Assessing the Enlargement and Deepening of the European Union

This paper estimates a theoretically‐motivated gravity model to examine the effect of the European Union (EU) on trade and whether the order of entry has affected the trade performance of member countries. Additionally, we analyse the impact of the different phases of EU integration on trade. The results show that both original countries and successive enlargements boost intra‐bloc trade. Moreover, the results suggest that the deepening in the integration process has led to more trade creation among members. Finally, only the latter phase of the European integration process (the single currency) has increased trade with non‐members.     

The dynamic effects of a currency union on trade

The response of trade to a monetary union is a dynamic process. An empirical study of the European monetary union finds that the extensive margin of trade in new goods responded several years ahead of EMU implementation and ahead of overall trade volume. A dynamic rational expectations trade model shows that early entry of new firms in anticipation is explainable as a rational forward-looking response to news. The model helps identify which types of trading frictions are reduced by a currency union, and shows how new entry can be affected by uncertainty about EMU.     

Innovation and trade with heterogeneous firms

This paper examines how trade liberalization affects the innovation incentives of firms, and what this implies for industry productivity. For this purpose we develop a reciprocal dumping model of international trade with heterogeneous firms and endogenous R&D. Among the robust results that hold both in the short run when there is no entry, and in the long run under free entry are that trade liberalization increases aggregate R&D when trade costs are low and decreases R&D when trade costs are high. Expected industry productivity rises as trade costs fall.     

The Impact of Sanitary and Phytosanitary Measures on Market Entry and Trade Flows

In an attempt to disentangle the impact of sanitary and phytosanitary (SPS) measures on trade patterns, we use the database on specific trade concerns on SPS measures of the WTO. Estimating various gravity model specifications at the HS4 disaggregated level of trade, we find that aggregated SPS measures constitute obstacles to agricultural and food trade consistently to all exporters. But conditional on market entry, trade flows are positively affected by SPS measures. In addition, we find that SPS measures related to conformity assessment hamper market entry, while SPS measures related to product characteristics increase bilateral trade flows conditional on meeting the standard.     

Unions, competition and international trade in general equilibrium

We develop a two-country, multi-sector model of oligopoly in which unionised and non-unionised sectors interact in general equilibrium. The model is used to study the impact of trade liberalisation, deunionisation and firm entry on wages in unionised and non-unionised sectors, and on welfare. We find that a shift from autarky to free trade increases non-union wages and welfare, whereas the effect on union wages is ambiguous. We also show that partial deunionisation leads to higher wages in both unionised and non-unionised sectors, but only increases welfare when the proportion of unionised sectors is sufficiently low. Finally, wages in non-unionised sectors necessarily increase with firm entry, while the response of union wages and welfare depends on the trade regime.     

Trade and imperfect competition in general equilibrium

This paper employs a multi-industry general equilibrium model of oligopolistic competition, free market entry and trade in which capital is used to establish firms and labor is used for production. We show that both absolute and relative endowments matter for the pattern of trade. We demonstrate that market entry to each industry is either too excessive or too moderate while the effect on firm size is ambiguous. If countries are sufficiently symmetric, trade will increase the wage–rental ratio in both countries. Furthermore, trade will increase per-capita consumption in capital-intensive industries and reduce it in labor-intensive industries. Nevertheless, trade will be mutually welfare-improving under relatively mild conditions.     

加入WTO对中国双边贸易增长贡献的实证研究——兼论影响中国双边贸易增长的因素

本文根据中国双边贸易的实际情况,对传统的贸易引力模型进行了改进,应用改进后的引力模型研究了加入WTO对中国双边贸易增长的贡献,并探讨了其它因素对中国双边贸易增长的影响。研究结果表明,加入WTO对中国与WTO成员之间的双边贸易增长贡献了19.6%,贸易伙伴GDP增长、中国GDP增长、贸易伙伴对中国的直接投资额、APEC的贸易制度安排、香港和新加坡的转口贸易等因素都对中国贸易增长有显著正面影响,而运输成本则是阻碍中国与贸易伙伴之间贸易增长的主要因素。     

The trade comovement puzzle and the margins of international trade

Countries that trade more with each other tend to have more strongly correlated business cycles. Yet, traditional international business cycle models predict a much weaker link between trade and business cycle comovement. We propose that fluctuations in the number of varieties embedded in trade flows may drive the observed comovement by increasing the correlation among trading partners' aggregate productivity. Our hypothesis is that business cycles should be more strongly correlated between countries that trade a wider variety of goods. We find empirical support for this hypothesis. After decomposing trade into its extensive and intensive margins, we find that the extensive margin explains most of the trade–productivity and trade–output comovement. This result is striking because the extensive margin accounts for only a fourth of the variability in total trade. We then develop a two-country model with heterogeneous firms, endogenous entry, and fixed export costs, in which the aggregate productivity correlation increases with trade in varieties. A numerical exercise shows that our proposed mechanism increases business cycle synchronization compared with the levels predicted by traditional models.     

Exporting under trade policy uncertainty: Theory and evidence

I provide novel evidence for the impact of trade policy uncertainty on exporters. In a dynamic, heterogeneous firms model, trade policy uncertainty will delay the entry of exporters into new markets and make them less responsive to applied tariff reductions. Policy instruments that reduce or eliminate uncertainty, such as binding trade policy commitments at the WTO, increase entry. The predictions are tested on disaggregated, product-level Australian imports with model-consistent measures of uncertainty. The estimates show that growth of exporter–product varieties would have been 7% lower between 1993 and 2001 without the binding commitments implemented after the WTO was formed in 1996. If Australia reduced all its tariffs and bindings to zero, more than half of predicted product growth is accounted by removing uncertainty. These results illuminate and quantify an important new channel for trade creation.     

我国农产品贸易流量现状与影响因素:基于引力模型的实证研究

基于1992-2009年的面板数据,描述了我国农产品贸易流量的概况、主要市场和贸易品种,实证检验了影响我国农产品贸易流量的主要因素。运用贸易引力模型发现,人口规模、经济规模、加入世贸组织(WTO)和亚太经合组织(APEC)对双边农产品贸易有促进影响,而贸易国间距离、人均收入差异、突发的金融危机对贸易流量存在负面影响。最后针对实证结果提出促进我国农产品贸易的对策建议。     

International trade and macroeconomic dynamics with labor market frictions

This paper studies how labor market frictions affect the consequences of trade integration in a two-country dynamic stochastic general equilibrium model with heterogeneous firms and endogenous producer entry. Two main results emerge. First, trade integration is beneficial for welfare by inducing higher productivity, but unemployment can temporarily rise during the transitional adjustment. Labor market rigidities reduce gains from trade, even though they can mitigate short-run employment losses. Second, consistent with the data, the model predicts that stronger trade linkages lead to increased business cycle synchronization. The strength of this effect, however, depends on the labor market characteristics of the integrating partners.     

入世以来我国服务贸易国际竞争力变动分析

对入世以来我国服务贸易的整体及各行业的国际竞争力进行了实证分析,得出我国服务贸易整体国际竞争力较低而且有下降趋势,而我国服务贸易各行业国际竞争力状况却不尽相同的结论,由迈克尔·波特的“钻石模型”给出我国服务业国际竞争力的钻石模型,并根据该模型提出了增强我国服务贸易国际竞争力的几点对策。     

基于引力模型的中越入境旅游影响因素分析

中国-东盟自贸区如期建成,中国与越南互为旅游客源地发展态势加强。本文基于引力模型,以2004-2008年中国接待越南入境旅游为样本,构建了中国与越南入境旅游的理论模型,并运用Eviews6.0软件进行回归分析,研究发现两国名义GDP、入境接待人数、地理距离和国家边界等变量对中国接待越南入境旅游有较大的影响,进一步结构化分析验证GDP和地理距离对入境旅游均产生一定的新息冲击。     

The quality of innovation and the extent of the market

I present a comprehensive model of international trade in technology that considers both the demand for inventions and the supply of inventions. On the demand side, domestic and foreign firms make strategic technology adoption decisions. On the supply side, inventors compete to sell licenses for their technology to domestic and foreign firms. Countries benefit from international trade in technology because they obtain the best invention from a larger pool of inventions. International trade in technology increases the extent of the market for inventions and thereby improves the quality of innovation. Technology trade lowers prices, increases outputs, and increases the volume of trade in differentiated products. When traded products are not close substitutes, international markets for technology generate gains from trade. The results of the analysis are robust to the possibility of technology transfer either through expropriation or imitation. Protection of intellectual property rights preserves incentives for entry of inventors and improves the quality of innovation.     

European Union Market Access Conditions and Africa's Extensive Margin of Food Trade

This paper examines the impact of two European Union (EU) market access regulations in the food sector presumed to simultaneously affect firms’ decisions to export food products to the EU. We analysed EU pesticide standards on African exports alongside a complementary non‐tariff measure in the form of a minimum entry price regulation, which aims to protect EU growers of certain fruits and vegetables against international competition. Analysis was based on Africa's exports of tomatoes, oranges, and lime and lemon to the EU between 2008 and 2013, using the gravity model of trade. Our results show that EU market access conditions constitute significant barrier to the formation of new trade relation between the EU and Africa. In addition, initiation of trade relationships is contingent not only on market access conditions but also on domestic market constraints in Africa. These results imply that negotiating preferential entry prices duties and the removal of domestic market restraints as well as strengthening domestic capacity to comply with EU standards to enhance continuous market access for the continent could stimulate food trade along the extensive margin.     

Firms' entry,monetary policy and the international business cycle

This paper proposes a two-country monetary model with firm entry as a means for alleviating the comovement puzzles in international business cycle models. It shows that business formation can generate fluctuations in output, employment, investment and trade flows close to those in the data while at the same time providing positive international comovements. Simulations show that the presence of imported investment goods is essential for replicating these facts.     

我国内贸与外贸的动态影响研究——基于VAR模型的实证

文章使用我国加入WTO以来的最新月度数据,通过协整检验、误差修正模型、Granger因果关系检验等方法,对我国社会消费品零售总额、出口总额和进口总额之间关系进行了实证研究。结果表明,三者之间存在长期稳定的均衡关系;短期内外贸带动内贸发展的效果并不明显;内贸对外贸的促进作用仅表现为内贸对出口的长期影响。为此,我国应该采取相关对策,进一步加快内外贸一体化的进程。     

Productivity, terms of trade and the ‘home market effect’

This paper analyzes the international transmission and welfare implications of productivity gains and changes in market size when macroeconomic adjustment occurs both along the intensive margin of trade (changes in the relative price of existing varieties of tradable goods) and the extensive margin (creation and destruction of varieties). We draw a distinction between productivity gains that enhance manufacturing efficiency and gains that lower the cost of firms' entry and of product differentiation. Countries with lower manufacturing costs have higher GDP but supply their products at lower international prices. Instead, countries with lower entry costs supply a larger array of goods at improved terms of trade. Output growth driven by demographic expansions, as well as government spending, is associated with an improvement in international relative prices and firms' entry. While trade liberalization may result in a smaller array of goods available to consumers, efficiency gains from deeper economic integration benefit consumers via lower goods prices. The international transmission mechanism and the welfare spillovers vary under different asset market structures, depending on trade costs, the elasticity of labor supply, and consumers' taste for varieties.     

Learning to export: Export growth and the destination decision of firms

I find evidence that the geographic expansion of firm exports occurs slowly over time and that a large share of export growth is due to incumbent exporters entering new destinations. New exporters enter large countries and destinations with characteristics similar to their domestic market. Less similar, distant or less developed countries are entered by firms already exporting to other destinations. I formulate a dynamic general equilibrium model to test if these patterns are due to firms learning how to export (as other recent empirical findings have suggested) or other factors considered in the literature. In this model, heterogeneous firms experience learning in the form of market entry costs that depend on export history. Using Russian firm level data, I find that learning plays a significant role in explaining the observed entry patterns, which standard trade models cannot account for.     

Strategic trade policy in the presence of reputation spillovers

With the emergence of North–South intra-industry trade in products where consumers value quality, exporting countries potentially face significant barriers to entry. Due to the existence of asymmetric information about new products in a foreign market, the producer's reputation becomes an important factor in determining whether consumers choose to make a purchase. The purpose of this paper is to add learning externalities across multiple products to a model of endogenous firm entry and quality in order to examine the implications for commercial intervention. Building on the work of Mayer (1984) and Grossman and Horn (1988), we introduce learning across multiple products in the presence of incomplete information. If the reputation of the initial entrants from a country is poor, it raises the informational barriers to entry. Consequently, strategic trade policy depends on both the quality choice of firms entering the market for exports as well as the degree of product interrelatedness. In the presence of high and lowquality producers, across-the-board subsidization hinders rather than promotes exports in developing countries.