farm-raised species are now considered as price-indicators on the main market places. One may, therefore, expect the price … of theses cultured shrimp to have an impact on the price formation of other species and especially on wild shrimp with … Tiger'. A series of econometric tests issued from the co-integration theory is performed between the price series of the two …

We examine the degree of natural gas market integration in Europe, North America and Japan, between the mid 1990's and … 2002. The relationship between the international gas marker prices, and their relation to the oil price, are investigated …