This document discusses indifference curve analysis, which is an approach to consumer choice developed by Edgeworth and later preferred by Hicks and Allen. It assumes consumers express their preferences over bundles of goods through indifference curves rather than quantifying utility. The key points are: - An indifference curve represents combinations of two goods that provide equal satisfaction or utility to a consumer. - Indifference curves have a negative slope and are convex, with the marginal rate of substitution decreasing along the curve. - Higher indifference curves correspond to higher levels of satisfaction. - An indifference schedule and map are used to graphically represent a consumer's preferences between combinations of goods.