Abstract
A quantitative model of discard is presented. It is directed toward resolving the difficulty in relating frequency of archaeologically observed material objects to occurrences of past behavior. Schiffer’s (1976) Pathway Model is revised and expanded as the basis of this analysis. Mathematical expressions are developed relating frequency of cultural deposition to past behavior. The pathways of deposition considered are use-related discard, accidental loss, and deterioration during storage. Application of these relations to specific archaeological problems will require estimates of certain variables that should be based on ethnographic and experimental data.

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