Why do art prices change over time? The characteristics of an individual art object (the artist, school and topic) do not change over time. If art prices reflect the intrinsic value (beauty) of art, does this imply that the intrinsic value of art changes over time?
Figure 1 shows the development of the art prices over time (green line), based on repeatedly traded art objects at British auction houses. Could we conclude from this figure that art had more intrinsic value in 1990 than in 1970? It turns out that the changes in the instrinsic value of art are not the only story behind the graph. There is evidence that an increase in income inequality may lead to higher prices for art.
Figure 1




