metricsexam1s08

metricsexam1s08 - Econometrics Exam 1 March 4 2008 By...

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Econometrics Exam 1 By writing your PID below, you are indicating March 4, 2008 your intention to abide by the honor pledge: PID: This exam consists of ten short questions ( worth four points each ) and three long questions ( worth twelve points each, unless noted otherwise ) and one bonus question ( worth two points ) , for a total of 90 points. You have 75 minutes to answer all completely and clearly in the space provided. Please do not use any electronic devices. Short Questions 1. Under what circumstances does classical measurement error ( in the explanatory variables ) have no effect on the OLS estimator? 2. What is the objective function of a “weighted least squares” estimator ( that is, what does it minimize or maximize? ) , and under what circumstances is WLS unbiased? 3. What does it mean for a variable to be “exogenous”?
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4. What would determine whether you use the t - distribution instead of the z - distribution?
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metricsexam1s08 - Econometrics Exam 1 March 4 2008 By...

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