In an attempt to reduce the use of gasoline, a city imposed a $2.50 per gallon tax on gasoline in 2005. A researcher working for the city, located data on annual gallons used for the 5 years leading up to the gas tax to provide a baseline) and located data for the 5 years after the start of the gasoline tax to show the consumption pattern after the tax). Which of the following best describes this study design?
A) A-B-A-B design
B) Changing-criterion design
C) Interrupted time-series design
D) Regression-discontinuity design

Question

Quizplus · Accepted Answer

The study design is best described as an interrupted time-series design because it involves observing and analyzing data before and after the implementation of an intervention (in this case, the gasoline tax) to assess its impact.

In an Attempt to Reduce the Use of Gasoline, a City