Heterogeneous Good

Abstract

A heterogeneous good is a good that is not interchangeable with others of its class because each is a distinct bundle of characteristics that buyers value separately, and whose characteristics are not separately traded. Real estate is the canonical example: locational uniqueness guarantees that no two properties share an identical characteristic vector, and the bundling of physical, legal, and environmental attributes by the production technology of the good means that characteristics cannot be purchased on their own. This article, the first in the Foundations section of The Valuation Engineer Journal, situates heterogeneity as the root condition that makes valuation methodology necessary. Each of the three traditional approaches to value --- sales comparison, cost, and income --- is recast as a distinct methodological response to heterogeneity rather than as an independent valuation framework. A worked example from Pacifica, California, illustrates how the heterogeneous-goods framing sharpens the analytical questions an appraiser must answer in any paired-sales adjustment.