加征关税如何影响美国贸易逆差及全球福利——基于美元本位下两国动态一般均衡框架的分析

本文构建了一个包含美元本位特征的两国模型,在此基础上分析了美国加征关税及引发的贸易摩擦对美国贸易逆差和全球福利的影响,并详细探讨了相关传导机制。在基准模型设定下,美国单方面加征20%关税会使得美国贸易逆差占GDP比重小幅缩小约0.40个百分点,美国长期稳态GDP下降约2.50%,其他国家GDP下降约1.10%,美国居民福利上升约0.60%,其他国家居民福利下降约1.20%。美国单方面加征关税在抑制全球贸易和生产的同时,会通过更加不公平的国际贸易恶化全球福利分配。当其他国家采取报复性措施时,其他国家自身福利并不会进一步恶化,但美国福利会大幅下滑,同时美国贸易逆差相对规模变化不大。贸易摩擦博弈的“囚徒困境”特征在一定程度上能够解释贸易战的发生。削弱美元本位地位能促进国际贸易公平性的提升,进而能减弱贸易摩擦带来的负面影响、提升全球福利水平,并能有效缩窄美国贸易逆差。     

强势美元政策：有效性检讨与可持续性分析

强势美元政策保证了外资对美国的强劲流入,支撑了美国的低通货膨胀,弥补了美国的储蓄———投资缺口和对外贸易逆差,巩固了美元的全球霸权地位,总之,强势美元政策促进了美国的经济增长。由于美国存在对强势美元政策的依赖性及美元的全球霸权地位没有受到实质性的挑战,在可预见的将来,强势美元政策仍会持续也仍可持续,美国仍将实行强势美元政策。     

集体钉住汇率制与地区金融稳定——兼评人民币汇率制度改革

20世纪90年代以来,东亚地区是国际金融比较动荡的地区之一。麦金农主张东亚各经济体实行“集体钉住美元”制度,以保证地区金融稳定。从理论和实践分析,集体钉住汇率制有其内在的稳定机制,也有内源性的动荡缺陷,稳定性和脆弱性同存。目前东亚各国和地区非正式的共同“软钉住美元”,有一定的合理性;但从长远看,这种集体钉住美元制度难以维持。当前人民币汇率改革不会影响东亚地区的金融稳定,维持国内金融稳定,才能防止地区金融动荡。     

美元霸权与国际货币体系稳定——从中国推动SDR使用说起

中国在国际经济贸易中的比重和作用越来越大,国际货币体系的研究和重构也越来越重要。战后国际货币体系是建立在管理货币本位基础上的,美元凭借美国霸权逐步成为国际货币体系之锚,货币本质上是国家政治权力的体现。美国霸权的合法性在于维持合理的国际秩序并提供国际公共物品为国际经贸往来搭建一个合作平台,它是以其他国家的承认为基础的。货币霸权使美国享有国际政治权力,如何处理国际公共物品与国家民族利益的公私矛盾和美元作为国际货币的特里芬难题,以及应对新兴崛起国的利益诉求等是国际货币体系管理难以回避的困境。中国应该坚持合作独立的货币国际化策略,勇于在主导新型国际金融机构方面承担大国责任,逐步建立广泛认可的国际合法性,谋求立足实体经济发展的货币国际化之路。     

Beyond the purchasing power parity: testing for cointegration and causality between exchange rates, prices, and interest rates

This paper reexamines the causality between the dollar and the yen in a multivariate framework with the aid of cointegration and error-correcting modeling for the 1951–94 period. The Phillips-Perron tests and Johansen's tests are performed. While causality from interest rates to exchange rates is found in the short run, no causality between prices and exchange rates is found in the short run. However, causality is found running from relative prices to exchange rates along with interest rates between the U.S. and Japan in the long run, which supports the long-run PPP hypothesis.     

美元特权对美国贸易逆差的影响探析

美元特权的形成使贸易逆差成为输出美元的主要途径,并对贸易逆差起到了助长作用,集中表现在美元特权使美国维持着巨额贸易逆差而不受外汇储备短缺的制约和金融危机的威胁,却使其他追求美元储备的国家依靠贸易顺差和过度储蓄来摆脱不利处境,从而从供给和需求两个方面推动了美国贸易逆差的持续扩大。但贸易逆差的继续发展和未来的调整势必会影响美元特权地位的巩固,使世界经济特别是发展中国家的国际经济活动面临极大的风险。     

Forward and spot exchange rates in a bivariate TAR framework

Structural exchange rate models explain only a small part of the movements in dollar exchange rate. Recent empirical work has focused on the failure to account for nonlinearities in the data generating mechanism, as an explanation of this bad performance. Here two bivariate threshold autoregressive models for the spot and forward exchange rates are considered. In the first model the regimes are determined by the log difference of the two rates; in the second one the regimes are driven by the forward spot no-arbitrage condition. These processes are able to capture the ‘swing’ behaviour observed in the exchange rate market. Finally the forecasting ability of the models for the dollar/DM exchange rate is evaluated by stochastic simulation.     

Global monetary policy under a dollar standard

This paper derives an optimal monetary policy in a world with a dollar standard, defined as an environment in which all traded goods prices are set in US dollars, so that exchange rate pass-through into the US price level is zero. We show that the US is essentially indifferent to exchange rate volatility, while the rest of the world places a high weight on exchange rate volatility. In a Nash equilibrium of the monetary policy game, US preferences dominate; the equilibrium is identical to one where the US alone chooses world monetary policy. Despite this, we find surprisingly that the US loses from the dollar's role as an international currency, since the absence of exchange rate pass-through leads to inefficient expenditure allocations within the US. Finally, we derive the conditions for a dollar standard to exist.     

美国经常项目赤字的可持续性研究

近年来，美国巨额经常项目赤字和美元持续贬值引起了经济学界的强烈关注，一些经济学家发出了美元和国际货币体系崩溃的警告。在现行国际货币体系即以资产为本位的泛布雷顿森林体系下。中心国家美国和外围亚洲国家形成了双赢的局面。该体系与布雷顿森林体系相比具有更大的安全性和稳定性。美国能够承受更大规模的经常项目赤字，并由此获得了更为灵活的政策操作空间。在某种程度上．美国巨额经常项目赤字是其雄厚的金融和经济实力的体现。