Perhaps this scenario seems familiar. Let’s say you generally do a good job of sticking to your monthly budget, but a rare opportunity arises—maybe a favorite musical artist is in town, or you’ve been invited to a friend’s 25th anniversary event—and you blow past your regular spending limit. It’s all right—you’ll just have to tighten your belt a bit next month. But then your phone stops working, and you have to buy a new model. And now your car needs an expensive repair. Again, these are not ordinary expenses, so you chalk it up to life and go back to your usual budget. And then the invitation to a destination wedding arrives … In this episode of Choiceology with Katy Milkman, we explore a common error around the way individuals and organizations categorize seemingly exceptional expenses.