The movie (no spoilers)
1 hour ago
MF: There should be a computer program to tell us the prices of the commodities.
YHN: But the value of each is subjective; why would you trust a computer program to value them for you?
MF: It's just supply and demand!
YHN: So you're going to assume the players are rational and devise a utility function for Settlers?
WF: By that point, you might as well let the computer play for you.
...and I'll trade you three sheep if you exchange two through your port for one bricks and then give me the bricks...