| But countries often face difficulties satisfying these optimality conditions. |
| If the incremental benefit is greater than the incremental cost, achieving optimality would require a further reduction in consumption. |
| Although animals may appear to display optimal behavior, experiments have shown that optimality is rarely achieved. |
| More recently, studies have begun to include mating decisions into an integrative optimality approach to animal behavior. |
| Conversely, in a macroeconomic approach, the question of the optimality and the sustainability of such imbalances is a pressing issue. |
| Habitat optimality, however, does not appear to be linearly correlated with the abundance of small woody stems. |
