All of the following are reasons for using the differences estimator with additional regressors, with the exception of
A)efficiency.
B)providing a check for randomization.
C)providing an adjustment for "conditional" randomization.
D)making the difference estimator easier to calculate than in the case of the differences estimator without the additional regressors.

Question

Quizplus · Accepted Answer

Using additional regressors in the differences estimator makes it more complicated to calculate than the differences estimator without them. Therefore, D is the exception. A, B, and C are all valid reasons for using the differences estimator with additional regressors.

All of the Following Are Reasons for Using the Differences