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TERI SAS launches M.Sc. (Energy Studies & Management)
The WTO dispute settlement mechanism: an ex-post analysis of environmental disputes under the WTO and its implications for developing nations

Student name: Mr Shiv Ranjan Singh
Guide: Mr Nitya Nanda
Year of completion: 2014
Host Organisation: Centre for WTO Studies IIFT, New Delhi
Supervisor (Host Organisation): Dr Murali Kallummal
Abstract: Countries have often restricted imports on environmental grounds. In this paper, we estimated the short-run and long run elasticity of the shrimps and tuna exports using the techniques of co-integration and error correction. We have also checked for structural breaks in the data to analyse the impact of import ban. The model was estimated for shrimps and tuna exports using annual data for the period 1975-2013.

The results obtained provide an evidence of a long- run equilibrium relationship between the shrimp’s exports and its major determinants but in case of tuna exports, there is no such existing equilibrium relationship. The error correction predicts that importing country’s GDP has more impact on exports as compared to relative prices in the long run. In the short-run, both the variables are together influencing the exports of shrimps.

The structural break analysis through Chow Test shows that there is no break found in the shrimp’s exports data as there is an increasing demand of the product for the period 1975-2013. For the tuna exports data, we have found a structural break point in the year 1991. We have corrected the problem of the structural break through introducing a dummy variable in the data and found that the results are significant.

Our results suggest that there are opposite impacts of the ban imposed on both the products. Since the demands of shrimps in the US markets have followed an increasing trend without any major break even in the ban period, we conclude that the impact of the ban on exports of shrimps from the four developing nations was negligible.. The declined Mexican exports of tuna to the US markets show that drastic impact of the ban was significant.