The wages of plumbers are likely to increase when
A) licensing standards for the occupation are increased.
B) there is an increase in the cost of plumbing supplies.
C) the length of the training period for plumbers is decreased.
D) more do-it-yourself home improvement centers open across the nation.

Question

Quizplus · Accepted Answer

Increasing licensing standards would make it more difficult for people to become licensed plumbers, which would reduce the supply of plumbers. This decrease in supply would lead to an increase in wages for those who are licensed. The other options do not have a direct impact on the supply or demand for plumbers, and therefore would not necessarily lead to an increase in wages.

The Wages of Plumbers Are Likely to Increase When