Positive Economics:Positive economics is the study of the economy as it is, without making value judgments. It focuses on objective, factual, and testable statements about economic phenomena.
Welfare Economics: Welfare economics is a normative field of study that examines how the allocation of resources affects social welfare and well-being.
Pareto Efficiency: Pareto efficiency is a state of resource allocation where it is impossible to make one person better off without making someone else worse off.