And the models have to come from multiple disciplines—because all the wisdom of the world is not to be found in one little academic department. . . . You’ve got to have models across a fair array of disciplines. You may say, “My God, this is already getting way too tough.” But, fortunately, it isn’t that tough—because 80 or 90 important models will carry about 90 percent of the freight in making you a worldly-wise person. And, of those, only a mere handful really carry very heavy freight.
