I'm confused. Why are economics (theories) so complex? To me, it all seems like a make-work project for failed - lazy? - mathematicians trying to make themselves look important. I have an answer to the world economic crisis, comprising only 2 things:

1. Fix the price of all currency on an actual valued commodity/product that is de-regionalized (i.e. not oil);
2. Flat taxes on all income (individual human beings, and, yes, I'm going to say it, companies).

Done, and done.

PS I was tempted to add a third item, no more gambling (aka the stock market), but the above two take care of that fairly handily.