Which of the following is an example of before and after comparisons?
A) The estimation of the quantity demanded of a good when its price is $5
B) The estimation of the demand for a particular good when consumer income is $10
C) The estimation of the ideal number of workers a firm should hire when wage rate is $20 per hour
D) The estimation of the supply of a good when the wage rate of labor changes from $30 to $10 per hour

Question

Quizplus · Accepted Answer

Option D involves a change in a variable, i.e. the wage rate of labor, and its impact on the supply of a good. It presents a before and after comparison as the wage rate changes from $30 to $10 per hour. Options A and B involve single-point estimates, whereas option C does not involve a change in a variable, making D the best choice for before and after comparisons.

Which of the Following Is an Example of Before and After