Example image of eyePlorer eyePlorer map for 'Marginal rate of substitution': Marginal utility Measure (mathematics) Implicit function Total derivative X Budget constraint Distortion (economics) Exponential discounting Revealed preference Samuelson condition Contract curve Elasticity of substitution Marginal rate of technical substitution Ordinal utility Substitute good Marginal concepts Social cost Time preference Value and Capital Edgeworth box MRS MUX Welfare economics Mechanism design Pareto efficiency Indifference curve General equilibrium theory Labour economics Production theory basics Public good