Trade and the environment : a survey of the literature

The recent revitalization of concern for environmental quality has generated many questions about the interaction between trade and the environment. Most of these questions have to do with the impact of environmental regulation on trade patterns and gains from trade. If a tradeoff is perceived, it is often argued that some intervention becomes appropriate: either a specific trade policy or the establishment of an international environmental standard. Present GATT policy then becomes an issue of debate. Should GATT revise its rules to accommodate the specific trade measures suggested? How can GATT ensure that the environmental objective is not a disguise for a trade barrier? Should GATT establish some international environmental standard with procedures to ensure compliance? The importance given to trade liberalization and exchange rate policy reform as part of adjustment for development has raised another set of questions: Is there a direct link between the removal of trade barriers and environmental degradation? If so, how should liberalization strategies incorporate this cost? Should trade policy be used to meet environmental objectives? The author surveys the literature on the main questions being debated in both of these areas. Among her conclusions: (1) More stringent regulations in one country are thought to result in reduced competitiveness and perhaps industrial flight and the development of pollution havens. The many empirical studies that have tried to test these hypotheses have shown no evidence to support them. (2) Countervailing duties or an international environmental standard have no place here. Both concepts ignore the reallocation of resources that must occur if externalities are to be efficiently incorporated into costs. They also ignore the fact that standards should be based on local calculations of marginal costs and benefits. Only if an exporter's standards are below what is locally optimal would a countervailing duty be justified. (3) Subsidies are likely to be trade barriers in disguise and should generally not be accommodated. They are not usually an efficient means of achieving an environmental objective and may hinder the efficient allocation of resources away from pollution-intensive industries. (4) Imposing a tariff when pollution spills over national boundaries can be no more than a second-best policy. If the tariff is based on damage to the victim country alone, it will not reduce trade in the polluting product enough; if it maximizes the welfare of the victim, it may reduce trade in the product too much. (5) There seems to be a case for establishing some international code of product standards, to prevent the use of such standards as nontariff barriers.Environmental Economics&Policies,Economic Theory&Research,Water and Industry,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Health Monitoring&Evaluation

Do Preferential Trade Agreements Promote Growth? An Evaluation of the Caribbean Basin Economic Recovery Act

The few empirical studies which examine the effects of preferential trade liberalization on growth find no direct relationship between membership in a PTA and growth across countries. This is somewhat surprising, given the large literature which argues that trade liberalization is likely to encourage more rapid growth. However, sensitivity analysis has shown that this link between freer trade and growth may be indirect, as freer trade strongly increases investment, and higher investment strongly increases growth. This paper tests for both direct and indirect effects of preferential trade liberalization on growth and investment, by examining the impact of the Caribbean Basin Economic Recovery Act--a non-reciprocal PTA implemented by the U.S. in 1984 to encourage growth and development in Caribbean and Central American countries. A two-equation simultaneous system is estimated, using pooled data on twelve beneficiary countries, from 1970-1998. Results suggest that CBERA did not result in any "trade-induced investment-led growth." It may have had a direct impact on growth in the region, but the effect was small, and significant only when combined with trade and foreign exchange reforms on the part of the beneficiary countries themselves. However, preferential trade liberalization through the production-sharing program, and unilateral and regional trade reforms in beneficiary countries and in the US did lead to investment-led growth, and to higher growth directly, in the CBERA countries.International Development, International Relations/Trade,

Spin-Dependent Neutralino-Nucleus Scattering for A∼127A \sim 127 Nuclei

We perform nuclear shell model calculations of the neutralino-nucleus cross section for several nuclei in the A = 127 region. Each of the four nuclei considered is a primary target in a direct dark matter detection experiment. The calculations are valid for all relevant values of the momentum transfer. Our calculations are performed in the $3s 2d 1g_{7/2} 1h_{11/2}$ model space using extremely large bases, allowing us to include all relevant correlations. We also study the dependence of the nuclear response upon the assumed nuclear Hamiltonian and find it to be small. We find good agreement with the observed magnetic moment as well as other obervables for the four nuclei considered: ^{127}I, ^{129,131}Xe, and ^{125}Te.Comment: 23 pages + 7 postscript figures. LaTeX uses RevTe

Florida's West Coast inlets: shoreline effects and recommended action

This report responds to the 1986 Beaches Bill which, in recognition of the potential deleterious impact on Florida's beaches of inlets modified for navigation, mandated a study of those inlets with identification of recommended action to reduce the impacts. This report addresses west Coast inlets; East Coast inlets are the subject of a companion report. There are 37 inlets along that portion of Florida's West Coast commencing from Pensacola Bay Entrance to Caxambas Pass at the south end of Marco Island. Compared to those on the East Coast, most West Coast inlets have not had the deleterious effects on the adjacent beaches, yet all modified inlets without proper management have the potential of impacting unfavorably on the adjacent shorelines. Moreover, at present there is interest in opening three West Coast entrances which either have been open in the past (Midnight Pass) or which have opened occasionally (Navarre Pass and Entrance to Phillips Lake). A review of inlets in their natural condition demonstrates the presence of a shallow broad outer bar across which the longshore transport Occurs. These shallow and shifting bar features were unsuitable for navigation which in many cases has led to the deepening of the channels and fixing with one or two jetty structures. Inlets in this modified state along with inappropriate maintenance practices have the potential of placing great ero$ional stress along the adjacent beaches. Moreover. channel dredging can reduce wave sheltering of the shoreline by ebb tidal shoals and alter the equilibrium of the affected shoreline segments. The ultimate in poor sand management practice is the placement of good quality beach sand in water depths too great for the sand to reenter the longshore system under natural forces; depths of 12 ft. or less are considered appropriate for Florida in order to maintain the sand in the system. With the interference of the nearshore sediment transport processes by inlets modified for navigation, if the adjacent beaches are to be stabilized there must be an active monitoring program with commitment to placement of dredged material of beach quality on shoreline segments of documented need. Several East Coast inlets have such transfer facilities; however. the quantities of sand transferred should be increased. Although an evolution and improvement in the technical capability to manage sand resources in the vicinity of inlets is expected, an adequate capability exists today and a concerted program should be made to commence a scheduled implementation of this capability at those entrances causing greatest erosional stress on the adjacent shorelines. A brief summary review for each of the 37 West Coast inlets is presented including: a scaled aerial photograph, brief historical information, several items related to sediment losses at each inlet and special characteristics relevant to State responsibilities. For each inlet, where appropriate, the above infor~tion is utilized to develop a recommenced action. (PDF has 101 pages.

Application of Computational Chemical Shift Prediction Techniques to the Cereoanhydride Structure Problem-Carboxylate Complications.

Despite the vast array of techniques available to modern-day chemists, structural misassignments still occur. These misassignments are often only realized upon attempted synthesis, when the spectra of synthesized products do not match previously reported spectra. This was the case with marine natural product cereoanhydride. The originally proposed 7-membered ring anhydride (1) was shown to be incorrect, although a likely precursor to the correct structure (2) in both its laboratory synthesis and biosynthesis. Herein, in addition to showing how NMR computations could have been used to arrive at the correct structure, we show that the conversion of 1 to 2 is indeed energetically viable, and we highlight complications in predicting NMR chemical shifts for molecules with acidic protons

Effective diffusion constant in a two dimensional medium of charged point scatterers

We obtain exact results for the effective diffusion constant of a two dimensional Langevin tracer particle in the force field generated by charged point scatterers with quenched positions. We show that if the point scatterers have a screened Coulomb (Yukawa) potential and are uniformly and independently distributed then the effective diffusion constant obeys the Volgel-Fulcher-Tammann law where it vanishes. Exact results are also obtained for pure Coulomb scatterers frozen in an equilibrium configuration of the same temperature as that of the tracer.Comment: 9 pages IOP LaTex, no figure