Presents a real options model of an agent's decision to purchase or sell a good under conditions of uncertainty, irreversibility, and learning over time. The agent's willingness to pay (WTP) and willingness to accept (WTA) contain both the intrinsic value of the good and an option value associated with delaying the decision until more information is available. The model explicitly demonstrates the effect that timing of an action can have on welfare measurement.
Zhao, Jinhua and Kling, Catherine L., "Real Options and the WTP/WTA Disparity" (1998). CARD Working Papers. 245.