Sustainability: Dynamics and Uncertainty

of ecological (also biological) variables b which interact in their dynamic t evolution: det dbt dt = f (et, bt)' dt = 9 (et, bt)· Among the solution paths to this interaction between economic and ecologi­ cal variables, we look for those which are sustainable. Sustainable paths are typically those along which the values of certain key sks are always pos­ itive, these key sks being important environmental resources. The types of paths on which certain variables can be positive forever inclu...