What's the Difference Between Micro and Macro?

In macro economics, we're looking at spending on all goods and services. We're talking about the supply and demand for all the stuff the economy produces. There is an important trade off or opportunity cost, in macro it's different to the one that guides micro. They actually represent a really different set of ideas. So different, in fact, that we're going to have to spend the rest of the episode digging into just what drives aggregate demand an aggregate supply.