Analytical results for steady-state values of the biomass that maximises the sum of inter-temporal economic profits (dynamic bMEY) are derived in terms of a generalised harvesting function. The conditions under which dynamic bMEY exceeds the biomass that maximises the sustained yield (bMSY) are...

Marine fisheries in the Asia and the Pacific region play an important role in global, regional and national economies. Many of the fisheries in the region are over-exploited, both biologically and economically. We focus on the use of appropriate fishery targets, and the importance of tying those...

Analytical results for steady-state values of the biomass that maximises the sum of inter-temporal economic profits (dynamic b_MEY) are derived in terms of a generalised harvesting function. The conditions under which dynamic b_MEY exceeds the biomass that maximises the sustained yield (b_MSY) are...

We compare three parametric techniques to approximate Hamilton-Jacobi-Bellman equations via unidimensional and multidimensional problems. The linear programming technique is very efficient for unidimensional problems and offers a balance of speed and accuracy for multidimensional problems. A...

We use a bang-bang optimal control model to derive a rule of thumb for an optimal management of invasive weeds, in terms of the marginal benefits and costs of various control actions. Instead of determining the size of infestation under an optimal surveillance measure, the rule specifies the...

We use a bang-bang optimal control model to derive a rule of thumb for an optimal management of invasive weeds, in terms of the marginal benefits and costs of various control actions. Instead of determining the size of infestation under an optimal surveillance measure, the rule specifies the...

We compare three parametric techniques to approximate Hamilton-Jacobi-Bellman equations via unidimensional and multidimensional problems. The linear programming technique is very efficient for unidimensional problems and offers a balance of speed and accuracy for multidimensional problems. A...

A key challenge in managing semi-arid Basins, such as in the Murray-Darling in Australia, is to balance the trade-offs between the net benefits of allocating water for irrigated agriculture, and other uses, versus the costs of reduced surface flows for the environment. Typically, water planners...

A dynamic computable general equilibrium model provides a tool for analysing the regional economic consequences of a hypothetical plant pest incursion. The model is very detailed at the industry and regional level. It includes a theory of regional labour market adjustment. In our example, a...

This study uses a dynamic multi-regional computable general equilibrium (CGE) model to estimate the micro- and macroeconomic effects of a hypothetical disease outbreak. The extent of the incursion, the impact of the disease on plant yields, the response of buyers, the costs of eradication and...