Peer Effects on GPA Robyn Meikle and Joyce Silver.

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    14-Dec-2015

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<ul><li>Slide 1</li></ul> <p>Peer Effects on GPA Robyn Meikle and Joyce Silver Slide 2 Difficulties Measuring Peer Effects Self-selection bias Determining causal direction Is outcome due to peer effect or preexisting characteristics? Self-selection bias Determining causal direction Is outcome due to peer effect or preexisting characteristics? Slide 3 Overcoming Self-Selection Using randomly generated roommate sample at Dartmouth College Scardote proved this by regressing various background characteristics and proving no correlation among roommates Using randomly generated roommate sample at Dartmouth College Scardote proved this by regressing various background characteristics and proving no correlation among roommates Slide 4 Dummy Variables Used to distinguish outcomes based on subject background from outcomes generated by a peer effect Pre-treatment groups around academic index (high school grades): top 25%, middle 50% or bottom 25% Used to distinguish outcomes based on subject background from outcomes generated by a peer effect Pre-treatment groups around academic index (high school grades): top 25%, middle 50% or bottom 25% Slide 5 Multiple Regression Used to verify causal direction of peer effect Regression 1: subject GPA-roommate GPA Regression 2: subject GPA-roommate background Outcome variable (GPA) is determined by subject background, roommate background and roommate GPA. Used to verify causal direction of peer effect Regression 1: subject GPA-roommate GPA Regression 2: subject GPA-roommate background Outcome variable (GPA) is determined by subject background, roommate background and roommate GPA. Slide 6 Conclusions Why this happens Choice architecture Nurture over Nature? Policy Implications Education policy Questions? Why this happens Choice architecture Nurture over Nature? Policy Implications Education policy Questions? </p>

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