71. Which of the following questions would not be studied by a microeconomist but would be studied by a
macroeconomist?
Why do national economies grow?
What percentage of consumer income is spent on entertainment?
Why do workers prefer the 4-day workweek?
How is the electric industry harmed by the passage of new clean air legislation?
72. The basic purpose of economic models is to:
construct simplifying assumptions about the real world.
explain reality in all its complexity.
construct situations where controlled experiments can be carried out.
provide explanations for, and predictions of the relationship between variables.
73. Economists use models to:
abstract from the complexities of the world.
understand economic behavior.
explain and help predict human behavior.
74. An economist at the University of Alaska at Anchorage has been asked to explain why the price of
Alaskan crude oil has fallen recently. In order to develop a model, the professor should take which
steps?
Identify the problem, develop a model based on simplifying assumptions and test the
model to formulate a conclusion.
Gather data on crude oil prices and seemingly unrelated variables in order to look for
associations, then formulate a hypothesis based on those unexpected associations.
Ask people in Alaska why they are not purchasing oil.
None of these. The oil industry is controlled by a cartel; therefore price changes in the
industry cannot be explained using economic theories.
75. A model is defined as a:
description of all variables affecting a situation.
positive analysis of all variables affecting an event.
simplified description of reality to understand and predict an economic event.
prediction based on historical evidence.
76. A theory is:
based only on critical factors or variables.
a detailed description of reality.
a simplified abstraction of the real world.