Prior to beginning work on this discussion, read Chapter 6 in the course text and respond to the following components:

Discuss the reasons why the aggregate demand (AD) curve slopes downward.
What causes the AD curve and aggregate supply (AS) curve to shift, respectively?
How would a change in AD and AS affect the economy, respectively?
Why do Keynesian economists emphasize AD whereas classical economists emphasize AS?

Your initial post should be a minimum of 300 words.