This study presents a multispecies stochastic model. The model suggests optimal fishing policy for two species in a three species predator prey ecosystem in the Barents Sea. We have employed stochastic dynamic programing to solve a three dimensional model, where catch is optimized by a...

In commercial fisheries, stock collapse is an intrinsic problem caused by overexploitation or due to pure stochasticity. To analyze the risk of stock collapse, we apply a relatively simple Monte Carlo approach which can capture complex stock dynamics. We use an economic model with downward...

This paper demonstrates a predator-prey system of cod and capelin that confronts a possible scenario of prey extinction under the first-best policy in a stochastic world. We discover a novel ‘super-harvest' phenomenon that the optimal harvest of the predator is even higher than the myopic...

Renewable resources are affected by both environmental variability, which makes the year-to-year stock growth uncertain, and the risk of irreversible events (e.g., a stock collapse). Little is known about how a renewable resource harvester would optimally respond to the combined effects of both...

Policy makers constantly face optimal control problems: what controls allow to achieve certain targets in, e.g., GDP growth or inflation? Conventionally this is done by applying certain linear-quadratic optimization algorithms to dynamic econometric models. Several algorithms extend this...

Recently, Batabyal and Yoo (2007) have proposed a new probabilistic approach to orchard management. In this approach, a manager minimizes an economic criterion function, namely, the long run expected net cost of orchard management subject to an ecological constraint which says that the...

Actions taken by a manager affect the health of the keystone species of an ecological-economic system. In turn, the health of these keystone species largely determines the resilience of the underlying ecological-economic system. What are the nexuses between managerial actions, keystone species,...

Recently, Batabyal and Yoo (2007) have proposed a new probabilistic approach to orchard management. In this approach, a manager minimizes an economic criterion function, namely, the long run expected net cost of orchard management subject to an ecological constraint which says that the...

Actions taken by a manager affect the health of the keystone species of an ecological-economic system. In turn, the health of these keystone species largely determines the resilience of the underlying ecological-economic system. What are the nexuses between managerial actions, keystone species,...

The focus is upon equilibrium real exchange rates, optimal external debt and their interaction, in a world where both the return on investment and the real rate of interest are stochastic variables. These theoretically based measures are applied empirically to answer the following questions:...