15. A) Give three examples of changes that would cause the AD curve to shift right. B) Give three examples of changes that would cause the AD curve to shift left. 16. Why is the LAS vertical? 17. A) Give one important example of a cause of a SAS shift right. B) Give one important example of a cause of a SAS to shift left. 18. A) What will cause the LAS to shift right? B) What are the sources of economic growth? 19. Assume the economy initially is at full employment (potential output). Illustrate the short- run effects of each of the following: A) A dramatic increase in consumer condence. B) A dramatic increase in government spending. C) A collapse in the economies of Europe. D) Dollar appreciation. E) Contractionary scal policy F) Expansionary monetary policy. 20. A) In the US currently, where do you think the economy is at relative to the LAS curve? Explain. B) Go back to your answers to 9(A), 9D), and 10(A) above, are you concerned with unemployment? Employment levels? Ination