Which of the following characteristics of an instrumental variable can be verified with certainty in the data?
A. Relevance
B. Exogeneity
C. Both A and B
D. Neither A nor B
Answer: A. Relevance
Which of the following characteristics of an instrumental variable can be verified with certainty in the data?
A. Relevance
B. Exogeneity
C. Both A and B
D. Neither A nor B
Answer: A. Relevance