The Armington assumption and the size of optimal tariffs

There has been commentary on the seeming success of the world trading system in responding to the large shock of the 2008 financial crisis without an outbreak of retaliatory market closing. The threat of large retaliatory tariffs and fears of a 1930s style downturn in trade have been associated with numerical trade modelling, which projects post retaliation optimal tariffs in excesses of 100%. In the relevant numerical modelling, it is common to use the Armington assumption of product heterogeneity by country. Here, we argue and show by numerical calculation that the widespread use of this assumption gives a large upward bias to optimal tariffs, both first step and post retaliation, relative to alternative homogenous good models used in trade theory. The reason is that optimal tariffs equal the inverse of the foreign export supply elasticity and are negatively related to the elasticity of the foreign offer curve. The Armington assumption model has a much more bowed foreign offer curve, which generates unrealistic larger optimal tariffs.     

TRAFFIC MANAGEMENT IN WHOLESALE INTERNATIONAL ROAMING: TOWARDS A MORE EFFICIENT MARKET?*

Despite a general trend of lower charges for mobile calls, in Europe, prices for international roaming calls have remained at levels that are surprisingly high. The apparent reluctance of mobile network operators to lower roaming tariff is generating many antitrust concerns. This paper presents in a two‐country two‐firm framework the functioning of the current system governing wholesale international roaming agreements based on interoperator tariffs. The focus is on the role of traffic management; thanks to the emergence of traffic direction techniques, mobile network operators are allowed to select the roaming partner. We show that, unless these techniques do not allow for perfect control on traffic flows, traffic management does not improve the market's efficiency. In line with the regulatory mechanism recently adopted by the European Commission, we show that a simple price cap mechanism may restore partial efficiency in the wholesale market. We also show that although cross‐border cooperation at the wholesale level is Pareto efficient, it will not emerge as an equilibrium of a two‐sided matching game.     

The Costs of Restrictive Trade Policies in the Presence of Factor Tax Distortions

This paper uses a numerical general equilibrium model to examine the quantitative importance of pre-existing factor tax distortions for the welfare effects of tariffs and import quotas. The presence of pre-existing taxes can greatly raise the costs of these policies, possibly by over several hundred percent. For a tariff much of this extra cost can be offset if tariff revenues are used to reduce distortionary taxes. Hence there can be a large cost discrepancy between tariffs and quotas. The optimal tariff for a country with market power in trade can be reduced to zero, unless revenues finance cuts in distortionary taxes.     

Efficiency and Equity in Natural Resources Pricing: A Proposal for Urban Water Distribution Service

This paper focuses on the design of optimal prices for urban water distribution service. In this context, pricing should be aimed at achieving efficiency, equity, financial aspects, and/or public acceptability and transparency. The proposed tariffs are based on the theoretical frameworks suggested by Ramsey (1927) and Feldstein (1972). As a prior step, estimations of urban water demands and water costs are carried out for the Spanish municipality of Seville. Finally, an empirical comparison, in welfare terms, is conducted between the proposed tariffs and those applicable in the year 2000.     

“Buy Domestic” Campaigns and Optimal Tariffs

This paper attempts to analyze the strategic use of optimal tariffs and to examine the effects of national bias on the optimal trade policy and social welfare in a two-country, two-good, price competition model derived from Neven et al. (1991). The major findings are as follows. (1) If all consumers prefer the domestic good, then buy domestic campaigns will decrease the prohibitive tariff rate and increase local welfare. (2) If at least some consumers prefer the foreign good, but not to a great extent, then buy domestic campaigns will not change the optimal tariff rate, but may improve local welfare. (3) When all consumers greatly prefer the foreign good, then promotion of buy domestic decreases the optimal tariff rate, but it cannot improve social welfare. With this framework, we also prove that buy domestic campaigns serve as a substitute for tariffs with respect to a strategic trade policy.     

The Ramaswami Argument in a Multi-commodity Setting

This paper considers the optimum taxes and tariffs in a multi-commodity setting. Using the argument in Ramawami (1968), I show that when all goods and factors are tradable, the home country should buy out all the foreign factors. Conditions for the optimal terms of trade are also analyzed. In a single consumption good model, the foreign factors should be bought out at the foreign autarky prices. This result is only partially true in the more general setting. While factor mobility should be prohibited before the buy-out, non-prohibitive tariffs have to be imposed on trade in goods to attain the optimum terms of trade.     

Econometric Analysis of the India–Sri Lanka Free Trade Agreement*

This paper investigates whether the India–Sri Lanka Free Trade Agreement (ISLFTA) has had trade creation or trade diversion effects on the rest of the world. Using data on tariffs at the six‐digit level of the Harmonized System classification for the period 1996 to 2006, the methodology of the present paper follows a study on the North American Free Trade Agreement by Romalis (2005 ) We use the commodity and time variation in the tariff preferences allowed under ISLFTA to identify its effect on sourcing of different products from the ‘control country’ to the ISLFTA region. Using a fixed effects model, we find that the ISLFTA has had small trade creation effects in the control countries.     

Adopting sustainable innovation: what makes consumers sign up to green electricity?

This paper investigates what encourages consumers to adopt a green electricity tariff. When people decide to adopt an innovation, such as green electricity, they consider not only functionality, usability, costs and intended outcomes, but also what the innovation means to them, for example, the way it reflects their identity, image, memberships, values and norms. The study reviews the theoretical frameworks of innovation adoption and consumption, and cognitive and normative behaviour, relevant to consumer adoption of pro‐environmental innovations, and develops a research framework. Through focus group discussions, a questionnaire survey with 103 respondents and an interview with 10 people, the study finds that consumers sympathetic to environmental issues do not necessarily adopt green electricity. This is due to lack of strong social norms and personal relevance, inconvenience of switching, uncertainty about the quality of green electricity and lack of accurate information. The implications of these findings for strategy, policy and future research are explored. Copyright © 2009 John Wiley & Sons, Ltd and ERP Environment.     

碳关税对出口贸易影响研究综述

碳关税是近年来国际贸易领域新的热点问题,且该问题的提出使气候问题日趋贸易化、政治化。由于各国基于本国的利益,对碳关税问题的立场有所不同,所以国内外学者对碳关税的研究出发点亦存在着差异。力图通过文献回顾,从碳关税的内涵出发,探讨碳关税在WTO框架下的合法性问题,着重对国内外有关碳关税对出口贸易的影响以及应对策略等研究成果进行了梳理和分析,并在此基础上进一步提出该领域未来的研究方向。     

基于局部均衡视角的碳关税壁垒对我国出口影响的实证分析

碳关税具有名义上的合理性、对象上的歧视性、形式上的合法性和主体的广泛性等特征。碳关税对我国出口的冲击主要源于出口产品生产过程中碳排放强度,由局部均衡分析知,碳关税不但会对我国工业产品这个行业造成影响,还会对我国整体福利造成影响。我国政府应在国内开征碳税,完善国内碳交易市场,积极参与碳关税的制定;我国企业应加快新能源技术的开发和应用,实施低碳战略,以应对碳关税壁垒对我国出口的影响。