The death effect on artists prices actually occurs when they’re alive.

According to economists the death effect of artists prices is actually only observable for the five years before an artist dies. The theoretical underpinnings for their conjecture are simple, but sophisticated in their application. Prices are governed by the interaction between supply, the quantity and quality of a good or service, and the demand for it. In the art world, demand for an artist is influenced by many factors, such as critical reception, museum shows, and which collectors or institutions own works. But over the course of an artist’s lifetime, supply is governed chiefly by one factor: the artist who produces the work.
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