To explain trade-offs in choice, researchers have proposed myriad phenomena and decision rules, each paired with separate theories and idiosyncratic vocabularies. Yet most choice problems are ultimately resolved with one of just two types of solutions: mixed or extreme. For example, people adopt...

Intrinsic motivation (IM) is key for persistence at work. When they are intrinsically motivated, people experience work activities as an end in itself, such that the activity and its goal collide. The result is increased interest and enjoyment of work activities. In this article, we review the...