Endowment Effect

‘This pattern—the fact that people often demand much more to give up an object than they would be willing to pay to acquire it—is called the endowment effect (Thaler, 1980).’
Thaler (1992) [book]

‘The endowment effect (Thaler 1980), also known as “status quo bias” (Samuelson and Zeckhauser 1988), is the phenomenon in which most people would demand a considerably higher price for a product that they own than they would be prepared to pay for it (Weber 1993).’
Goldberg and von Nitzsch (1999, p. 99)

‘The endowment effect is a hypothesis that people value a good more once their property right to it has been established. In other words, people place a higher value on objects they own relative to objects they do not. In one experiment, people demanded a higher price for a coffee mug that had been given to them but put a lower price on one they did not yet own. The endowment effect was described as inconsistent with standard economic theory which asserts that a person's willingness to pay (WTP) for a good should be equal to their willingness to accept (WTA) compensation to be deprived of the good. This hypothesis underlies consumer theory and indifference curves.’
Wikipedia (2006)

‘We also have a bias toward keeping the securities we inherit instead of investing them in vehicles that are more appropriate to our needs (the endowment effect).’
Nofsinger (2001, p. 3)

Endowment effect. People often demand much more to sell an object than they would be willing to pay to buy it.’
Nofsinger (2001, p. 35)

‘Thaler (1980) coined the term “endowment effect” to refer to the finding that randomly assigned owners of an object appear to value the object more than randomly assigned non-owners of the object. For instance, in one well-known series of endowment effect experiments, Kahneman, Knetsch and Thaler (1990) found that randomly assigned owners of a mug required significantly more money to part with their possession (around $7) than randomly assigned buyers were willing to pay to acquire it (around $3). Kahneman et al. (1990, 1991) and Tversky and Kahneman (1991) attributed this result to loss aversion: owners’ loss of the mug loomed larger than buyers’ gain of the mug.’
Gal (2006)

"Both the status quo bias and the endowment effect are part of a more general issue known as loss aversion." (Montier 2007, p. 32)

"Simply put, the endowment effect says that once you own something you start to place a higher value on it than others would." Montier 2010, p. 194

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