All of the Following Are Reasons for Using the Differences

question 18

Multiple Choice

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.