Sunk costs and decision making
Alyssa has plans to go to a movie and already has a $10 nonrefundable, nonexchangeable, and nontransferable ticket. Now Tim, whom Alyssa has wanted to date for a long time, asks her to a party. Alyssa would prefer to go to the party with Tim and forgo the movie, but she doesn't want to waste the $10 she spent on the movie ticket. From the perspective of an economist, if Alyssa decides to go to the movie, what has she just done?
Incorrectly allowed a sunk cost to influence her decision
Correctly ignored a sunk cost
Made an optimal choice