Why did evolution not give us a utility function that is offspring alone? Why do we care intrinsically about other outcomes, food, for example, and what determines the intensity of such preferences? A common view is that such other outcomes enhance fitness and the intensity of our preference for...

Psychologists report that people make choices on the basis of "decision utilities" that routinely overestimate the "experienced utility" consequences of these choices. This paper argues that this dichotomy between decision and experienced utilities may be the solution to an evolutionary design...

We study contractual arrangements that support an efficient use of time in a knowledge-intensive economy in which agents endogenously specialize in either production or consulting. The resulting market for advice is plagued by informational problems, since both the difficulty of the questions...

We study contractual arrangements that support an efficient use of time in a knowledge-intensive economy in which agents endogenously specialize in either production or consulting. The resulting market for advice is plagued by informational problems, since both the difficulty of the questions...

An expert must train a novice. The novice initially has no cash, so he can only pay the expert with the accumulated surplus from his production. At any time, the novice can leave the relationship with his acquired knowledge and produce on his own. The sole reason he does not is the prospect of...