Testing the law of one price in food markets: evidence for Colombia using disaggregated data

This article applies stationarity tests to examine evidence of market integration for a relatively large sample of food products in Colombia. We find little support for market integration when using the univariate KPSS tests for stationarity. However, within a panel context and after allowing for cross-sectional dependence, the Hadri tests provide much more evidence supporting the view that food markets are integrated or, in other words, that the law of one price holds for most products.     

农产品市场价格关系研究进展

从市场整合和市场边际两个方面评述了国内外农产品市场价格关系研究。首先介绍了空间分离市场均衡理论以及农产品市场价格关系研究的分析框架,然后评述了国内外市场整合和市场边际研究的进程,重点介绍了计量模型的发展与应用,指出供应链体系的市场整合和非对称性价格传递是现阶段的研究热点。最后提出要注意模型选择与数据可获得性等问题对研究结论的影响。     

国际农产品价格如何影响了中国农产品价格?

本文使用月度数据考察国际农产品价格是否影响中国农产品价格,以及影响程度和可能的影响机制。在控制了其他影响因素的条件下,本文证实了国际农产品价格对国内价格具有经济意义上的显著影响,各种农产品的国内价格对相同产品国际价格的反应程度存在较大差异,玉米、大米和大豆价格的国际价格弹性介于0.20到0.36之间,小麦的国际价格弹性为0.05左右,国内外农产品市场间高度的整合关系主要是通过国际贸易建立的。中国在未来为保持粮价稳定需要加大对农业的扶持力度,加强国内农产品储备,合理地对农产品贸易进行管制,建立农产品价格预警机制,并通过财政补贴等手段平抑因国际价格波动而带来的国内农产品价格上涨。     

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.     

Assessing Market Integration in ASEAN with Retail Price Data

We assess the extent of market integration the Association of Southeast Asian Nations (ASEAN) using a comprehensive data set that contains actual local retail prices for 131 goods and services in ASEAN countries (except Laos and Myanmar) over the period of 1990–2013. We conduct two different, but complementary, approaches: analyzing price dispersion and testing for convergence to the law of one price via panel unit root tests. The 1997 Asian crisis and, to a lesser extent, the 2008 global crisis appear to have caused a considerable disruption in the process of market integration. Despite significant tariff reduction under the ASEAN Free Trade Area commitments in the past two decades, the level of price dispersion across ASEAN is higher in 2013 than in 1990. Panel unit root tests accounting for cross‐section dependence show that convergence to the law of one price holds for only a minority of retail prices, including those of traded goods, in the ASEAN markets. We also consider a nonlinear exponential smooth transition autoregressive approach and a structural break as alternative adjustment dynamics in the panel unit root tests. Overall, our results suggest that there is much to be done in ASEAN to achieve a meaningful ASEAN economic community.     

The Modus Operandi of Protection*

The theory of (tariff and exchange-rate) protection usually assumes that imports and domestic substitutes sell at the same price and that exceptions to the ‘law of one price’ are due to imperfect substitutability. This article discusses the implications for the modus operandi of protection of the divergence between the prices of imports and of their domestic substitutes. It argues that the extent of this divergence will depend on imperfect price flexibility as well as imperfect substitutability. Whereas under ‘flex-price’ conditions, protection in the first instance merely redistributes income and changes market shares, output and employment only with a lag, protection under ‘fix-price’ conditions immediately affects market shares and (subject to inventory changes) output and employment.     

Risk aversion,exchange‐rate uncertainty,and the law of one price: insights from the market for online air‐travel tickets

Abstract We argue that risk aversion driven by exchange‐rate uncertainty causes a wedge between the domestic and foreign prices of a homogeneous good. We test our hypothesis using a unique micro‐data set from a market with minimum imperfections. The empirical findings validate our hypothesis, as accounting for exchange‐rate uncertainty we are able to explain a significant proportion of deviations from the law of one price. Overall, our analysis suggests the possibility of a new solution to the purchasing power parity puzzles.     

INTERNATIONAL DEVIATIONS FROM THE LAW OF ONE PRICE: THE ROLE OF SEARCH FRICTIONS AND MARKET SHARE*

This article examines the size and persistence of international deviations from the law of one price in an industry with search frictions. Cost differences lead foreign and domestic firms to price differently within countries. When local firms are more common in each country, there are large and persistent price differences across countries. Large and persistent changes in international relative costs lead to large and persistent changes in international relative prices. Dynamic considerations imply that the amount of a cost shock firms pass through to prices is U‐shaped in the market share of firms receiving the shock.     

Moore's law and price trends of digital products: the case of smartphones

ABSTRACT

Since the introduction of the iPhone by Apple in 2007 and Google's Android platform in 2009, the two systems have accounted for a total of 90% of the U.S. smartphone market. Apple, however, reaps most of the profit in the industry. In the second quarter of 2016, for example, Apple's iPhone gets 104% of the sector's profit. This suggests that the smartphone market resembles a Stackelberg leadership model. Despite Apple's strong market power, we investigate if the market leader is under pressure to be price competitive. We calculate a quality-adjusted price index for smartphones from 2007 to 2016. Our results show that the average price declines at an average rate of over 27% per year. The price trend is similar to other digit products such as computers, cameras, and portable music players. We observe that the large price decline reflects the effect of Moore's law, which predicts that the capacity of integrated circuits undergoes an exponential growth. The effect of Moore's law is incorporated into the Stackelberg model. We also observe that price trends of other digital products also follow a similar pattern. This suggest that the long-run price trends of digital consumer goods are somewhat independent of the market structures.     

Time-varying threshold cointegration and the law of one price

A theoretical model of the law of one price which allows for seasonality in transaction costs and supply and demand conditions between markets is developed. Bivariate three-regime threshold vector error correction models are applied to natural gas markets to examine seasonality in threshold levels. Results indicate that there are nonlinear adjustments to the law of one price in seven pair-wise markets (Chicago is used as the base market). In the natural gas sector, dynamic threshold effects relative to the Chicago market vary depending on season, geographical location and whether the market is an excess producing or consuming market.     

Market collusion and the politics of protection

This paper investigates the relationship between trade and competition policy within a model where market collusion and protectionist lobbying are themselves related. Collusion and lobbying are modeled as joint products of the same collective effort of firms. In equilibrium, firms cannot achieve greater cooperation in one dimension without reducing it in the other. A trade agreement that limits the effectiveness of lobbying may cause firms to increase market collusion, thereby increasing the domestic price. Thus, international trade agreements may run counter to the goals of competition policy. On the other side, a more restrictive competition policy is shown to either reduce the domestic price or reduce import protection. Thus, competition policy tends to promote trade policy goals. The reason is that restrictive competition policy undermines collusion at the source—it decreases the per-firm benefit to collusion relative to the gains from deviating—reducing firm cooperation in both dimensions.     

The effect of macroeconomic variables on the opening of antidumping measures: A robust analysis for Brazilian and Argentine economy

This paper analyzes the influence of macroeconomic factors on the introduction of antidumping (AD ) cases in Brazil and in Argentina. Since this type of research does not have large samples, the relevant variables were selected via Sala‐i‐Martin's (1997) test. The results, estimated using Poisson models, revealed that Brazil and Argentina are influenced by macroeconomic factors. However, the traditional (aggregated) models tend to minimize this influence on Brazil and overestimate it on Argentina. We also found that domestic and foreign income growth, exchange rate devaluation, and a reduction in domestic prices could reduce the number of AD cases in both countries. Therefore, there is evidence that these countries are using the AD law as a political tool, shifting it from its main objective of avoiding unfair trade.     

The effects of resale price maintenance laws on petrol prices and station attrition: empirical evidence from Wisconsin

The state of Wisconsin's Unfair Sales Act prevents the sale of any item below cost in order to attract business, and specifically requires petrol (gasoline) stations to mark up their prices by at least 6% over the wholesale price. While the ostensible reason for this law is to protect small, independent retailers and thus enhance competition, the evidence suggests that the primary result of this law has been to inflate the price of petrol for Wisconsin consumers and facilitate tacit collusion in retail petrol markets. Petrol prices in two major markets in the state are examined, as well as in one market outside of the state where no minimum markup is required. The data show that when the penalties for violating the Unfair Sales Act were strengthened, the average markup of retail petrol over the wholesale price increased significantly in Wisconsin without a commensurate change in the average markup in the market outside of Wisconsin. It is also found that price dispersion is significantly lower over a two-year period in the protected Wisconsin market than in the unprotected markets.     

An investigation into the dynamic relationship between international and China’s crude oil prices

This article studies the dynamic relationship between international (WTI, Brent and Dubai) and domestic (Da Qing) crude oil prices in China using threshold cointegration method. We find evidence of a long-run equilibrium relationship between each pair of international and Da Qing oil prices, favouring the market integration hypothesis. We also estimate asymmetric adjustments under the momentum threshold autoregressive (M-TAR) specification in a TVECM, and the results show that adjustments to eliminate disequilibrium happen faster when oil price spread increases than when it decreases. The long-run and short-run Granger causality tests support the notion that China has influence on the international oil markets. The results imply that China should open up its domestic and imported oil markets, and also establish a well-functioning crude oil futures market, as they are essential for arbitrage and hedging strategies.     

同种商品中外价格差的形成原因及应对策略

中国用最低的成本为世界制造高端产品,而中国人在购买这些商品时却享受不到低廉的价格,而是用最高的价格购买自己生产的产品,这一话题,引起人们的关注。此种情况已经给我国经济造成了较大影响,分析出现这种情况的原因,一是由从生产者到消费者手中的流通环节产生的,二是由于我国消费者不成熟的消费观念所导致的,三是国内缺乏竞争对手,进口商品的垄断所形成的。当前我国应通过努力降低流通环节成本,注重国内产品的品牌培育,增加日用消费品的进口等方面着手改变中外同种商品差价过大这一现象。     

Trade Policies for Exporting Industries under Free Entry

This paper computes optimal export taxes and domestic production subsidies for exporting industries under free entry. We show that domestic welfare is not at maximum, as is typically believed, when the export price is a monopoly price, and the domestic price is a competitive price, because a market structure effect has to be taken into account. Furthermore, we show that the optimal tax/subsidy formulas for an oligopoly coincide with those under perfect competition, if foreign and domestic demand functions are both linear. We also discuss optimal trade policies when only one instrument is available, and we run numerical simulations to determine and compare optimal trade taxes under endogenous and exogenous market structures.     

Wedges: Distribution,distortions, and market integration

This paper's model lets an international wedge continuously index a country's capital market integration with the rest of the world, and studies politico-economic determination of a domestic labor wedge that corrects market imperfections and/or redistributes welfare across differently wealthy voters. International integration influences the equilibrium policy, at given country-specific political and structural features, through the strength of factor price effects and through ownership of domestic and foreign capital by the country's citizens. If policy reduces market employment, then it unambiguously does so more strongly when a capital-poor country integrates more tightly with the rest of the world.     

Distortions to agricultural incentives: Evidence from Nigerian value chains

Understanding how policies affect price transmission and incentives for producers and consumers along the complete value chain is a relevant research question due to the more globalized structure of agricultural value chains. In particular, Nigerian agricultural value chains have been targeted by a number of policy decisions. We analyze the import‐oriented palm oil value chain and the export‐oriented cacao value chain, estimating the price distortions from policies and their implications for production incentives at the regional level. For palm oil, due to protective trade policies and domestic initiatives, the nominal rate of protection (NRP) at the farmgate for palm oil producers shows that producers have been protected. NRPs at the border for cacao beans and cocoa products are negative, which may be due to a quality gap, the export market structure, and the concentration of buyers in global markets. Negative NRPs at the farmgate are seen for all regions, showing disincentives in the cacao beans export market reverberate through the domestic market despite domestic support policies. In both value chains, NRPs at farmgate vary across regions partially due to regional policy frameworks and partially due to local conditions impacting price transmission.     

International cross-listing and stock market development in emerging economies

Why have emerging equity markets grown so rapidly since 1990? First, it is shown how international cross-listings can transform a segmented local equity market from an equilibrium of low liquidity and market capitalization to an integrated market with high liquidity and market capitalization by altering the incentives of companies and individuals to participate in the market. Second, benefits of international cross-listings for domestic stock market development and welfare across emerging equity markets are found to be negatively related to both the degree of correlation between the domestic and world equity market and the relative size of the domestic equity market. Third, the price impact of international listing is shown to depend on the liquidity conditions in the domestic market prior to listing.     

我国棉花短期价格波动研究——基于时间序列

采用ARCH模型对我国国内短期棉花价格波动的影响因素进行了研究。结果显示:棉花流通体制改革和市场宏观调控政策对棉花价格波动分别表现为正向影响和负向影响;棉花当期价格受一期和八期滞后价格影响,这显示出市场主体预期对市场变动趋势具有一定影响;国内持续上涨的需求对棉花市场价格波动的影响相对不显著,而供需缺口的变动是影响国内棉花价格波动的重要因素;棉花进口量的增加有利于减弱国内棉花价格波动;国际市场棉花价格波动对国内价格波动存在显著的正向影响。短期内棉花价格呈现出明显的季节特征,这种季节特征与市场预期、供需变化有较大关联。