law of diminishing marginal utility

This theory can help researcher mark out the right scope of the law of diminishing marginal utility and the point of external economies that is punished or not.

生态价值的刚性规律能够确定边际效用递减理论的适用范围，确定对外部不经济处罚的理论界限，为可持续发展提供了理论指导。

the main thought on equity at present, theory on social insurance, law of diminishing marginal utility, a theory of justice by john rawls, pareto optimality and pareto improvement can be used for reference to establish the equity theory of insured peasants.

现阶段关于公平的主导思想、社会保障理论、边际效用递减规律、罗尔斯正义理论、帕累托最优和改进等对新农合制度需方公平性理论的建立能够提供借鉴和依据。