率制度选择模型 ,以成本分析为工具解释了资本控制、各类成本和政府偏好对均衡的影响以及对汇率制度选择的影响。研究表明 :(1 )资本控制可以通过多种途径对均衡产生影响 ,在一定条件下可以利用资本控制措施使经济避免多重均衡 ;(2 )放弃成本对汇率制度选择发挥关键作用 ;(3 )较大的政府偏好促使政府选择固定汇率制度 ,在放弃成本不足够大的条件下 ,决策者也可以通过提高政府偏好或者实施资本控制措施来保护本国固定汇率制度 ;(4)对人民币现行汇率制度的放弃成本的估计表明 ,当前人民币汇率制度放弃成本正处于中间水平 ,因此有必要增大政府对固定汇率制度的偏好并且对资本帐户实施适度管理以保持人民币汇率的稳定 ,防范金融风险。至于未来人民币汇率波动幅度的扩大、资本项目自由化的进程以及人民币汇率制度何时回归真正的“管理浮动” ,应主要取决于人民币汇率制度放弃成本的有效降低     

Economic policy implications of the implementation of the single European currency

As it is well known, before the next century a single European currency, the Euro, will be introduced and European products will enjoy an extensive market. Economists have focused their attention on analyzing the different costs and benefits derived from the implementation of the single currency. With regard to the benefits of such an implementation, the most important ones are as follows. The introduction of a single currency will encourage internal demand and will help economic agents save transaction costs; labor distribution will improve; there will be less uncertainty in the markets; and, lastly, it will improve economic growth if technical transmission is facilitated. But there are also problems in the implementation of the single European currency. Credit institutions, especially banks and savings banks, will lose their income from the currency exchange process. It must also be considered that the economies will depend on the higher development level of the German economy. The goal of this paper is to analyze the costs and benefits derived from the implementation of a single currency.     

中国货币状况指数的构建及对货币政策效果的验证

货币状况指数是利率和汇率相对于基期变化的加权和,是一个纳入了利率和汇率对货币环境影响的综合指数。考虑到银行信用对中国货币政策实施的特殊作用,本文基于VAR模型对权重的估计,计算了中国货币状况指数;并通过考察货币状况指数与经济增长间的关系,对1990年以来中国货币政策的执行效果进行了验证。结果表明,货币状况指数变化是中国货币环境“松紧”的一个良好指示器,是经济增长波动的葛兰杰原因;中央银行有必要估算并公布中国货币状况指数,以作为政府适时有效地实施宏观调控的一个参考指标,减少货币政策决策的失误。     

New EU member states and the Euro: economic readiness,benefits and costs

All of the new EU member states (NMSs) have made a commitment to adopt the Euro. This essay considers the countries’ economic readiness to adopt the Euro as well as the economic benefits and costs of adoption. Paper applies a method suggested by Bayoumi and Eichengreen (1997) and finds that the changes of real effective exchange rates between the Euro area and the new EU member states follow the pattern predicted by the optimum currency area theory. This finding allows the construction of the readiness for adoption index for every NMS. The tangible benefits (for NMSs) of adoption are also examined in this essay. Analyses suggest that the costs of currency exchange and hedging against the uncertainty in foreign exchange markets account for about 0.08–0.012% of the countries’ GDP. In addition, countries that adopt the Euro might expect lower inflation and interest rates. This essay also examines the possible costs of adoption. These are in the forms of the lost ability to use monetary policy tools and set the level of seigniorage. Analysis suggests that many countries had given up their independence over monetary policy even before the accession to the EU. In addition, bigger NMSs have not used seigniorage as the source of fiscal income. However, they used exchange rate flexibility to depreciate their currencies during the recent crisis.     

Endogenous inflows of speculative capital and the optimal currency appreciation path

Abstract This paper examines the optimal appreciation path of an undervalued currency in the presence of speculative capital inflows that are endogenously affected by the appreciation path. A central bank decides its appreciation policy based on three costs: (i) misalignment costs associated with the gap between the actual and long‐run equilibrium exchange rates, (ii) short‐term adjustment costs due to resource reallocation, and (iii) capital losses due to speculative capital inflows. Our model finds (1) when speculators face no liquidity shocks, the central bank tends to appreciate the currency quickly to discourage speculative capital; (2) when speculators face liquidity shocks, the central bank optimally pre‐commits to a slower appreciation path, and the appreciation takes the longest time when the probability of liquidity shocks takes intermediate values; (3) the central bank tends to appreciate the currency more quickly when it conducts discretionary policy.     

Measuring Exchange Market Pressure and the Degree of Exchange Market Intervention for the Greek Drachma

This paper presents exchange market pressure and intervention indices than can be applied as tools for policy analysis in the case of Greece. A small open economy model is presented that helps to assess Greek exchange rate policy, within a framework characterized for a strong preference to eliminate excessive exchange rate volatility to meet the Maastricht criteria of low inflation and a fixed domestic currency. [F31]     

人民币已进入了长期升值预期的阶段了吗?

近来 ,关于人民币汇率问题的议论成了社会热门话题 ,但却缺少真正从理论或实证方面严肃分析人民币汇率问题的讨论。本文从一个随机的开放经济模型出发 ,探讨了汇率决定的机制 ,基本结论是 ,像中国这样的发展中的国家 ,虽然经济保持长期高增长 ,但因增长的不稳定性与市场风险较大 ,其货币在相当长的时期都存在贬值预期 ,只有在经济增长风险降到一定水平后才可能产生升值预期 ,而目前中国并未达到这一水平。所以 ,目前人民币的升值压力并不是长期的 ,而只是一些利益集团的短期行为     

货币契约、金融功能与经济发展

本文从交换的角度出发,认为货币是一种为了节约交易费用而设计的载有对社会资源支配权的契约。契约的目的是保障货币作为一种有效率的交换媒介,从而降低交易成本。从契约这一视角理解货币可以发现金融系统有三项重要功能:组织社会资源进行生产、调节消费与投资的比例和风险管理。笔者基于金融系统对消费投资比例的调节功能,通过构建模型说明,发展中国家可以通过完善市场机制和金融系统功能,借助市场的力量实现投资与消费的最优比例,从而使经济得到最优的发展。     

The East Asian Dollar Standard, Fear of Floating, and Original Sin

Before the crisis of 1997/98, the East Asian economies—except for Japan but including China—pegged their currencies to the US dollar. To avoid further turmoil, the IMF argues that these currencies should float more freely. However, the authors’ econometric estimations show that the dollar's predominant weight in East Asian currency baskets has returned to its pre‐crisis levels. By 2002, the day‐to‐day volatility of each country's exchange rate against the dollar had again become negligible. Most governments were rapidly accumulating a “war chest” of official dollar reserves, which portends that this exchange rate stabilization will come to extend over months or quarters. From the doctrine of “original sin” applied to emerging‐market economies, the authors argue that this fear of floating is entirely rational from the perspective of each individual country. And their joint pegging to the dollar benefits the East Asian dollar bloc as a whole, although Japan remains an important outlier.     

Development of the banking system under the Estonian currency board

The choice of a suitable exchange rate regime is the subject of numerous discussions in economic literature. Estonia has been successful in achieving economic stabilization and growth and steadily declining inflation. It has one of the highest per capita foreign direct investments in central and eastern Europe. Estonia also has one of the most liberalized economies among all transition countries. An essential element of the success of Estonian economic development is strict exchange rate control. Estonia has adopted a currency board that serves as a signal of commitment to prudent monetary policy and as a guarantee of sound money during the transition period. This paper discusses the experience of operating the currency board, some future prospects of the currency board arrangement, and the development of the banking system in Estonia.     

Mundell Revisited: a Simple Approach to the Costs and Benefits of a Single Currency Area

The paper evaluates the costs and benefits of a single currency area within a unified framework. Conventionally, it is argued that a single currency area carries a welfare loss owing to the sacrifice of exchange rate adjustment in the presence of country‐specific shocks. But in 1973 Mundell argued that a single currency area offers risk‐sharing benefits when capital markets are limited in their ability to facilitate consumption insurance. The authors construct a simple model and compare a system of independent national currencies to a single currency area. The presence of country‐specific shocks may either reduce or enhance the benefits of a single currency area, depending on the importance of exchange rate adjustment relative to risk‐sharing. In a simple quantitative analysis, we find that either regime may dominate, although the utility differences between the two regimes are very small.