10 Key Economic Concepts

I've been a bit (or a lot, depending on your point of view) behind, involved, well, just getting rid of a nasty infection. But all is well. Here's some concepts to help you out. Now, please remember there are several different economic theories, and economics being a soft science, some don't always work in every situation. It's not like physics or mathematics. More like sociology or psychology. But these are generally accepted principles.