That is the title of my contribution to the upcoming book Economics of the Undead: Blood, Brains, and Benjamins, edited by Glen Whitman and James P. Dow. If you are into vampires, then read my essay, the latest draft of which you can find here. My chapter is short, and if you read my work and provide me with your thoughts or feedback (“destructive criticisms” are especially welcome), prior probability will be sure to acknowledge you in the book.