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Sketched out answers Final Econ140A 2013Fall

# Sketched out answers Final Econ140A 2013Fall - Economics...

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Economics 140A Fall 2013 Professor Startz Sketched Out Final Answers Note that not all the details are shown here. The sketches here are just to point you in the right direction. A good exam answer would generally have more details. 1. Impulse Response Step Response 2. i) B: ( ) ii) A: . The variance formulas of the OLS estimates derived using the usual assumptions are wrong. iii) D: OLS estimates are biased and the variance formulas of the OLS estimates derived using the usual assumptions are wrong. iv) C: ̂ ̂ ̂ v) B: truffle snuffling pigs 3. Let’s rewrite this equation as: a. We want to test that the coefficients on MARRIED, MARRIED*FE, and MARRIED*BLACK are all equal to zero. This calls for an F test: This gives us: ( ) ( ) 0 0 0 0 0 0 1 1 2 1 1 2 2 0 1.5 2 1 2.5 3 0 0.75 3 1 2.75

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page 2 2 b. The appropriate critical value is ( ) c. so we reject the null hypothesis. d. The marginal effect of being female for whites is . We want to solve for the value of ED when this is equal to -0.1.
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