You can control for quarterly seasonality in your data by
A)de-trending your time-series data.
B)including a time-trend in your regression.
C)including binary dummy variables for all four quarters in your regression.
D)including binary dummy variables for three of the four quarters in your regression.

Question

Quizplus · Accepted Answer

Including binary dummy variables for three of the four quarters in your regression allows you to control for quarterly seasonality by comparing each quarter to the omitted one, which serves as a baseline.

You Can Control for Quarterly Seasonality in Your Data by