Simulations are taken very seriously in all sciences but economics. This great article in the New York Times by Mark Buchanan makes an excellent case in favor of doing more simulations to deal with thorny problems in economics. Thanks to Rob Gilles for sending me the link. I completely agree with Buchanan. I am slowly learning how to do simulations, and am amazed at how good they can be at proviging insights into truly complicated problems, including the functioning and, lately, malfunctioning of markets.