FROM NATURAL VARIATION TO OPTIMAL POLICY? THE IMPORTANCE OF ENDOGENOUS PEER GROUP FORMATION
We take cohorts of entering freshmen at the United States Air Force Academy and assign half to peer groups designed to maximize the academic performance of the lowest ability students. Our assignment algorithm uses nonlinear peer effects estimates from the historical pre-treatment data, in which stu...
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| Veröffentlicht in: | Econometrica 2013-05, Vol.81 (3), p.855-882 |
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| container_title | Econometrica |
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| creator | Carrell, Scott E. Sacerdote, Bruce I. West, James E. |
| description | We take cohorts of entering freshmen at the United States Air Force Academy and assign half to peer groups designed to maximize the academic performance of the lowest ability students. Our assignment algorithm uses nonlinear peer effects estimates from the historical pre-treatment data, in which students were randomly assigned to peer groups. We find a negative and significant treatment effect for the students we intended to help. We provide evidence that within our "optimally" designed peer groups, students avoided the peers with whom we intended them to interact and instead formed more homogeneous subgroups. These results illustrate how policies that manipulate peer groups for a desired social outcome can be confounded by changes in the endogenous patterns of social interactions within the group. |
| doi_str_mv | 10.3982/ECTA10168 |
| format | Article |
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We provide evidence that within our "optimally" designed peer groups, students avoided the peers with whom we intended them to interact and instead formed more homogeneous subgroups. 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| ispartof | Econometrica, 2013-05, Vol.81 (3), p.855-882 |
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| source | Wiley Online Library Journals Frontfile Complete; JSTOR Mathematics & Statistics; Jstor Complete Legacy |
| subjects | Academic achievement Coefficients Cohort analysis Control groups Fractions Grade point average Group dynamics Group interaction homophily Mathematical variables Optimization algorithms P values Peer effects Peer groups Peer relationships Social interaction social network formation Social psychology Standard error Standardized tests Students Studies U.S.A |
| title | FROM NATURAL VARIATION TO OPTIMAL POLICY? THE IMPORTANCE OF ENDOGENOUS PEER GROUP FORMATION |
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