Problem 8. Suppose you want to estimate the effect of class attendance on student performance using the simple model sper f = Bo + B₁attrate + u where sperf is student performance and attrate is attendance rate. (i) Is attrate endogenous in this model? Come up with an unobserved variable that is plausibly correlated with u and attrate. (ii) Let dist be the distance from a student's living quarters to campus. Explain how dist could potentially be correlated with u. (iii) Maintain that dist is uncorrelated with u despite your answer to part (ii) i.e. it is exogenous. Now, what condition must dist satisfy in order to be a valid IV for attrate? Discuss why this condition might hold.
Problem 8. Suppose you want to estimate the effect of class attendance on student performance using the simple model sper f = Bo + B₁attrate + u where sperf is student performance and attrate is attendance rate. (i) Is attrate endogenous in this model? Come up with an unobserved variable that is plausibly correlated with u and attrate. (ii) Let dist be the distance from a student's living quarters to campus. Explain how dist could potentially be correlated with u. (iii) Maintain that dist is uncorrelated with u despite your answer to part (ii) i.e. it is exogenous. Now, what condition must dist satisfy in order to be a valid IV for attrate? Discuss why this condition might hold.
Chapter7: Uncertainty
Section: Chapter Questions
Problem 7.11P
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![Problem 8. Suppose you want to estimate the effect of class attendance on student performance
using the simple model
sper f = Bo + B₁attrate + u
where sper f is student performance and attrate is attendance rate.
(i) Is attrate endogenous in this model? Come up with an unobserved variable that is plausibly
correlated with u and attrate.
(ii) Let dist be the distance from a student's living quarters to campus. Explain how dist could
potentially be correlated with u.
(iii) Maintain that dist is uncorrelated with u despite your answer to part (ii) i.e. it is exogenous.
Now, what condition must dist satisfy in order to be a valid IV for attrate? Discuss why this
condition might hold.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F663d60dd-b231-411b-adfe-df1b30e1ae47%2F2aaecef6-6f72-45fc-822d-e2c503f36681%2Fjt27pi6_processed.png&w=3840&q=75)
Transcribed Image Text:Problem 8. Suppose you want to estimate the effect of class attendance on student performance
using the simple model
sper f = Bo + B₁attrate + u
where sper f is student performance and attrate is attendance rate.
(i) Is attrate endogenous in this model? Come up with an unobserved variable that is plausibly
correlated with u and attrate.
(ii) Let dist be the distance from a student's living quarters to campus. Explain how dist could
potentially be correlated with u.
(iii) Maintain that dist is uncorrelated with u despite your answer to part (ii) i.e. it is exogenous.
Now, what condition must dist satisfy in order to be a valid IV for attrate? Discuss why this
condition might hold.
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