Decades of research since have established that we can become endowed to things for additional reasons other than loss aversion. In the process, a broader understanding of what we think we own has been developed. The original work on the endowment effect was about the physical ownership of objects and the additional value we impute to those objects once they are in our possession. But as Carey Morewedge and Colleen Giblin pointed out in a 2015 review of the literature, we can become endowed to much more than physical objects. As the research on the endowment effect has expanded, it has become
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