Abstract
Two qualitative choice models of the location decisions of U.S. purse-seine vessels operating in a total of sixty-five 5° grids in the western Pacific tuna fishery are developed and compared. A nested logit model in which decisions are first made about where to fish in the east-west plane, followed by a choice of grid in the north-south plane, performs better than a nonnested model in which all grids are considered simultaneously. The nested model can be used for the allocation of purse-seine fishery effort in a spatially disaggregated bioeconomic model of the regional tuna fishery.
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