单选题 Marko Tskitishvili, an economist, has been studying the drop in the price of the average household computer in the U.S. and wonders if computers should still be considered a luxury good or if it has now become a normal good. He conducts a survey of 500 people and finds the following:

1998
2005
Avg.Household Income
$41000
$53000
Avg.Computers Purchased per Household
0.42
0.57
Assume that 1998 is the base date.
Based on the above data, Tskitishvili would conclude that a computer is a:
  • A. luxury good with income elasticity of 1.01.
  • B. normal good with income elasticity of 0.84.
  • C. luxury good with income elasticity of 1.18.
【正确答案】 C
【答案解析】% change in Computers demanded =(0.57-0.42)/0.495=30.30% % change in income =($53000-$41000)/$47000 =25.53% 30.30%/25.53%=1.18 1.18>1 so Tskitishvili would conclude that computers are luxury goods.