中国企业贸易类型与国际贸易集中度的关系——基于中国制造业企业微观数据的实证研究

运用2005—2006年中国制造业企业的微观层面数据,将参与贸易的企业划分为4类,采用Gini系数和Theil系数研究企业贸易类型与国际贸易集中度的关系。研究结果表明:在制造业内,中国制造业企业的贸易活动相对集中于少数制造业细分子行业;在制造业细分子行业内,少数企业的进出口贸易额占总贸易额的大部分,只有少数企业有较多的出口目的地和进口来源地,并且企业的进口来源地更为集中。     

The Loss from Trade under International Cournot Oligopoly with Cost Asymmetry

This paper examines the efficiency and welfare effects of intra‐industry trade in the presence of imperfect competition and heterogeneous technologies. We show that when a Southern country has a relatively less concentrated industry and faces low demand, the output of the Northern country may contract after initiating trade. Production inefficiencies can outweigh the gain effected by trade‐induced competition and lower price in trade, resulting in a net loss in the global welfare. In some circumstances, voluntary technology transfer, managed trade through VERs, or the introduction of a tariff can improve both trading partners' welfare.     

Fiscal Reliance on Tariff Revenues: In Search of a Political Economy Explanation?

One "stylized fact" about trade policy is that trade taxes as a proportion of total tax revenue are inversely related to a country's economic development, as in countries with poor administrative capabilities trade taxes represent the easiest way for governments to raise revenue (Administrative Capabilities Hypothesis). In this paper we develop an alternative explanation based on political economy considerations: using data from 64 developing countries from 1982 until 1997 we find that the Administrative Capabilities Hypothesis must be complemented with a political economy explanation in order to be able to provide a better account of the relevant empirical evidence.     

Have Falling Tariffs and Transportation Costs Raised US Wage Inequality?

To gauge the effect of international trade on the rising US skill premium, the paper analyzes the sector bias of price changes induced by changes in US tariffs and transportation costs. It is found that, in both the 1970s and 1980s, cuts in tariffs and transportation cost levels were concentrated in unskilled‐intensive sectors. Despite this suggestive evidence, the authors estimate that price changes induced by tariffs or transportation costs mandated a rise in inequality that was mostly statistically insignificant. Thus, they do not find strong evidence that falling tariffs and transport costs, working through price changes, mandated rises in inequality.     

The impact of oil prices on trade

This paper introduces an oil price–distance interaction variable in a gravity equation to explain how global trade behaves as a result of oil price changes. The findings are that as oil prices increase, international trade becomes more localized in that countries begin trading relatively more with their neighbors. In contrast, when they decrease, trade becomes more dispersed in that the distance between countries becomes less relevant. These results are highly significant across specifications, and the magnitude is not to be ignored. According to the full specification an oil price halving will make trade more dispersed by relatively increasing trade by 40% for a distance of 10,000 miles and by 25% for a distance of 1,000 miles.     

Return patterns of South Korean stocks following large price shocks

This study tests the market efficiency of the South Korean stock market by examining returns on stocks of the constituents of the KOSPI 50 from 2000 to 2014 following large 1-month price decreases and increases. An exponential GARCH (EGARCH) event study framework is used to analyse the stock returns. The results show that large price shocks, positive and negative, are likely to be followed by positive market returns. Moreover, the results show an increase in the beta of stocks in the years following a large price shock. The overall results therefore support the Uncertain Information Hypothesis. However, beginning in 2008, return patterns more closely reflect those hypothesised by the Efficient Market Hypothesis, possibly due to increased participation by international investors. The observed returns following large price increases and decreases can be partially explained by changes in the Korean won to US dollar exchange rate and the trading behaviour of foreign investors.     

Endogenous market power in an emissions trading scheme with auctioning

This paper contributes to the literature on market power in emissions permits markets, modeling an emissions trading scheme in which polluters differ with respect to their marginal abatement costs at the business-as-usual emissions. The polluters play a two-stage static complete information game in which their market power arises endogenously from their characteristics. In the first stage all polluters bid in an auction for the distribution of the fixed supply of permits issued by the regulator, and in the second stage they trade these permits in a secondary market. For compliance, they can also engage in abatement activity at a quadratic cost. Under the assumptions of the model, in equilibrium all polluters are successful in the auction. In the secondary market the low-cost emitters are net sellers and the high-cost emitters are net buyers. Moreover, the high-cost emitters are worse off as a result of the strategic behavior. In addition, the secondary market price is unambiguously above the auction clearing price. I find that the aggregate compliance cost when polluters act strategically increases in the heterogeneity of their marginal abatement costs at the business-as-usual emissions, but there exists a threshold of the fixed supply of permits above which strategic behavior is compliance cost-saving for the polluters. Finally, for a low enough variance of the marginal abatement cost at the business-as-usual emissions, strategic behavior is compliance cost-saving for the polluters, regardless of the level of the available supply of permits.     

Real and financial effects of insider trading with correlated signals

Summary. In this paper we study the real and financial effects of insider trading in a Static, Kyle-type model. In our model the insider is also the manager of the firm. Hence the insider chooses both the amount of the real output to be produced and the amount of the stock of the firm to trade. The aim of the paper is to study the relationship between financial decisions and real decisions. In particular, we examine how insider trading on the stock market affects the real output and price and how the real decision making affects the financial variables, such as the extent of insider trading, stock prices, and the stock pricing rule of the market maker. In the model, the market maker observes two correlated signals: the total order flow and the market price of the real good. We study the informativeness of the stock price and the effects on insider's profits. We also construct a compensation scheme that aligns the interests of the insider and the firm. Finally, we generalize the pricing rule set up by a competitive market maker and analyze the comparative statics of the model. Received: October 3, 1999: revised version: December 1, 1999     

区域贸易安排的“双边服务贸易效应”经验研究——基于扩展引力模型的2000-2009年面板数据分析

文章基于2000-2009年双边服务贸易面板数据,并运用扩展的引力模型,对区域贸易安排的"服务贸易效应"展开了经验研究。研究发现:(1)整体上看,"区域贸易安排"对双边服务贸易产生了显著的促进作用,但"区域货物贸易安排"对服务贸易的影响缺乏统计显著性。(2)"区域服务贸易安排"对双边服务贸易流量产生了显著的正向影响。"南北型"区域服务贸易安排的"服务贸易效应"超过了"南南型"和"北北型",而且非对称性的"南北型"区域服务贸易安排对双边服务贸易的影响最显著,将双边服务出口流量提升了73.71%-76.81%。(3)"区域服务贸易安排"对服务贸易的影响大致需2年时间逐渐释放,表明区域服务贸易安排的"渐入期"要小于区域货物贸易安排(约10年)。     

Economic Implications of Alternative Allocation Schemes for Emission Allowances*

For reasons of political feasibility, emission trading systems may have to rely on free initial allocation of emission allowances in order to ameliorate adverse production and employment effects in dirty industries. Against the background of an emerging European‐wide emission trading system, we examine the trade‐off between such compensation and economic efficiency under output‐based and emissions‐based allocation rules. We show that the emissions‐based allocation rule is more costly than the output‐based rule in terms of maintaining output and employment in energy‐intensive industries. When the international allowance price increases, the inferiority of emissions‐based allocation vis‐à‐vis output‐based allocation becomes more pronounced, as emission subsidies drastically restrict efficiency gains from international trade in emission allowances.     

对外贸易、进出口商品结构与我国城乡收入差距

笔者利用1978年～2008年期间的数据,对我国对外贸易和进出口商品结构对城乡收入差距的影响进行了实证研究。研究结果表明:对外贸易是影响我国城乡收入差距的重要因素;对外贸易总额、进口和出口对我国城乡收入差距的影响都表现为倒U型,符合库兹涅兹假说。目前,对外贸易总额、进口、出口与我国城乡收入差距的关系都表现为正相关,处于拐点之前;综合考虑直接影响和间接影响,出口商品结构优化缩小城乡收入差距的作用小于进口商品结构优化拉大城乡收入差距的作用,进出口商品结构优化的总效应表现为拉大城乡收入差距。因此,我国应该继续大力发展对外贸易,扩大进出口贸易规模,优化出口商品结构,以期实现对外贸易缩小城乡收入差距的新局面。     

晚清铁路建设与市场发展

1881—1911年中国兴起了铁路建设的浪潮。我们从史料中整理了这一时期的小麦价格,将府间价格差对铁路建设进行回归,发现铁路造成铁路连接的府的价格离散程度下降了3.8%,占当时整个价格离散程度下降的约40%,控制铁路建设的内生性以后结果依然显著。我们还发现,铁路提高了沿线府间与邻近铁路府间的市场整合程度。与此同时,铁路削弱了与其平行的传统商路沿线府间的市场整合程度,却提高了铁路与传统商路联运网络中府间的市场整合程度。     

Inventories and antidumping: the case of orange juice trade

The United States and Brazil are key players in the international market for orange juice, mainly frozen concentrated orange juice (FCOJ). The U.S. orange juice industry benefits from one of the highest levels of import protection in U.S. agriculture. Additional trade protection was recently added with a U.S. industry victory in an antidumping trade suit against Brazil. We study the impact of FCOJ imports from Brazil on U.S. prices using time series econometric models and find only a weak FCOJ domestic price response to imports from Brazil, because extremely large U.S. inventories mute the price impact of any fluctuation in imports. Our findings imply that the antidumping tariffs were unjustified based on a material injury argument.     

Monopoly power,barriers to competition and the pattern of price differentials in international trade

Numerous studies have attempted to assess the influence of market structure on performance in domestic markets of industrial countries. With few exceptions, these investigations have shown that prices and profits are higher, and a less efficient allocation of resources prevails, in markets where agressive competition is absent. Using techniques similar to there applied in the industrial market studies, this analysis examines the pattern of iron steel prices in international trade. The findings parallel those for the industrial organization investigations. Typically, international markets which are more concentrated, or which rely on a smaller number of trade contacts, bear higher prices. Also, the magnitudes of these excess price margins are such as to have important policy implications since they constitute a serious drain on the foreign exchange reserves of some developing countries.     

A New Approach to Currency Depreciation

Currency depreciation has been studied conventionally in terms of three hypotheses—the elasticities approach, the monetary approach and the absorption approach. In this paper we offer another hypothesis called the price approach, wherein the balance of payment disequilibrium results from an inappropriate price level. Specifically, a country has a trade surplus if the equilibrium price level is below that compatible with balanced trade; by contrast, it has a trade deficit if the price level is above that compatible with balanced trade. We illustrate the price approach with the experience of currency devaluations that have occurred in emerging markets since 1997.     

中国出口价格研究:优势还是风险?

中国出口价格不管与发达国家相比,还是与发展中国家相比都显著偏低,而且产品的技术等级越高,价格差别就越大,这与近年来中国出口贸易结构的显著改善背道而驰。究其原因,在于加工贸易是中国出口贸易的主体这一特殊性所致。如果排除加工贸易,中国出口产品的技术含量多年来并没有明显增加,这导致中国出口价格一直居于低位。随着中国劳动力短缺情形的逐步显现和人民币汇率的升值,中国低成本的优势正逐步丧失。中国应利用过渡期尽快实现加工贸易的转型升级,加大自主创新,强化产品定价的话语权,这对中国未来经济的发展是至关重要的。     

Tariffs,R&D,and two merger policies

We compare welfare-increasing and consumer-surplus-increasing merger policies in an oligopoly when merging firms face endogenous trade policies, and engage in cost-reducing R&D activity. As R&D becomes less efficient, the equilibrium market structures (EMS) become less concentrated under both merger policies. When R&D is very efficient, monopoly becomes the EMS under the welfare-increasing merger policy. This occurs as the absence of tariff and efficient R&D under monopoly limit the price increase and the gain in profits outweighs the loss in consumer surplus and tariff revenue. The results suggest that trade policies should take into account merger policies and industries' R&D efficiency. The results also show that global welfare maximization requires global merger policy coordination.     

Size and information revelation in securities trading

We examine differences in information content between order submission sizes and trade sizes by U.S. equity traders. Increasing (decreasing) order submission (trade) size is reflective of information. The result suggests that better-informed traders want to trade in a large size, but that they engage in stealth trading practices or break larger orders into smaller sizes in order to conceal information. While prior studies tend to narrowly focus on trade executions at the market-centre level, our findings indicate that order submission size varies significantly from trade size and that both sizes are informative about future prices, albeit in an inverse manner.     

Asset prices, exchange rates and the current account

This paper analyses the role of asset prices in comparison to other factors, in particular exchange rates, as a driver of the US trade balance. It employs a Bayesian structural VAR model that requires imposing only a minimum of economically meaningful sign restrictions. We find that equity market shocks and housing price shocks have been major determinants of the US current account in the past, accounting for up to 30% of the movements of the US trade balance at a horizon of 20 quarters. By contrast, shocks to the real exchange rate have been less relevant, explaining about 9% and exerting a more temporary effect on the US trade balance. Our findings suggest that large exchange rate movements may not necessarily be the key element of an adjustment of today's large current account imbalances, and that in particular relative global asset price changes could be a potent source of adjustment.     

Assessing the Impact of State Trading Enterprises

State Trading Enterprises (STEs) are periodically subject to intense scrutiny for their suspected negative impact on the international trade of agricultural goods. Sound empirical assessment of the impact of STEs is scant, in spite of the ongoing and intense debate over their impacts, especially in the context of reform at the WTO. In this paper we use the case of world wheat trade between 2212 country pairs over a 35 year span to assess STE impacts. Using a gravity model, we estimate a Poisson pseudo maximum likelihood fixed effects model of world wheat trade to assess the role of both the presence of STEs and STEs with monopoly power. Further addressing estimation challenges, we also estimate zero-inflated versions of Poisson and Negative Binomial Regression models. We find consistent support for the hypothesis that monopoly export STEs are associated with higher exports for their host country. Similarly, import STEs appear to inhibit wheat imports, suggesting a protectionist function.