Answer to Question #123729 in Microeconomics for Saman

Question

What is the marginal rate of substitution between two complementary goods?

Answer 1

In economics the marginal rate of substitution beween two complementary goods is the rate at which a consumer can give up some amount of one good in exchange for another good while maintaining the same level of utility.

For these reason at equilibrium consumption levels assuming there is no externalities, marginal rates of substitution are identical.