In deciding to keep or fell a forest stand given its age, the risk of loss of timber through wildfire is an important consideration. If trees also have value from sequestration of carbon, another effect of fire is the unplanned loss of stored carbon. Factors affecting the decision to keep or...

Concern over the appearance of algal blooms in Summer months on Australian waterways has been increasing in recent years. Some algae are toxic to humans and livestock when ingested. To avoid the dangers of contaminated drinking water, costs must be incurred, either by eliminating nutrient...

An optimising model is developed to determine the .sequence of total allowable catches of western mackerel which would result in the maximum present value of the stream of annual rents. It is found that the optimal steady state fishing mortality would be one half to one third of recent levels....