Describe the effect of the following events would on the
aggregate demand (AD) curve in the U.S. Answer with SR= shifts
right, SL=shifts left, MU=move up curve, or MD=move down curve.
(a) A boost in research and development by computer companies
produces more powerful and efficient computers and equipment. _
(b) Income falls in several countries that trade heavily with
the U.S.
(c) Prices fall in the economy.
(d) After a budget surplus, Congress moves to cut personal
income taxes.