A dynamic bio-economic model is used to show that, without technological and policy intervention, soil nutrient balances, income and nutrition could not be substantially or sustainably improved in a highland area of Ethiopia. Although cash incomes could rise from a very low base by more than 50%...

A dynamic bio-economic model is used to show that, without technological and policy intervention, soil nutrient balances, income and nutrition could not be substantially or sustainably improved in a highland area of Ethiopia. Although cash incomes could rise from a very low base by more than 50%...

This article solves and characterizes optimal decision rules to invest in irreversible land improvements conditional on land tenure insecurity. Economic model is a normative dynamic programming model with known parameter for the one period returns and transition equations. The decision rules are...

Real option theory has for some decades been used in forest economics to analyse decision problems which involve irreversible and stochastic decisions. One such decision is when to harvest a stand and with what species to regenerate. The latter decision can be postponed for some time, making a...

We conduct models and tests to ascertain whether there are speculative bubbles and which factors contribute to the bubbles if there exits one. In the model, we use the option value to represent the investment value of farm real estate and compare the option value, calculated from dynamic...

The paper analyses the governance choices in production quota with the Flemish nutrient production rights as a case. A static model of quota trade in the short run shows the inefficiency of discrete non-auctioned trade with fixed transaction costs. This model also shows that an obligation to...

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....

Carbon pricing was conducted through the subsidy payment for thinning activities in Japan within the optimization framework for the forest stand management. The optimal forest stand management model called DP-KYSS (dynamic programming model for Kyushu stand simulator) was utilized for the...

In many areas of developing countries, economic and institutional factors often combine to give farmers incentives to clear forests and repeatedly plant food crops without sufficiently replenishing the soils. These activities lead to large-scale land degradation and contribute to global warming...

This paper puts forward a model of the role of phosphorus in crop production, soil phosphorus dynamics and phosphorus loading that integrates the salient economic and ecological features of agricultural phosphorus management. The model accounts for the links between phosphorus fertilization,...