Economics paper excerpt on indifference curves and time preference

Economics paper excerpt on indifference curves and time preference The passage is a theoretical discussion of indifference curves and marginal rates of time preference with no mention of individuals, transactions, or controversial actions. It provides no actionable leads for investigation. Key insights: Describes indifference diagram linking consumption of two goods over time.; Defines marginal rate of substitution (MRS) and marginal rate of time preference (MRTP).; Mentions an evolutionary theory of time preference and its extension to fertility effects.