The Annual Meeting of the American Economics Association tries to work out how Google works or how AdWords changed the world:
A tidbit:
During the question-and-answer period, a man wearing a camel-colored corduroy blazer raises his hand. “Let me understand this,” he begins, half skeptical, half unsure. “You say that an auction happens every time a search takes place? That would mean millions of times a day!”
Varian smiles. “Millions,” he says, “is actually quite an understatement.”
Lid dip @joshgans