hw05 - Soc 63993, Advanced Social Statistics II Homework...

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Homework #5 — Model Mis-Specification/Equality Constraints/Group Comparisons — Page 1 Soc 63993, Advanced Social Statistics II Homework No. 5 Model Mis-Specification/Equality Constraints/Group Comparisons 1. Model mis-specification. A campaign manager has found that the amount of time spent watching TV political ads is negatively correlated with favorable opinion of her candidate. Two models have been proposed to explain this relationship: (i) Amount watch TV Political Ads Education Opinion of Candidate - + + (ii) Amount watch TV Political Ads Opinion of Candidate - A. Suppose that model (i) is correct. What harm will result from estimating model (ii) and relying on the results? If appropriate, discuss such things as biased coefficients, inflated standard errors, and misguided policy decisions (particularly with regards to the use of TV advertising). Similarly, discuss the harm that will result if Model (ii) is correct and model (i) is mistakenly estimated and relied upon. B. Model (i) is estimated, yielding the following results. Based on this information, determine what the regression coefficient would be for model (ii). Compute the regression coefficient using both the formula for omitted variable bias and the formula for the slope
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hw05 - Soc 63993, Advanced Social Statistics II Homework...

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