Economic models are going to change because of the economic crisis and you need to start reading some of the future important theorists.
One such individual might be Wynne Godley, the subject of this interesting New York Times profile.
Traditional schools of economics presume rational behavior and perfect information.
Godley disagreed. From the article:
"In mainstream economic models, individuals are supposed to optimize the trade-off between consuming today versus saving for the future, among other things. To do so, they must live in a remarkably predictable world.
Mr. Godley did not see how such optimization is conceivable. There are simply too many unknowns, he theorized.
Instead, Mr. Godley built his economic model around the idea that sectors — households, production firms, banks, the government — largely follow rules of thumb."
List of our Godley books here.