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Author Question: For W to be an effective control variable in IV estimation, the following condition must ... (Read 180 times)

yoooooman

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For W to be an effective control variable in IV estimation, the following condition must hold

Question 2

In practice, the most difficult aspect of IV estimation is



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ricroger

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Answer to Question 1



Answer to Question 2





yoooooman

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Reply 2 on: Jun 29, 2018
Excellent


ghepp

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

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