GATT/WTO Promotes Trade Strongly: Sample Selection and Model Specification

Some recent empirical studies examine the impact of the GATT/WTO on trade. This paper investigates the sample selection bias and the gravity model specification issues in the literature. First, the GATT/WTO not only makes existing trading partners trade more at the intensive margin, but also creates new trading relationships at the extensive margin. Most existing papers exclude zero trade observations and hence ignore the extensive margin. Secondly, due to the violation of some maintained assumptions, the traditional log-linear gravity regressions fail to uncover the role of the GATT/WTO even at the intensive margin. Using a large bilateral panel dataset including zero trade flows and a more appropriate econometric method, this paper finds that the GATT/WTO has been very effective in promoting world trade at both the intensive and extensive margins.     

Tariff Liberalization and Trade Integration of Emerging Countries

This paper investigates how tariff liberalization has affected exporting at the product‐destination level in emerging countries. We use a highly disaggregated (six‐digit level of the harmonized system—HS—classification) bilateral measure of market access to compare tariffs applied in 1996 and 2006, which includes the timing of the Uruguay Round and episodes of bilateral liberalization. Our econometric estimations consider impacts of tariff cuts on three components of the trade margins: extensive margin of entry (new trade relationships at the product‐destination level), extensive margin of exit (disappearance of existing relationships) and intensive margin of trade (deepening existing relationships). Our main estimates indicate that a reduction of bilateral applied tariffs of 1 percentage point increases the extensive margin of entry by 0.1% and the intensive one by 2.09%, while it reduces the extensive margin of exit by 0.25%.     

Trade and the Euro: effects on bystanders

This article investigates trade effects of the euro focusing on the impact on bystanders. We use data for Swedish firms and examine the impact on exporting firms’ intensive and extensive margins of trade. Our result shows an overall increase in Swedish firms’ exports to the euro area after the introduction of the single currency, indicating that the euro has decreased trade costs also for outsiders. In addition, we find important heterogeneity in the sample, suggesting that it is the large majority of small firms that has increased trade flows with the Eurozone the most.     

Currency Unions,Export Margins,and Product Differentiation: An Empirical Assessment for European Monetary Union

This paper reconsiders the trade effects of the euro, providing a decomposition into its effects on the extensive margin and intensive margin. Furthermore, it relates the more disaggregated estimates for 93 two‐digit HS product groups to the elasticity of substitution, thereby testing a key hypothesis of heterogenous firm trade theory. The estimates for the period 1996–2011 suggest a trade effect of the euro of some 28%, which has mainly materialized through the intensive margin. A negative net effect of the euro on the extensive margin is found for several product groups, supporting anecdotal evidence that firms have consolidated their product varieties in response to the elimination of exchange rate variability. Finally, the disaggregated estimates are in line with heterogenous firm trade theory models, suggesting that a large elasticity of substitution dampens the effect of a trade cost reduction on the extensive margin and amplifies its effect on the intensive margin.     

Reconciling the WTO Effects on Trade at the Extensive and Intensive Margins

Empirical studies examining the impact of World Trade Organization (WTO) membership have produced disparate results. These studies, however, have focused on total aggregate trade flows. In this paper, we utilize disaggregated product level data to examine the impact of WTO membership on the product level extensive and intensive margin of imports. Utilizing the Poisson Pseudo-Maximum Likelihood (PPML) estimation that allows for heteroskedasticity in trade data and accounting for several estimation issues, we do not find a positive impact on either margins between WTO member country-pairs. Once we examine asymmetries in trade flows across countries based on their level of development, we find that developing WTO members experience an increase in the extensive margin from industrial member countries. Additionally, the industrial WTO members also experience an increase in the extensive margin from developing WTO members. Results suggest that WTO facilitates the North–South trade relationship, which has been largely absent in trade literature.     

Impact of China on trade in electronic products

Using 6-digit product-level data of exports in electronics, this paper finds robust evidence that China's exports adversely affect both the intensive export margin and the extensive export margin of its competitors for the 1992–2018 period. The displacement effects of China's exports on the intensive margin apply especially for the group of intermediate and capital electronic goods and are much more robust and significantly larger in magnitude than the displacement effects found in other studies using aggregated trade data. Finally, we find that China's displacement effect is increasing in China's advantage relative to its competitors in terms of human capital index and internet access of its population.     

标准化对中国出口贸易的影响效应——基于局部均衡的分析

由于技术差距的存在,中国出口贸易产品的技术标准普遍低于美、日、欧等发达国家,因此,标准化对中国出口贸易的影响显著。从局部均衡的角度分析短期和长期的不同影响效应发现：在短期内,标准化对中国的出口贸易效应主要是负面的,表现为贸易限制效应、贸易转移效应和贸易条件效应;而在长期情况下,如果企业能够积极改进,不断创新,那么标准化对中国的贸易会产生积极的促进效应,贸易量会增加,同时贸易条件也会得到改善。     

贸易成本、企业出口动态与出口增长的二元边际-基于中国出口企业微观数据:2000-2005

本文基于企业异质性贸易理论框架,利用中国海关数据从企业层面将中国出口增长分解为扩展边际(出口企业数量)与集约边际(单位企业的平均出口额),描述了中国企业出口动态和二元边际结构,并考察不同贸易成本的作用机制。结果发现,2000—2005年间尽管扩展边际的波动幅度远大于集约边际,中国出口的增长仍大部分是由持续出口企业的贸易额扩大实现的;各种因素对二元边际的作用机制和程度不尽相同,经济规模、距离和贸易成本的变动主要通过扩展边际影响贸易流量。     

论中国外贸增长方式的转变

改革开放以来,中国的外贸事业取得了巨大的成就,中国已是名副其实的贸易大国,但还不是贸易强国.粗放型的外贸增长方式严重制约着中国经济的可持续发展,急需由数量、规模、粗放型的外贸增长方式转向质量、效益、集约型的外贸增长方式,这是进一步促进改革开放、应对经济危机和深入学习实践科学发展观的重大战略选择.     

Multi-product firms,heterogeneous quality and exporting behaviour: product-level evidence from the movie industry

This article examines how quality affects heterogeneous multiple-product firms’ exporting behaviours. We develop a structural model of the global movie market, including both consumers’ movie demand choices and firms’ exporting decisions. A movie studio is a multi-product firm that releases many movies within a year. We model movie quality as a combination of firm-level appeal and product-level attractiveness. We find that both studio-level and movie-level heterogeneity affect demand for movie, and movie-level heterogeneity is relatively more important. We also explore the counterfactual effects of quality improvement and trade liberalization on trade. Our results show that improvement of quality increases both intensive margin and extensive margin of trade. By elimination of quota, we find that trade liberalization increases movie exports to a foreign market by 19%. The results of our study can also help improve understanding of trade in the service industry. For instance, we do not find a positive correlation between the foreign entry costs and the geographic distance, as in the case of manufacture goods.     

How do Multiproduct Exporters React to a Change in Trade Costs?*

We use data on individual French exporters to document how a change in trade costs, following the introduction of the euro, affected the export margins of firms in relation to export decisions, the number of products exported, and the average sales per product. Our results confirm two effects predicted by the theory: firms increase the range of products they export as well as their intensive margin. This effect is most evident in markets with moderate monetary policy coordination before 1999. General equilibrium competition effects reduce the initial positive impact on each of these margins. We find no evidence that firms increase their participation in the export market.     

贸易自由化是如何影响我国出口产品质量的？*--基于贸易政策不确定性下降的视角

传统理论认为贸易自由化会促进出口产品的质量升级,但我国加入W TO后的情况却并非如此。文章基于贸易政策不确定性的视角,利用我国加入W TO前后美国对我国产品进行关税调整这一自然实验,通过倍差法分析了贸易自由化对我国出口产品质量的影响。研究表明：（1）在贸易自由化的过程中,贸易政策不确定性的下降会拉低我国的出口产品质量,且这一结论在改变质量测度方法、控制成本效应以及使用不同的产品属性、贸易对象和样本的情况下依然稳健;（2）贸易政策不确定性主要是通过广延边际上的质量调整降低了我国出口产品的总体质量,即在贸易政策不确定性下降幅度越大的产品中,有越多的生产低质量产品的企业进入出口市场;（3）在集约边际上,存续企业并未针对贸易政策不确定性的下降做出及时的产品质量调整,从而无法改变我国的产品质量在短期内下降的趋势。文章为我国如何在推行贸易自由化的同时实现出口产品质量升级提供了启示。     

Exports,investment and policy uncertainty

Building on a literature that underscores the value of delaying investment in the face of uncertainty, we study how policy uncertainty in 18 large economies affects exports to these economies. We decompose aggregate bilateral trade flows from 1995 to 2013 into intensive and extensive margin components and employ a gravity specification to assess the impact of policy uncertainty on each margin separately. Consistent with theory, increases in policy uncertainty decrease both trade values and the extensive margin but, if anything, increase the intensive margin. In further tests, we use various proxies for sunk export costs and demonstrate that the effects of policy uncertainty are more pronounced where sunk costs are higher.     

The Belt and Road Initiative and China's Export: A Soft Power Perspective

Using a newly built soft power index, we examine whether and how soft power affects Chinese firm-level export to the Belt and Road (B&R) countries from 2000 to 2016. We find that soft power has significantly positive effects on both export value and export product types for the B&R countries. These effects are more pronounced than those for non-B&R countries and differ not only between the "Belt" and the "Road" countries but also regional groups, firm ownerships, modes of trade, and sectors. Further analysis shows that soft power increases the intensive margin of exports by approximately three times that of the extensive margin. Thus, our findings provide a new perspective for understanding both the Belt and Road Initiative (BRI) and the contemporary economic evolution occurring in China.     

Aid for trade and the quality of exports

This article studies how aid for trade (AfT) affects the quality of recipient countries’ exports. It shows that the quality effect is most discernible for AfT for assistance in trade policy: a 50% increase in the value of AfT received in this category is associated with a 0.5–1% increase in the quality of exports to the donor and other OECD countries. On average, the actual AfT received for assistance in trade policy leads to a 2% upgrade of the recipient country in the quality ladder of all developing countries. Around half of this quality effect is driven by the quality improvement of continued products in continued markets (intensive margin), and the other half by the quality upgrading of new products in continued markets and existing products in new markets (extensive margin).     

Ethnic networks and trade: Intensive versus extensive margins

Ethnic networks have been associated with increased international trade, although studies have not differentiated between entry into foreign markets and trade expansion. We find that ethnic networks increase trade on the intensive margin but not on the extensive margin.     

异质性企业、结构转型与稳定出口

通过构建异质性企业、结构转型和出口增长的二元边际理论模型,本文认为转型国家出口增长主要沿集约边际实现的原因与其农业剩余劳动力有关,农业剩余劳动力越多,出口增长的集约边际越大、扩展边际越小。利用Tobit模型对1995-2009年中国出口到123个国家的HS-6位码贸易数据进行实证分析,在控制其他影响因素的前提下,我国农业剩余劳动力非农转移显著正向影响出口增长集约边际、负向影响扩展边际的效应确实存在。经济规模、贸易成本、人民币升值、区域经济一体化、外部冲击、语言的相通性、政治体制等变量对中国出口增长二元边际的影响机制不完全相同,表明要提高出口增长中的扩展边际比重,出口企业应实施市场多元化战略,将目标市场从传统高收入国家转移到发展中国家来,实现出口的稳定增长。     

External Imbalances and the Extensive Margin of Trade

We quantify the role of the extensive margin in the recent trade dynamics of selected countries that are running large and persistent trade imbalances. We find that the role of the extensive margin is quite substantial, although it varies in significance across the countries in the sample. Finally, we highlight differences in behaviour between the fixed‐varieties and varieties‐adjusted terms of trade.     

Quantifying the trade-reducing effect of embargoes: Firm-level evidence from Russia

In 2014, Russia responded to sanctions imposed by a coalition of Western countries with a retaliatory import embargo. I draw on this unique case study and a customs data set on firm-level import transactions to investigate the ramifications of Russia's counter-sanctions on firm-level foreign trade. Using detailed data and a triple-difference estimation strategy, I examine micro-level dynamics and heterogeneities that aggregate data alone do not reveal. I identify the effects of the embargo on the extensive margin (the probability that a firm imports a particular product from a given country in a particular time period) and the intensive margin (the value of a firm's import transaction) of firm-level trade, as well as its effects on logged unit values. The main findings of this study show that the embargo had statistically significant negative impacts on extensive and intensive margins of firm-level trade. I also pinpoint evidence of multiple exemptions from the embargo and a large degree of heterogeneity of firm-level responses to the embargo based on firm attributes, such as firm size and government connection.     

Trade responses to geographic frictions: A decomposition using micro-data

A large literature has shown that geographic frictions reduce trade, but has not clarified precisely why. In this paper, we provide some insight into why such frictions matter by examining what parts of trade these frictions reduce most. Using data that track manufacturers’ shipments within the US on an exceptionally fine grid, we find that the pattern of shipments is extremely localized. Shipments within 5-digit zip codes, which have a median radius of just 4 miles, are 3 times larger than shipments outside the zip code. We decompose aggregate shipments into extensive and intensive margins, and show that distance and other frictions reduce aggregate trade values primarily by reducing the number of commodities shipped and the number of establishments shipping. Extensive margins are particularly important over very short distances. We examine trade in intermediate goods as an explanation for highly localized shipments and the dominant role of the extensive margin and find evidence consistent with this hypothesis. In another significant finding, we find no evidence of state-level home bias when distances are measured precisely and trade is observed over a very fine grid.