消費者行動の理論 : 効用関数、需要曲線、消費者余剰についての一考察

概要

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Economics begins with Supply and Demand. The purpose of this paper is to examine the basic assumptions when we derive the demand curve and to consider how the assumptions about the decreasing (increasing, or constant) marginal utility affects the demand curve, or how we read the curve. That is, do we read it horizontally or vertically? We examine the consumer's surplus. We present an interpretation about it when the marginal utility of money is not constant. Our main point of this paper is, how to derive the consumer's surplus when the demand curve is upward sloping, i.e., the Giffen Case. If the demand curve is globally upward sloping, the consumer's surplus is negative. It is certain that the utility should increase even in the Giffen Case, so the consumer's surplus should be positive. We show the graphical explanation of the consumer's surplus in the Giffen case.
関西学院大学の論文
2004-06-20