If you're living in Europe, deflation is already here. Deflation means that inflation is plunging, so prices are dropping. So what's the big issue? If rising prices (inflation) are generally considered a bad thing, then shouldn't falling prices (deflation) be a good thing? Well, yes and no. Economics professor Ed Dolan is on hand with an easy-to-understand presentation (no economics degree needed), showing the circumstances in which deflation can be a good and bad thing.