Suppose We Run an Experiment and Measure Several Possible Independent

question 2

Multiple Choice

Suppose we run an experiment and measure several possible independent variables after treatment. Which of the following best characterizes why this is a problem?

• A) Independent variables measured after treatment may be affected by the treatment and may therefore soak up some of the treatment effect.
• B) Including post-treatment variables will induce multicollinearity.
• C) Post-treatment variables will not satisfy the inclusion condition.
• D) Including post-treatment variables will cause imbalance in the treated and control groups.

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