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Consider the Following Simple Regression Model Y = 0

question 23

Multiple Choice

Consider the following simple regression model y = Consider the following simple regression model y =   <sub>0</sub> +   <sub>1</sub>x<sub>1</sub> + u. Suppose z is an instrument for x. Which of the following conditions denotes instrument relevance? A) Cov(z,u)  > 0 B) Cov(z,u)  < 0 C)  Cov(z,x)    0 D)  Cov(z,x z)  = 0 0 + Consider the following simple regression model y =   <sub>0</sub> +   <sub>1</sub>x<sub>1</sub> + u. Suppose z is an instrument for x. Which of the following conditions denotes instrument relevance? A) Cov(z,u)  > 0 B) Cov(z,u)  < 0 C)  Cov(z,x)    0 D)  Cov(z,x z)  = 0 1x1 + u. Suppose z is an instrument for x. Which of the following conditions denotes instrument relevance?


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