A new model of exchange is presented following Marr's conception of a "computational theory". The model combines assumptions from perceptual theory and economic theory to develop a highly generalised formal model. The approach departs from previous models by focussing not on how ownership alters...

We hypothesise and confirm a novel empirical result concerning the willingness to accept (WTA)-willingness to pay (WTP) disparity. Employing data from what has become the classic experimental design, we reveal systematic variation in the relative magnitudes of three valuations: WTA, WTP and...