reminds me of a joke: a farmer has a bunch of chickens that aren't laying eggs, so he asks a physicist for help. the physicist leaves, does some calculatio

reminds me of a joke: a farmer has a bunch of chickens that aren't laying eggs, so he asks a physicist for help. the physicist leaves, does some calculations, etc etc, and comes back with the following answer. "well I've solved your problem, but it only works for spherical eggs in a void" I'm sure that economists have much the same issue. All of their theories work just fine with rational humans in a vacuum.