Mathematical programming models, as typically formulated for international trade applications, may contain certain implied restrictions limiting price responsiveness, intermediate product flows, and arbitrage possibilities. These restrictions are especially important in the case of dairy, and...

Perch fisherman in the Great Lakes yellow perch industry are found to use informal vertical exchange relationships which bind together fishermen and buyers through "moral obligations." These exchange arrangements while providing an assured outlet also raise substantial entry and exist barriers...

A simple bieconomic model (the Gordon-SChaefer model) is estimated for three species of tuna in the Eastern Tropical Atlantic. The model conformed well to the data and afforded estimates of maximum sustainable yield, bioeconomic and open access equilibria. Strong marginal stock effects were...

Bioeconomics to date has focused almost exclusively on lumped parameter models where the resource is described by a single state variable defined as biomass. While such models are convenient mathematically they may be inappropriate in fisheries where recruitment and fecundity are dependent on...