Trade integration, competition, and the decline in exchange-rate pass-through

Over the past 20 years, U.S. import prices have become less responsive to the exchange rate. We propose that a significant portion of this decline is a result of increased trade integration. To illustrate this effect, we develop an open economy DGE model featuring demand curves with variable elasticities so that a firm's pricing decision depends on its competitors’ prices. As a result, a foreign exporter finds it optimal to vary its markup in response to shocks that change the exchange rate, insulating import prices from exchange rate movements. With increased trade integration, exporters have become more responsive to the prices of their competitors, explaining a sizeable portion of the observed decline in the sensitivity of U.S import prices to the exchange rate.     

人民币汇率对国内价格的传导机制研究

本文构建了我国进口价格、消费者价格与各相关因素的长期均衡模型。通过实证研究发现：长期内汇率、国际初级商品价格波动是影响我国进口价格指数的显著因素,但其对国内消费者价格的影响并不明显;同时国内需求和货币供应量波动对消费者价格的影响也不显著。从方差分解结果来看,国内消费者价格的上涨更多来自CPI自身的粘性。分段分析结果表明,汇改后人民币有效汇率波动对国内进口价格和消费者价格的传递效率有所提高,汇率工具在宏观经济中的调节作用逐步增强。     

贸易摩擦、宏观经济波动与经济开放程度的选择

本文构建一个包含关税冲击以及外汇风险溢价的两国开放经济DSGE模型,创新地揭示了关税冲击造成实际汇率波动的“直接效应”与“间接效应”,刻画了关税变动、贸易条件与实际汇率之间的动态关系与作用机制。我们深入分析了不同经济开放程度下贸易摩擦造成的宏观经济波动以及经济福利损失。模拟结果表明,在一定贸易开放程度下,外国加收关税一方面会导致本国贸易条件恶化,引发出口及产出下降;另一方面会导致本国汇率贬值,引发出口及产出增长。关税冲击发生后短期中汇率贬值效应占优,本国产出会出现小幅上升,随后贸易条件恶化效应逐步显现,产出持续下降。福利分析结果表明,本国适度提升贸易开放度,虽然经济福利损失会小幅上升,但福利损失增加幅度小于外国,会在贸易摩擦竞争中形成相对优势;如果本国过度提高贸易开放度,则会导致本国福利损失大幅增加,并且大于外国福利损失增幅,会在贸易摩擦竞争中形成相对劣势。因此,应适度逐步有序地提升贸易开放度。此外,本国适度推进资本账户开放的政策能够改善贸易条件,促进本国经济增长。     

贸易摩擦、宏观经济波动与经济开放程度的选择

本文构建一个包含关税冲击以及外汇风险溢价的两国开放经济DSGE模型,创新地揭示了关税冲击造成实际汇率波动的“直接效应”与“间接效应”,刻画了关税变动、贸易条件与实际汇率之间的动态关系与作用机制。我们深入分析了不同经济开放程度下贸易摩擦造成的宏观经济波动以及经济福利损失。模拟结果表明,在一定贸易开放程度下,外国加收关税一方面会导致本国贸易条件恶化,引发出口及产出下降;另一方面会导致本国汇率贬值,引发出口及产出增长。关税冲击发生后短期中汇率贬值效应占优,本国产出会出现小幅上升,随后贸易条件恶化效应逐步显现,产出持续下降。福利分析结果表明,本国适度提升贸易开放度,虽然经济福利损失会小幅上升,但福利损失增加幅度小于外国,会在贸易摩擦竞争中形成相对优势;如果本国过度提高贸易开放度,则会导致本国福利损失大幅增加,并且大于外国福利损失增幅,会在贸易摩擦竞争中形成相对劣势。因此,应适度逐步有序地提升贸易开放度。此外,本国适度推进资本账户开放的政策能够改善贸易条件,促进本国经济增长。     

Regional Effects of Exchange Rate Fluctuations

We exploit differences across U.S. states' exposure to trade to study the effects of changes in the exchange rate on economic activity. Across states, trade-weighted exchange rate depreciations are associated with increased state exports, reduced state unemployment, and higher state hours worked. The effects are particularly strong during periods of economic slack. A multiregion model with interstate trade and labor flows, calibrated to match state-level trade data and migration flows, replicates the empirical relationship between exchange rates and unemployment. The high degree of interstate trade plays an important role in transmitting shocks across states in the first year, whereas interstate migration shapes cross-sectional patterns in later years. We use the model to study the regional effects of tariffs in the United States. The model suggests that a 25% Chinese import tariff on U.S. goods would be felt throughout the United States, even in states with small direct linkages to China, raising unemployment rates by 0.2 to 0.7 percentage points in the short run.     

The Costs of Restrictive Trade Policies in the Presence of Factor Tax Distortions

This paper uses a numerical general equilibrium model to examine the quantitative importance of pre-existing factor tax distortions for the welfare effects of tariffs and import quotas. The presence of pre-existing taxes can greatly raise the costs of these policies, possibly by over several hundred percent. For a tariff much of this extra cost can be offset if tariff revenues are used to reduce distortionary taxes. Hence there can be a large cost discrepancy between tariffs and quotas. The optimal tariff for a country with market power in trade can be reduced to zero, unless revenues finance cuts in distortionary taxes.     

基于SVECM的我国经济增长动态效应的实证研究

本文应用结构向量误差修正模型(SVECM),实证分析1990-2008年我国投资、消费、进出口对经济增长的动态效应.实证结果显示:消费对经济的短期和长期冲击均高于投资和进出口,消费对投资冲击大于投资对消费冲击,消费和投资未产生相互挤出效应;经济波动以消费为主,世界经济波动对我国经济波动显著增强.     

人民币汇率波动与中日贸易

金融危机使人民币汇率存在着较大的不确定性和波动性,对中日贸易产生着重要影响。通过建立中日贸易模型的实证研究,结果表明中国对日出口收入效应较强,从日进口收入效应较弱;对日出口价格效应极强,从日进口价格效应较弱;对日出口汇率波动效应较强,从日进口汇率波动效应不存在。因此,若人民币持续升值,汇率波动日益增强,中国经济将会受到严重冲击。故中国政府应暂缓人民币升值,放缓人民币汇率形成机制改革的步伐。     

Effective protection and exchange-rate determination

Considerable research interest has entered on the implications for exchange-rate determination of fluctuations in intermediate goods prices ang changes in tariff protection. This paper draws together the strands of this literature by examining the role of effective protection in exchange rate determination. A disaggregated portfolio balance model of the open economy is used to analyze the determination of real and nominal exchange rates in the presence of rational expectations. Additionally, it is used to explore the implications for resource allocation of changes in the effective rate of protection in a country capable of influencing its terms of trade.     

The effects of foreign disturbances under flexible exchange rates

Foreign fiscal expansion has a contractionary, and monetary expansion an expansionary, effect on the small economy in the real wage model. The reverse conclusions hold in the money wage model only if the income elasticity of the demand for money is one or greater. The same results hold also for the stationay state effects. This theory provides an explanation—in the policy mix of the United States—for the recent lacklustre performance of Europe. Under rational expectations, foreign monetary expansion leads to an overshooting appreciation, fiscal expansion leading to several possible exchange rate responses. The new results are produced by consistently specified money demand and import functions, the supply side, and the wealth effect.     

人民币名义有效汇率对进口价格的传递效应研究

本文基于一个成本加成模型,实证分析了人民币名义有效汇率对进口价格的传递效应。结果表明,1995年第一季度到2007年第二季度期间,人民币名义有效汇率的进口价格传递是不完全的:汇率若升值1%,短期内进口价格下降约0.26个百分点,长期下降0.25—0.29个百分点。利用滚动回归方法发现1995至2007年期间汇率对进口价格的传递程度呈先下降后上升的趋势。进一步检验表明,人民币名义有效汇率对进口价格的传递一定程度上内生于国内通货膨胀环境,同时也可能和进口产品结构的演变有关。     

贸易保护对汇率的影响——基于资本流动性及汇率收敛视角

对资本开放程度及汇率收敛度进行分类的框架下,考察贸易保护对汇率的影响。研究发现：在不同分类的国家,同样提升关税,对名义汇率的影响不尽相同;在汇率收敛的国家,提升关税会伴随资本控制程度降低而会导致名义汇率升值;在汇率不收敛情况下,提升关税会伴随资本控制程度降低而导致名义汇率贬值;从升值角度向绝对收敛状态转移时,低资本控制度及汇率收敛使汇率收敛度越接近于绝对收敛,在关税上升情况下会加剧名义汇率升值。使用动态系统GMM模型对66个国家2000-2014年样本数据进行实证分析,有力支撑了理论分析的结果。同时,对非关税措施进行实证分析,得出一般情况下贸易保护政策的确会造成汇率的升值,该结果在一般情况下是稳健的。     

Monetary shocks, the exchange rate, and the trade balance

This paper investigates the response of the exchange rate and the trade balance to monetary policy innovations for the US economy during the period 1973:01–1993:12. The empirical findings indicate that contractionary monetary policy shocks lead to transitory appreciations of the real and the nominal exchange rate. Exchange rate appreciations that are caused by a temporary contractionary shock to monetary policy are correlated with a short-lived improvement in the trade balance which is then followed by a deterioration, giving support to the J-curve hypothesis.     

Behind the scenes of abandoning a fixed exchange rate regime

This paper explores the process of abandoning a fixed exchange rate regime during sudden stops in a small open economy. The Bank of Korea’s exchange rate policy reports during the East Asian crisis suggest that its fixed exchange rate regime was forced to collapse due to the depletion of usable foreign reserves, which resulted from the credit policy of the Korean central bank to support domestic banks in need of foreign currency liquidity. To capture the Korean crisis experience, I build a quantitative small open economy model in which, in response to the country risk premium shock, the foreign-currency credit policy of a central bank under fixed regime leads to the exhaustion of international reserves and consequent exchange rate regime shift. This model does well at replicating the observed contraction in Korean aggregate variables.     

Land-releasing policy and welfare in a dual economy

This article examines a variety of impacts of the policy of releasing public land for agricultural in the Harris-Todaro economy for the short run as well as the long run. We contrast the effects for the economy under import quotas versus tariffs. Our analysis suggests that the land-grant policy in the presence of a tariff is effective in promoting welfare for both the short run and the long run. However, the policy in the presence of an import quota may not be effective in the long run.     

人民币汇率变动对中国进口商品价格传递效应的实证研究

通过选取国民经济的24个重点行业,使用从2009~2013年的共60个月度数据为研究样本,采用ADL 模型,对汇率变动对按国民经济分类行业的进口价格的传递弹性系数进行实证研究。结果表明：从长期来看,我国人民币汇率变动与进口价格存在着负相关关系,不同行业和产品的传递弹性存在着较大差异。     

Inflationary finance in an open economy

Models of inflationary finance that consider trade and capital flows generally conclude that openness curtails the ability of governments to impose the inflation tax due to currency substitution. This paper models two channels that allow central banks to increase inflation tax revenue by opening the economy. First, central banks can open the capital account subject to a reserve requirement on capital inflows. Revenue maximization produces a smaller reserve requirement on foreign capital inflows that on domestic deposits. Second, central banks can impose prior import deposits to broaden the monetary base in order to use the inflation tax on imports as an alternative to tariff revenue.     

The optimal currency basket under vertical trade

This paper explores the theory of optimal currency basket in a small open economy general equilibrium model with sticky prices. In contrast to existing literature, we focus on an economy with vertical trade, where the currencies in the basket may play different roles in invoicing trade flow. In a simple two-currency basket, one currency is used to invoice imported intermediate goods and is called “import currency”, while the other currency is used to invoice exported finished goods and is called “export currency”. We find that the optimal weights of the import currency and the export currency depends critically on the structure of vertical trade. Moreover, if a country decides to choose a single-currency peg, the choice of pegging currency also depends on how other competing economies respond to external exchange rate fluctuations.     

Intertemporal price speculation and the optimal current-account deficit

The paper studies the effects of terms-of-trade fluctuations in an infinite-horizon optimizing model of a small, open economy. While the current-account response to a transitory terms-of-trade shock is in part explicable by intertemporal smoothing, an important additional factor is the effect of anticipated future terms-of-trade shifts on the ral value of the external debt in terms of the home consumption basket. When foreign borrowing is indexed to the import good, a temporary worsening of the terms of trade creates the expectation of a decline in the real value of external debt. This fall in the relevant real interest rate leads households to increase consumption while export prices are low and to decrease consumption sharply once the terms of trade recover. If an adverse price shock is of sufficiently brief duration, instantaneous utility will rise initially.     

Asset price dynamics,inflation and sectoral composition of output: a dependent economy model

This article develops a dependent economy model that focuses on the interactions between inflation and asset price dynamics under a flexible exchange rate and rational expectation. We assume that money wage adjusts instantaneously to clear the labour market. The asset prices are represented by the Tobin’s q and exchange rate. Using this framework, we will examine implications of monetary policy, fiscal policy, tariff liberalization and exogenous capital flows for inflation and asset prices, which in turn determine the allocation of labour and the sectoral composition of output. The effects of different exogenous and policy-induced shocks critically depend on the difference in the speeds of adjustment in commodity price and asset prices and multiple cross effects generated by changes in these prices.