Irving Fisher's Physical Model of the Economy

Evaluating Economic Modeling Approaches

An economist is designing a demonstration for an introductory class to illustrate how the supply of goods, consumer income, and consumer preferences interact to determine market prices. What is the primary advantage of using a physical, mechanical apparatus for this demonstration over a purely mathematical or descriptive one?

An economist builds a physical model to demonstrate the flow of money in a simple economy. The model uses a system of interconnected water tanks and pipes. Match each component of the physical model to the economic concept it most likely represents.

Analysis of a Physical Economic Model

A physical apparatus designed to visually represent the flow of goods and money in an economy is not considered a true economic model because it lacks a mathematical foundation.

Limitations of Physical Economic Models

An economics instructor wants to create a memorable, hands-on demonstration for a group of introductory students to illustrate the dynamic and interconnected nature of a simple economy. For which of the following concepts would a physical apparatus, such as a system of interconnected water tanks and levers, be the most suitable and intuitive teaching tool?

Designing a Physical Economic Model

Interpreting a Physical Economic Model

An economist builds a physical model using a system of interconnected pipes and valves to regulate the flow of colored liquids between several large containers. What fundamental economic principle is this type of apparatus best suited to visually demonstrate?