Where a fish stock straddles or migrates between country A's exclusive economic zone (EEZ) and country B's EEZ, or the high seas, vesting ownership rights in the stock with A does not ensure efficient harvesting of the stock. This problem arises in the case of migratory tuna stocks in the...

The objectives of the paper are twofold: to review valuation methods for plant genetic resources and to develop methods to estimate the past and potential future benefits, both domestic and international, of existing germplasm collections in Papua New Guinea (PNG). The analysis concentrates on...