D) The products sold by all firms in the market are identical.
Last year, Joan bought 50 pounds of hamburger when her household income was
$40,000. This year, her household income was only $30,000 and Joan bought 60 pounds
of hamburger. Holding everything else constant, Joan’s income elasticity of demand for
hamburger is
A) positive, so Joan considers hamburger to be an inferior good.
B) negative, so Joan considers hamburger to be an inferior good.
C) positive, so Joan considers hamburger to be a normal good and a necessity.
D) negative, so Joan considers hamburger to be a normal good.
Which of the following is the best example of a firm that competes in a
monopolistically competitive market?
A) the U.S. Postal Service
B) Microsoft
C) a movie theater
D) an automobile manufacturer