1. Trade off
2. Opportunity cost
3. Cost-benefit analysis
4. Diminishing marginal utility
Explanation:
1. Giving up one benefit or advantage to gain another regarded as more favorable is called trade-off. Every economic decision involves some trade-off.
2. Opportunity cost is the second-best alternative or value of the alternative, that must be given up when making a choice. Because of scarce resources with alternative uses allocation of resources involves some opportunity cost.
3. Cost-benefit analysis can be defined as the process of examining the benefits and costs of each available alternative in arriving at a decision. Resources are allocated efficiently if the cost incurred and benefit earned is equal.
4. As we go on increasing the quantity consumed of a product, the marginal utility or satisfaction earned from its consumption goes on decreasing. This is called diminishing marginal utility.