Question

what does elasticity measure in economics?
○ how the amount of a good changes when the producer hires more employees
○ how the amount of a good changes when the producer uses new materials
○ how the amount of a good changes when its price goes up or down
○ how the amount of a good changes when its distribution expands

Explanation:

In economics, elasticity measures the responsiveness of the quantity of a good (or service) to a change in one of its determinants, most commonly price. So we analyze each option:

• The first option is about labor (hiring employees) affecting quantity, which is not elasticity's focus.
• The second option is about new materials affecting quantity, not related to elasticity.
• The third option: Price elasticity of demand/supply measures how quantity changes with price changes, which matches elasticity's definition.
• The fourth option is about distribution expansion, not related to elasticity.

Answer:

C. how the amount of a good changes when its price goes up or down